Airalo vs Holafly for Spain: Unlimited vs Metered Data Compared

You land at Madrid-Barajas, switch off airplane mode, and your phone stays on “No Service” while your home carrier’s roaming text warns you about charges. Then you have to choose a travel eSIM. This guide compares Airalo’s metered plans with Holafly’s unlimited plans for Spain, so you can buy the data you will actually use.

Unlimited vs Metered Data in Spain: What You Are Actually Choosing

My first trip here was years before I moved permanently, and I made the mistake most newcomers make. I bought on the strength of one word. “Unlimited” felt safe, so I paid for it without thinking about how I use my phone. I spent most of that week on hotel Wi-Fi and café networks in Malasaña, so I had paid for plenty of data I never touched. On a later trip I went the other way, bought too small a plan, and ran dry halfway through a day trip to Toledo. I was standing near the cathedral trying to load a train timetable. Neither mistake ruined a holiday, but both cost money and patience.

The choice comes down to two pricing models, and each one suits a different kind of traveller. To compare them fairly, you need to know what each model does once your phone connects to a Spanish tower.

How a Metered eSIM Works on a Spanish Trip

A metered eSIM gives you a fixed amount of data for a fixed period. You choose a package size, it activates when it connects to a supported network, and it runs until you use up the data or reach the end of the validity period. Airalo is built on this model. Its Spain plans come in a ladder of sizes, from small packages for a short city break to larger ones for longer stays. Prices change, so check Airalo’s own plan page for current sizes, validity periods and costs before you buy.

The main advantage is predictability. You know up front how much data you have, and the app shows how much is left. If you are mostly using maps, messaging, the Renfe app and the odd Instagram story, you can buy a package that fits and stop paying for anything beyond it. The main drawback is that you have to pay some attention. If you stream video on the AVE from Madrid to Seville and leave cloud photo backup running all day, a small plan will run out fast.

Most travellers end up somewhere in the middle. They need reliable data for navigation, ride-hailing with Cabify or a taxi app, restaurant bookings, digital tickets for the Alhambra or the Sagrada Família, and WhatsApp with people back home. That usage is modest and predictable, which is exactly where metered plans do well.

What Unlimited Really Means on Holafly’s Spain Plan

Holafly sells its Spain plans as unlimited data for a set number of days. You don’t watch a counter. You pay for the length of the trip and use the connection as you like. For heavy users, or for anyone who simply doesn’t want to think about data, that is appealing.

There are conditions, though, and Holafly states them on its own Spain page. It does not publish a daily data threshold. It says that in rare cases your speed may be reduced under the network operator’s Fair Usage Policy, that any slowdown lasts no more than one day, and that full speed returns the next day. So throttling is possible after very heavy use on a given day, but there is no published number for when it starts. Plan on the basis that a slowdown can happen and is temporary, not that you are safe up to some specific amount.

The second condition matters more for many people. Holafly limits hotspot sharing to 1 GB per day. If you planned to run a laptop off your phone, or share your connection with a partner whose phone has no eSIM, that limit applies whatever “unlimited” suggests. Your phone gets unlimited data. Other devices tethered to it get 1 GB per day.

Why the Label Matters Less Than Your Habits

After years of hosting visiting friends and family, I’ve noticed that people rarely know how much mobile data they use while travelling. At home your phone sits on Wi-Fi most of the day without you noticing. In Spain you are out more, navigating more and photographing more, but you are also sitting in places with free Wi-Fi more often than you would expect. Most hotels, plenty of cafés, many long-distance trains and a lot of tapas bars have a network you can join.

So before you think about brands, think about your habits. Do you watch video on the go, or only on Wi-Fi in the evening? Do you upload photos as you take them, or sort them at the end of the trip? Are you working remotely and depending on the phone as your only connection? Answer those questions honestly and the choice between unlimited and metered usually becomes clear. For help working out your own numbers, see How Much Data Do You Need in Spain? Plan Sizing by Trip Length.

Side-by-Side Comparison for Spain Travellers

Here are the structural differences in one place. I’ve left out prices on purpose. They change too often to print reliably, and the provider’s own page is the only place to get current figures.

Feature	Airalo metered plans	Holafly unlimited plans
Pricing model	Pay for a fixed data allowance within a fixed validity period	Pay for a number of days with no data counter
Daily data threshold	Not applicable, you use your allowance at your own pace	No published daily threshold
Speed reduction policy	Data stops when the allowance runs out, unless you top up	Speed may be reduced in rare cases under the operator’s Fair Usage Policy, for no more than one day, resetting the next day
Hotspot sharing	Shared data counts against your allowance, so check the plan page for any tethering conditions	Limited to 1 GB per day
Best suited to	Light to moderate users, short trips, Wi-Fi-heavy travellers, budget-conscious planners	Very heavy phone-only users who don’t tether and want no counter
What to monitor	Remaining data in the app	Whether heavy-use days trigger a temporary slowdown
Where to check current prices	Airalo’s Spain plan page	Holafly’s Spain plan page

Cost Shape: Paying for What You Use vs Paying for Peace of Mind

The two models put the cost in different places. With a metered plan, the price grows with the size of the allowance. A small package costs less than a large one, and you only move up if you need more. If your trip is short or you mostly use Wi-Fi, you can often meet your needs with one of the lower rungs of the ladder.

With an unlimited plan, the price grows with the number of days. A longer stay costs more however much data you use. Even on days when you spend the morning in the Prado and the afternoon on a terrace using the bar’s Wi-Fi, you pay the same daily rate. Some people find that reassuring. For many others it means paying for capacity they never use.

I had a cousin visiting from Dublin who spent ten days between Madrid and Segovia. She used surprisingly little mobile data because she was always on Wi-Fi in cafés and the flat. A modest metered package covered her trip with data left over, and she would have spent more on an unlimited plan for the same ten days. Another friend, a photographer, uploaded large image files from the rooftops of Cádiz every evening. She was glad not to be watching a counter. The right answer depends on how you use your phone.

For a detailed breakdown of how cost per gigabyte works across different providers, see Buying an eSIM for Spain: Provider Comparison and Real Cost Per GB.

Hotspot and Tethering

This is where “unlimited” catches out the most people I know. Holafly’s 1 GB per day hotspot limit is easy to miss and important if you plan to share. One gigabyte covers a laptop checking email and some messaging. It does not cover video calls, large file transfers or streaming on a second device. If you are travelling as a couple and plan to hotspot one partner’s phone from the other’s eSIM, that daily cap will run out quickly on any active day.

With a metered plan, shared data comes out of the same allowance you bought, so tethering is just another way of using your gigabytes. Read the specific plan details on the provider’s page before you count on hotspot use. Once confirmed, tethering on a metered plan is easy to budget: buy a larger allowance and share it however you like. There is no separate daily limit on sharing, because every megabyte you share comes off the same total.

If you expect to rely on your phone as a router, especially for a laptop, look closely at how each plan handles it. See Tethering and Hotspot Limits on eSIM Plans in Spain for more detail.

Validity, Top-Ups and Running Out

Metered plans have two clocks running, the data allowance and the validity period. Whichever runs out first ends the plan. If you use your data quickly you will need to top up, and if your trip runs past the validity period you will need to extend. Airalo handles this in the app. You can usually add data to an existing eSIM without reinstalling it, which helps if you are halfway along a coastal road with no Wi-Fi nearby.

Unlimited plans run on days alone. The plan ends when the days you paid for run out, and if you stay longer you will need to buy more days. If you add an unplanned extra week in Granada because you fell for the Albaicín, you have to extend either way.

The practical point for metered users is to top up before you run out, not after. A top-up only takes a moment, but you need some connection to do it. Do it on Wi-Fi in the evening and you will never be stuck. For guidance on whether to extend an existing plan or start a new one, see eSIM Top-Ups in Spain: When to Extend vs Buy a New Plan.

Real Spanish Trip Scenarios

Comparisons in the abstract only go so far. Below are three common trips, each with the data choice that makes sense for it.

A Long Weekend in Madrid

A long weekend in Madrid, say Friday to Monday, is the clearest case for a metered plan. You will probably stay in or near the centre, around Sol, the Barrio de las Letras or La Latina. Your accommodation will almost certainly have Wi-Fi. Museums like the Prado and the Reina Sofía, most cafés and many restaurants have it too. You will use mobile data mainly while walking between places, finding the nearest metro entrance, checking a bar’s opening hours and sending photos to the family group chat.

That adds up to light usage spread over a few days. A small or medium metered package fits it well, and you won’t pay for days or capacity you don’t need. You’ll also have a clear sense of what you used, which is useful the next time you travel. For more on short city breaks and the Madrid metro, How to Use the Madrid Metro as a First-Time Visitor is worth reading before you go.

The one exception is the traveller who wants to stream the football in a park without finding a bar, or who watches long videos on every metro ride. That person would get more out of an unlimited plan. For most weekend visitors to Madrid, though, metered data is the sensible and economical choice.

A Two-Week Rail Loop Through Andalusia

This trip is more varied, and more people get the choice wrong on it. Picture Madrid to Seville on the AVE, then Córdoba, Granada, a detour to Ronda and the white villages, and back. You’ll be on trains a lot and moving between cities every few days. You’ll lean on your phone heavily for logistics: train tickets, platform changes, walking directions through Seville’s maze of streets, and timed-entry tickets for the Alhambra and the Mezquita.

Your usage here is moderate but steady, with some heavier days when you are travelling and away from Wi-Fi. A medium or larger metered package usually works, and a top-up covers you if you use more than planned. You can start with a sensible allowance and add data only if needed, which usually beats paying for unlimited days you may not fill.

Where you are going matters too. The cities are well covered, but some of the mountain roads and smaller pueblos blancos have patchier signal. That affects both types of plan equally, so it’s not a reason to pick one over the other. It’s a reason to download offline maps before you head into the hills. I make sure Google Maps has the Ronda area cached before I leave Málaga, because signal can fade on the winding drive up. Your translation tools should work offline as well, and How to Use a Translation App Offline in Spain explains how to set that up.

A Remote Worker’s Month in Valencia

This is the scenario where unlimited plans look most attractive, and where Holafly’s terms need the closest reading. Imagine someone spending a month in Valencia, renting a flat in Ruzafa and working remotely, perhaps in a coworking space on some days and from the flat on others.

If that person relies on their phone as their only internet connection and does all their work on the phone itself, an unlimited plan can make sense. They have no counter to manage and use it as they need. Most remote work happens on a laptop, though, and that is where the 1 GB per day hotspot limit gets in the way. A full working day of video calls and cloud syncing will use far more than a gigabyte, so tethering a laptop from a Holafly eSIM falls short of what a remote worker needs.

For this traveller, a large metered plan they can tether freely, used alongside the flat’s own Wi-Fi or a coworking connection, often works better. The eSIM becomes a backup and a mobile connection rather than the main office line. Anyone planning to work from Spain should look closely at their connectivity setup. See Mobile Data and eSIMs for Travel in Spain for a wider overview of the options.

Coverage, Speed and Reliability Across Spain

When you choose between these two services, the pricing model is the bigger factor. Coverage still deserves a look, because a cheap plan is worthless if it won’t connect where you are standing.

Big Cities vs the Spanish Countryside

In Madrid, Barcelona, Valencia, Seville, Málaga and Bilbao, coverage is strong and fast with almost any reputable travel eSIM. You will get a usable signal in the metro, along the main avenues and in most buildings. In the cities, which plan you choose makes very little difference to coverage.

Rural Spain is a different picture, and that’s down to geography and network infrastructure, not the brand of your eSIM. Spain is mountainous and in places sparsely populated, and parts of Extremadura, rural Aragón, inland Galicia and the high sierras have weaker signal or none. A travel eSIM uses the towers of the local network it partners with, so it is only as good as that network’s coverage in a given valley. Before you buy, check which local network a plan uses, and then check that network’s coverage for where you’re going.

I learned this driving through the Alpujarras south of Granada, where signal comes and goes as the road winds between villages. No travel eSIM could have changed that. Preparation made the difference: offline maps, downloaded music and a screenshot of my accommodation’s address. For a closer look at the regions where this matters most, see Coverage in Rural Spain: eSIM Networks in Andalusia, Galicia, and Extremadura.

The Islands and the Camino de Santiago

The Balearic and Canary Islands generally have good coverage in towns and resort areas, with weaker spots in remote interior and coastal stretches. The same rule applies there. Check which network the plan uses and look at its coverage map before you commit. If you are hiking in the volcanic interior of Tenerife or exploring quiet coves in Menorca, expect some patches without signal.

The Camino de Santiago needs particular attention. Walking routes like the Camino Francés or the Camino del Norte pass through some well-connected towns and some very remote countryside. Pilgrims depend on their phones to book albergues, check the next stage and stay in touch with home, but they also walk long stretches where Wi-Fi is limited to whatever the evening’s hostel offers. A metered plan suits the Camino well, because pilgrims tend to use data in short bursts rather than streaming. Staying Connected on the Camino de Santiago: eSIM Coverage Across Northern Spain covers the route-specific issues.

When Your eSIM Stops Working

Any eSIM can occasionally misbehave, and nearly always the cause is a settings problem rather than a fault with the service. The most common one is data roaming being switched off for the eSIM line. Travel eSIMs connect to a network outside their home system, so many phones need data roaming enabled on that specific line before any data flows. This trips up people constantly. It catches out first-timers at El Prat as often as anywhere else.

The second most common problem is the phone trying to use the wrong line for data. If you kept your home SIM active for calls and texts, make sure your phone is set to use the travel eSIM for mobile data. Otherwise you may be running up roaming charges on your home line while the eSIM sits idle. Both settings take seconds to fix once you know where to look.

If the settings are right and you still have no connection, restart the phone, toggle airplane mode on and off, and check whether you have used up your data or reached the end of the validity period. Contact the provider’s support only after those checks, and have your plan details ready. For a full troubleshooting routine, see Losing Signal in Spain: Troubleshooting an eSIM That Stops Working.

Setting Up Airalo for Spain Step by Step

For most of the trips above I recommend a metered plan, so here is a practical walk-through of getting Airalo running for Spain. The process is simple, but doing it in the right order saves trouble when you arrive.

Before You Fly

Do the setup at home, on stable Wi-Fi, a day or two before departure. Don’t leave it for the airport gate or the baggage hall. Installing an eSIM needs an internet connection, and a crowded terminal with patchy Wi-Fi is a bad place to depend on one.

1. Check that your phone supports eSIM and is carrier-unlocked. A phone locked to your home carrier may refuse a travel eSIM entirely. eSIM Device Compatibility: Which Phones Work in Spain Before You Buy explains how to confirm this.
2. Download the Airalo app or visit its website, select Spain, and look through the available plan sizes and validity periods on the plan page.
3. Choose a package based on your trip length and honest usage habits, remembering that you can top up later if needed.
4. Install the eSIM by following the on-screen instructions, which usually means scanning a QR code or using a direct install option in the app.
5. Label the new line clearly in your phone settings, for example “Spain Data”, so you can tell it apart from your home SIM.
6. Leave the eSIM switched off for now if the plan activates on first network connection, so it doesn’t start counting before you land.

That last step depends on how a specific plan handles activation, so read the plan’s activation terms. Some plans start their validity period when the eSIM first connects to a supported network, which is why it makes sense to keep it off until you arrive. For a detailed guide to installation and the mistakes people commonly make, see Installing an eSIM Before You Fly to Spain: Step-by-Step and Common Errors.

Landing at Barajas or El Prat

Once the plane is on the ground in Madrid, Barcelona, Málaga or wherever you land, switching on is quick.

1. Turn off airplane mode once you are allowed to.
2. Go to your mobile settings and switch the Spain eSIM line on.
3. Set the eSIM as your line for mobile data.
4. Enable data roaming for the eSIM line specifically, since travel eSIMs usually need it.
5. Wait a moment for the phone to register on a local network, then open a browser or map to confirm data is flowing.
6. If you want your home number available for calls and texts, keep that line active for voice but make sure it is not set as your data line.

That last step gets a lot of people. Leaving your home line as the data line can mean roaming charges while your travel eSIM does nothing. If you want to keep receiving texts on your home number, for example verification codes, Keeping Your Home Number Active While Using an eSIM in Spain explains how to run both lines without surprises.

Once you’re connected, you can open your map and head for the train or taxi rank. From Barajas you can reach the city by metro, airport bus or Cercanías train, and having working data as you walk out of arrivals makes that first hour much easier.

Managing Your Data During the Trip

The one habit a metered plan needs is a quick look at your remaining data now and then. The app shows your balance, and checking it each evening takes seconds. A few other habits will stretch your allowance a long way.

1. Turn off automatic photo and video backup over mobile data, and let it sync on Wi-Fi instead.
2. Set streaming apps to download content on Wi-Fi rather than streaming over mobile data.
3. Download offline maps for each region before you travel through it.
4. Join trusted Wi-Fi at your accommodation, on trains where available, and in cafés to save mobile data for when you really need it.
5. Top up through the app before you run low, ideally on Wi-Fi in the evening, rather than waiting until your data is gone.

None of this means rationing. It means not spending mobile data on background tasks that can wait for Wi-Fi. Once these settings are in place, most travellers find that a sensible metered allowance lasts the whole trip comfortably. If you are travelling as a group, splitting data across several phones is a separate question, covered in eSIM for a Family Trip to Spain: Cheapest Setup for Four Phones.

Which One Should You Choose

With the models, the scenarios and the setup covered, here is how to decide. Neither option is wrong. Each fits a different traveller, and the aim is to match the plan to how you will actually use your phone.

When Airalo Is the Better Buy

For most visitors to Spain, a metered plan is the more economical and flexible choice. Airalo is a strong fit if you are on a short city break, if you will have Wi-Fi at your accommodation and in many of the places you visit, or if your phone use is mainly navigation, messaging, bookings and photos rather than continuous streaming. It also suits travellers who want to tether a laptop or a partner’s phone, because shared data simply comes off the allowance you bought, without the daily sharing limit that applies to Holafly’s hotspot.

The flexibility is the strongest argument for it. You start with a package that fits your expected use and top up only if you need more. That suits trips that change as you go, which most trips in Spain do. Plans grow quickly once you discover how good the food is in Asturias or how easily a day in Granada becomes three. You can adjust your data along with your plans instead of paying in advance for capacity you may not use.

If you are weighing a travel eSIM against walking into a shop to buy a Spanish SIM, that comparison has its own trade-offs. A local SIM can sometimes win on longer stays. Airalo vs a Local Spanish SIM: When Buying Locally Actually Wins sets out when buying locally makes more sense.

When Unlimited Makes Sense

Holafly’s unlimited plans fit a narrower group, and it’s fair to say who that is. If you are a heavy phone-only user who streams a lot, rarely uses Wi-Fi and does all your browsing on the phone itself, not having a counter is useful. You can use your phone freely without thinking about gigabytes.

Two conditions apply, and both come from Holafly’s own Spain page. First, speed may be reduced in rare cases under the network operator’s Fair Usage Policy after heavy use on a given day, for no more than one day, with full speed returning the next day. Second, hotspot sharing is limited to 1 GB per day. If you need to tether a laptop or share with another device for anything more than light use, the unlimited plan won’t do that well. Unlimited suits people whose heavy use stays on the phone itself.

If you are going on to Portugal or Morocco, or across several European countries, the comparison becomes about regional coverage rather than a single-country plan. Europe Regional eSIM Plans: Worth It for a Multi-Country Trip From Spain covers that decision.

Your Final Decision Checklist

Before you buy, go through these questions honestly. Your answers will point you to the right plan.

1. How long is your trip, and will you have reliable Wi-Fi at your accommodation and in many of the places you visit?
2. Do you stream video or music on the go, or mostly on Wi-Fi in the evenings?
3. Will you need to tether a laptop or share data with another device, and if so, how much?
4. Is your phone carrier-unlocked and eSIM-compatible?
5. Does the plan’s partner network cover the specific regions you will visit, especially rural areas, islands or the Camino?
6. Are you comfortable checking your data balance occasionally and topping up when needed?

If most of your answers point to moderate use, regular Wi-Fi access, some tethering and flexible plans, a metered package is likely to serve you better and cost less. For that traveller, I’d suggest choosing a Spain plan from Airalo, installing it at home before you fly and topping up as your trip unfolds. If your answers point to very heavy phone-only use with little sharing, an unlimited plan is worth considering, as long as you accept its fair-use and hotspot conditions.

Whichever you choose, check current prices, plan sizes and terms on each provider’s own page, because those details change. If you are still undecided, start with the Airalo app. Pick the Spain plan that matches your answers above and install it before you leave. Being connected the moment you land in Spain makes the whole arrival easier. And if a friend has shared a referral link with you, read eSIM Referral Credits and Promo Codes: How the Discounts Actually Work to understand how those credits apply before you check out.

Disclaimer

This article is for general informational purposes only and does not constitute professional advice. Laws, prices and regulations vary by location and change over time. Consult a qualified professional for guidance on your specific situation.