# Car rental at Spain's airports

> Prices, terms and what to check when renting a car at Adolfo Suárez Madrid–Barajas Airport or Spain's other airports.

Prices, terms and what to check when renting a car at Adolfo Suárez Madrid–Barajas Airport or Spain's other airports.

## Get online at the airport

Install a MerrSIM eSIM for Spain (from €1.49, 10 GB €8.99) before departure and you’re online the moment you land at Adolfo Suárez Madrid–Barajas Airport — no WiFi hunt, no roaming.

[MerrSIM — eSIM Spain](https://merrsim.com/destinations/esim-plans-for-spain)

## Activation in a few minutes

Do the install before departure, while on WiFi. Open your phone settings, choose to add an eSIM and scan the QR code you received by email. Label the profile “Spain” so it is easy to spot. When you land, set the eSIM as your data line and switch on data roaming for it — that is normal for travel eSIMs and adds no fees, because the plan is prepaid. Within seconds you are online, with no need to hunt for public WiFi.

## No registration, no shop queue

Many EU countries require identity verification for local SIM cards, which means a queue, a shop and sometimes even a local address. A travel eSIM skips all of that: it is sold as an international data service, with no passport and no contract. You have it ready before you set off for Spain, so you land and are online immediately — no time wasted at the airport and no risk of surprise roaming bills.

## How much data you really need

For normal use — maps, messaging, social media and the odd video — budget about 300–700 MB a day. A light traveller is fine with 3–5 GB for a week, while anyone doing video calls, streaming or laptop hotspot will want 10–20 GB. In Spain, download offline maps and use hotel WiFi for big downloads; that way a 10 GB plan comfortably lasts two weeks. If you run out, you buy a new plan in the app with no waiting.

## eSIM versus roaming

Roaming with your home carrier can be expensive outside bundles — sometimes several euros per gigabyte, with bills that land after the trip. A local eSIM turns that into a fixed price you know up front: you pay in advance, you know exactly how many GB you have, and there are no hidden fees. For a trip to Spain, that means peace of mind and often a real saving compared with leaving roaming switched on unchecked.

## Common mistakes to avoid

Three mistakes often spoil the start of a trip. First: buying the eSIM at the last minute at the airport, when you have no WiFi to install it — do it at home. Second: forgetting to switch on data roaming for the eSIM line, which makes it look like it is not working. Third: leaving mobile data on your home SIM, which racks up roaming charges. Check these three and your connection in Spain will be trouble-free.

## FAQ

### How do I get online as soon as I arrive in Spain?
Activate a MerrSIM eSIM for Spain (from €1.49, 10 GB €8.99) by QR before departure; you connect automatically at the airport.


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Author: Etnik Beqiri  
Published: 2026-05-28  
Source: https://merrsim.com/en/blog/makina-me-qira-aeroport-spain-en