Buying a SIM at the airport or an eSIM before you fly?
Walk out of arrivals in most big airports and you will find a row of SIM counters. They work, and for some travellers they are the right choice. For most, buying a travel eSIM before you leave home is quicker, and you land already online.
The quick comparison
| Travel eSIM bought before you fly | SIM from an airport counter | |
|---|---|---|
| When you are online | As soon as you land | After the queue |
| ID needed | No | Often your passport |
| Price known in advance | Yes | Only once you are there |
| Your home SIM | Stays in the phone for texts and calls | Taken out, unless your phone has dual SIM |
| Local phone number | No, data only | Usually yes |
| Phone requirements | Supports eSIM and carrier unlocked | Carrier unlocked |
| If it does not work | Message support over airport wifi | Go back to the counter |
Why buying before you fly is easier
- You land connected. Maps, messages and your ride work the moment airplane mode goes off.
- No queue after a long flight, and no passport scan.
- You keep your home number active for bank codes and texts. Our guide on keeping your home number shows how.
- You install on your own wifi, not on a busy arrivals network.
- You can compare properly at home, using a checklist like our guide to choosing a travel eSIM.
When an airport SIM is the better choice
- You need a local phone number, for example for local businesses to call you.
- You are staying for many months and a local monthly plan is much cheaper.
- Your phone does not support eSIM, or is locked to your carrier and cannot be unlocked in time.
If you land without either
You can still buy an eSIM after you land:
- Connect to the airport wifi.
- Use the plan finder, pick your plan and pay.
- Install the eSIM straight away from the link or QR code, while you are still on wifi.
- Follow the landing day checklist to switch it on.
Arrivals wifi can be slow and sometimes needs a sign in page, so find a quiet spot before you start.
Prices, compared fairly
Airport counter prices vary a lot by country and airport. To compare fairly, work out how much data your trip needs with our cost and data guide, then compare the counter's price for that amount with the plan finder's result. For reference, a plan with 1GB or more starts from US$3.60 for Japan and US$3.60 for Thailand (updated 27 Sep 2026).
Prices for popular trips
Cheapest plan with 1GB or more, in US dollars from our catalogue, updated 27 Sep 2026.
Questions travellers ask
Are airport SIM cards more expensive?
Often, though not always. Airport counters sell convenience to people who have just landed. Compare the counter's price for the data you need with the plan finder's result for the same trip before you decide.
Do I need my passport to buy a SIM abroad?
In many countries, yes. Local SIM cards usually have to be registered to an ID, and at an airport that means your passport. A travel eSIM bought online does not need that step.
Can I buy an eSIM after I land?
Yes. Connect to the airport wifi, buy on your phone, and install it straight away. It takes a few minutes, but the arrivals hall wifi is not always fast, so buying at home is easier.
When is a local SIM the better choice?
When you need a local phone number, for example to receive calls from local businesses, or when you are staying for many months and a local monthly plan is much cheaper.