# How to check in at Sofia Airport (step by step)

> Check-in, security and gate at Sofia Airport (SOF) without stress. Here are the steps and how much time to leave.

Check-in, security and gate at Sofia Airport (SOF) without stress. Here are the steps and how much time to leave.

## Steps

- Check in online 24–48h before your flight
- Arrive at Sofia Airport 2h early (3h for long-haul)
- Clear security: liquids ≤100ml
- Find your gate on the screens or Google
- Keep your boarding pass on your phone — the eSIM keeps you online

## Get online at the airport

Install a MerrSIM eSIM for Bulgaria (from €1.99, 10 GB €9.99) before departure and you’re online the moment you land at Sofia Airport — no WiFi hunt, no roaming.

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

## 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 “Bulgaria” 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.

## Does your phone support eSIM?

Before you buy, check two things. First, the phone must be eSIM-compatible: iPhone XR/XS and newer, Samsung Galaxy S20 and newer, Google Pixel 3 and newer, and many recent Motorola, Huawei and Oppo models. Second, it must be carrier-unlocked. You can verify by dialling *#06# — if an EID number appears, your phone supports eSIM. This saves you any surprises when you arrive in Bulgaria.

## Tips to save data

A few small habits make your gigabytes last in Bulgaria. Download Google Maps offline before you head out, set video quality to “Auto” or 480p, and turn off background app refresh. Use hotel WiFi for big updates and high-resolution photo uploads. With these steps, even a modest plan covers the whole trip, and your hotspot stays free for the moments you really need it.

## 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 Bulgaria will be trouble-free.

## 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 Bulgaria, that means peace of mind and often a real saving compared with leaving roaming switched on unchecked.

## FAQ

### How do I get online as soon as I arrive in Bulgaria?
Activate a MerrSIM eSIM for Bulgaria (from €1.99, 10 GB €9.99) 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/check-in-sof-en