Wondering "Can I use mobile data on a plane?" or "If I've got an eSIM installed, will it work in the air?" Here's the short answer first: while you're flying, mobile networks (4G/5G) — including eSIMs — won't connect. If you want to get online during the flight, you use the in-flight Wi-Fi that the aircraft provides. Where an eSIM really shines is after you land, once you've arrived at your destination. In other words, think of it as two separate jobs — "on the plane = in-flight Wi-Fi" and "after landing = eSIM" — and you'll know exactly what to set up. This article walks through why that is, how to set each one up, and how the two differ.
The Bottom Line: No eSIM in the Air — Use In-Flight Wi-Fi, and Save the eSIM for After You Land
Mobile networks (eSIM and physical SIM alike) work by exchanging signals with cell towers on the ground. Inside an aircraft cruising high above, your phone can't reach those towers, so even with an eSIM installed you won't have mobile data in the air. If you really need to get online mid-flight, you use the aircraft's built-in in-flight Wi-Fi (available only on flights that offer it). An eSIM, on the other hand, is ready to go once you've landed and arrived: switch the line on and you can be online from the arrival hall or on the move. You can browse eSIMs for your destination on our eSIM comparison page. If you'd rather compare all your connectivity options at a glance, take a look at our guide to staying connected abroad too.
Why Doesn't an eSIM (Mobile Network) Connect on a Plane?
Your phone's mobile network sends and receives signals to and from cell towers (antennas) on the ground. A plane flies fast at roughly 10,000 meters, far beyond the reach of those ground-based towers, so a stable connection isn't possible. On top of that, you're asked to switch on airplane mode in the cabin — including during takeoff and landing — so that signal-emitting devices don't interfere with the aircraft's instruments. Airplane mode temporarily turns off the mobile network, Wi-Fi, and Bluetooth, and your eSIM is offline during that time too.
This isn't an eSIM-specific limitation — a physical SIM behaves exactly the same way. It helps to remember that the mobile network itself simply doesn't work at cruising altitude.
In-Flight Wi-Fi vs. eSIM at a Glance
Both are ways to get online, but where they work and how they work are different. Here's a simple breakdown.
| Item | In-Flight Wi-Fi | eSIM (mobile network) |
|---|---|---|
| Where it works | On the plane (flights that offer it) | On the ground after landing (in covered areas) |
| How you connect | Turn Wi-Fi on while in airplane mode | Turn on mobile data after you arrive |
| Who provides it | The airline (varies by flight and aircraft) | Your eSIM provider |
| How pricing works | Varies by flight, route, and plan (free or paid) | Chosen by data amount and number of days at your destination |
| Typical speed | Shared among many passengers, so it can fluctuate | Depends on the local network, area, and congestion |
Whether in-flight Wi-Fi is available, what it costs, and how fast it is vary widely by airline, route, and aircraft (as of June 2026). Check the airline's latest information for the specific flight you plan to take. It's also worth confirming in advance whether your phone supports eSIM with our eSIM compatibility checker.
How to Get Online During a Flight (Airplane Mode + Wi-Fi Setup)
On flights that offer in-flight Wi-Fi, you can stay in airplane mode and turn on just Wi-Fi to get online. The steps generally look like this.
The Basic Flow on iPhone and Android
- Before takeoff, follow the announcements and turn on airplane mode.
- Leave airplane mode on, then turn only Wi-Fi back on from Settings or the Control Center.
- Select the in-flight Wi-Fi network name that appears and connect.
- Complete sign-up and payment on the page that opens automatically (or the specified site).
The key point: airplane mode doesn't mean "all connectivity is blocked." You can keep airplane mode on and switch Wi-Fi back on afterward. If the sign-in page doesn't appear or you can't connect, our connection troubleshooting guide covers the common fixes.
How to Switch Your eSIM On After Landing
Once you arrive, it's the eSIM's turn. If you install your eSIM before you leave, all you have to do after landing is switch it on for a smooth start.
The Basic Steps After You Arrive
- Before you travel — somewhere with a stable connection, such as at home or at the airport — install your eSIM.
- After landing, once you no longer need in-flight Wi-Fi, turn off airplane mode.
- In Settings, turn on mobile data for your eSIM (your destination plan).
- Turn on data roaming if needed, and set the APN if one has been provided.
- Check that you have signal bars and that you're online.
The timing for installing and activating an eSIM can vary by plan. You can find the specific steps after purchase in our eSIM setup guide. As a rule, installation should be done where you have an internet connection, so to avoid a failed QR-code scan in the cabin, we recommend getting it done before you depart.
Things to Keep in Mind with In-Flight Wi-Fi and eSIMs
Knowing how it all works helps you avoid hiccups on the day.
- Not every flight has in-flight Wi-Fi: short-haul routes and some aircraft may not offer it. Check the details for your specific flight in advance.
- Don't expect too much from speed or stability: because it's shared among many passengers, it can slow down when busy and may not be well suited to data-heavy use like streaming long videos.
- Don't forget to turn airplane mode back off: if you forget to switch it off after landing, your eSIM won't connect and it's easy to panic and think something's broken. Check airplane mode first.
- eSIMs are generally data-only: like many travel eSIMs, Bloomy plans are data-only — no phone number, no SMS, and no voice calls over the cellular network. If you need calls tied to a phone number or SMS-based verification, look into a separate option as well (such as a local plan with a number, or keeping your usual number active). App-based calls like WhatsApp may work wherever you have a usable data connection.
If you'd like to understand a bit more about how numbers and SMS are handled, see our articles on phone numbers and SMS.
Set Up an eSIM for Your Destination with Bloomy
In-flight Wi-Fi only gets you online "on the plane" — staying connected once you arrive is something you need to arrange separately, and that's exactly where an eSIM comes in. With Bloomy, you choose a plan to match your destination, data amount, and length of stay. Prices, data amounts, and supported countries can change, so check the latest details on our eSIM comparison page (as of June 2026), and confirm the current price at the time of purchase. For longer stays or when it's hard to predict how much you'll use, an unlimited-style plan such as Bloomy Unlimited Max can be a good option. Unlimited plans suit extended use, but a fair use policy, reduced speeds after a certain amount of use, or tethering conditions may apply, so it's worth checking the current terms before you buy. Just keep in mind that "unlimited" doesn't mean usage with no conditions at all, and that actual connection quality depends on the local network, your device, and the area you're in.
If this is your first time, start by confirming whether your device supports eSIM, and finish the setup before you depart — that way you can be online as soon as you land.
Frequently Asked Questions (FAQ)
Here are some of the questions we hear most often about in-flight Wi-Fi and eSIMs.
