How in-flight Wi-Fi works
Airplane Wi-Fi reaches the ground one of three ways. Air-to-ground (ATG) systems talk to cell towers below the flight path — cheap to run, but slow, and useless over oceans. Geostationary satellite (GEO) systems connect to satellites parked 36,000 km above the equator — coverage almost everywhere, but the signal's round trip adds noticeable lag. The newest option is low-Earth-orbit (LEO) constellations like Starlink, whose satellites fly a few hundred kilometers up: latency drops from ~600 ms to under 50 ms, and speeds start to feel like home broadband.
The hardware — antenna, radome, modems, cabin access points — is bolted onto each individual aircraft during a retrofit that takes the plane out of service. That's why a single airline can simultaneously operate Starlink-equipped jets, older GEO-equipped jets, and jets with no Wi-Fi at all. Connectivity is a property of the airplane, not the route, the airline, or the flight number.
Who actually provides the Wi-Fi
The name on the Wi-Fi login portal is usually not the airline. As of mid-2026, a handful of providers dominate:
- Starlink (SpaceX) — the LEO disruptor. Roughly 40 airlines have signed on, including United, Air France, Qatar Airways, British Airways and the Lufthansa Group, with retrofits running fleet-by-fleet through 2026–2027. Fast, low-latency, and usually offered free.
- Viasat (which absorbed Inmarsat in 2023) — the largest GEO incumbent; powers Wi-Fi on Delta, JetBlue, American and many others.
- Intelsat (now part of SES) — GEO and multi-orbit service, known for the 2Ku antenna found on many North American fleets.
- Panasonic Avionics and Thales — full-cabin integrators that bundle connectivity with seat-back entertainment, common on long-haul widebodies.
- Anuvu — connectivity and entertainment for carriers like Southwest.
- Amazon Leo (formerly Project Kuiper) — the next LEO entrant; Delta and JetBlue have committed to it as their answer to Starlink.
The industry trend is "multi-orbit": combining GEO coverage with LEO speed, so the system your flight uses can even differ by region of the world.
Tracking the Starlink wave: see which airlines have it live, which are mid-retrofit, and which just signed — in the Starlink airlines tracker →Free or paid? It depends on the airline — and the plane
In-flight Wi-Fi is drifting toward free, but unevenly. The common model is free with a (free) loyalty-program login: United offers Starlink Wi-Fi free to MileagePlus members, Air France to Flying Blue members, Delta to SkyMiles members. Qatar Airways offers Starlink free to everyone on equipped aircraft. Other carriers still charge per flight, per hour, or per megabyte — and a few quietly run both models at once, because only part of their fleet has been retrofitted.
That last point is the catch in every "airlines with free Wi-Fi" list: the offer applies to equipped aircraft. Whether YOUR flight has it depends on the plane. Here's what PlaneFi's research currently shows across the airlines we track:
Free/paid split across Wi-Fi-equipped aircraft we track, based on PlaneFi research and traveler reports; updated continuously. Click an airline for its full fleet breakdown.
Why the same flight number has Wi-Fi one day and not the next
A flight number is a schedule, not an airplane. EK238 today and EK238 tomorrow can be two different physical aircraft — airlines swap tails constantly for maintenance, delays, and fleet rotation. During a retrofit program this matters enormously: an airline "with Starlink" might have it on 60% of the subfleet that flies your route. One day you get 200 Mbps; the next day, nothing.
That's why PlaneFi tracks Wi-Fi per tail number — the registration painted on each aircraft — instead of per airline. Enter your flight number and date in the checker at the top of this page, and we resolve which physical airplane is assigned and what's actually installed on it.
How to check Wi-Fi before you fly
- Look up your flight. Use the checker above — flight number plus date. Tail assignments usually firm up within a day or two of departure, so check again close to your flight if it's not resolved yet.
- Find the tail number yourself. It's often on your boarding pass or the airline's app after check-in, on flight-tracking sites, or painted near the rear door as you board. Then search it on the PlaneFi homepage.
- Browse your airline's fleet. Every airline page on PlaneFi shows which aircraft types — and which individual tails — have Wi-Fi: see the airline directory.
- Know how to connect. Some airlines need a few steps before takeoff (apps downloaded, accounts created). We keep setup guides for Delta and United.
Flight Wi-Fi FAQ
Is airplane Wi-Fi free?
Increasingly, yes — but usually behind a free loyalty-program login (United MileagePlus, Air France Flying Blue, Delta SkyMiles), and only on aircraft that have been retrofitted. Airlines mid-rollout charge on some planes and not others, which is why checking your specific aircraft matters more than checking the airline's policy.
Can I stream Netflix or YouTube on plane Wi-Fi?
On LEO systems like Starlink — yes, comfortably; speeds routinely support HD streaming on a full cabin. On older GEO or air-to-ground systems, usually not: bandwidth is shared by the whole cabin and many airlines block streaming outright on those systems, or sell it as a premium tier.
Does flight Wi-Fi work over the ocean?
Satellite systems (GEO and LEO) work over oceans; air-to-ground systems don't — they need cell towers below. Some aircraft carry both and switch mid-flight, so brief dead zones on long-haul routes are normal. Polar routes can still have gaps depending on the satellite network.
Why is in-flight Wi-Fi so slow sometimes?
Three usual reasons: the aircraft has an older GEO or ATG system with high latency and limited bandwidth; the whole cabin is sharing one connection; or you're in a congested region or coverage edge. Same route, different plane, completely different experience — it's the equipment on the tail, not the airline.
Can I use WhatsApp or iMessage during the flight?
Often yes, even on paid systems — many airlines offer a free or cheap messaging-only tier, since text messaging uses almost no bandwidth. Calls are a different story: most airlines block voice and video calls as policy, even where the connection could handle them.
Not sure whether to trust a Wi-Fi listing? See how to tell a reliable source from a generated one.