Sometimes. A growing number of airlines offer free Wi-Fi (often via a loyalty-program or carrier partnership), but most still charge, especially on long-haul. Messaging is frequently free even when full internet isn't. Check your airline before you count on it, and download entertainment first.
In-flight Wi-Fi is now common but far from universally free.
Free on some carriers: several airlines have made basic Wi-Fi free, sometimes requiring a (free) loyalty-program sign-up. Policies change often and vary by route and aircraft.
Free messaging, paid browsing: a common middle ground — WhatsApp/iMessage-style messaging is free, full internet is a paid pass.
Paid: most long-haul and many short-haul flights still sell Wi-Fi by the hour, the flight, or the trip. Buying before you fly is sometimes cheaper.
Reality check: even paid Wi-Fi can be slow, and satellite connections drop over oceans and poles. Don’t rely on it for work or streaming.
Best practice: download shows, music, podcasts and offline maps before boarding, and treat any onboard Wi-Fi as a bonus.
Related questions
Can I use my phone on a plane?
Yes, in airplane mode. Most airlines require airplane mode for takeoff and landing; once airborne you can usually turn Wi-Fi and Bluetooth back on if the plane offers them. Cellular calls are still banned on almost all flights. Follow the crew's instructions. Full answer →
How do I survive a long-haul flight?
Choose your seat deliberately, dress in layers, drink water and skip alcohol, walk every two hours, download entertainment in advance, bring your own snacks, and plan sleep around the destination's clock. Compression socks help on flights over eight hours. Full answer →
Airline, airport and government rules change without notice. Treat this as a starting point and confirm with the airline or authority for your specific trip. Request a correction if something is out of date.