Flight Speed — How Fast Is Your Plane?
Wondering how fast your plane is flying? If your phone can hold a GPS signal by the window, this tool shows your real ground speed in km/h, mph or knots. Free, nothing uploaded.
Wait for a stronger GPS signal for an accurate time.
Tap Start and allow location. Works best outdoors with a clear view of the sky. Your location stays on your device — nothing is uploaded.
More speedometer options
Frequently asked questions
Can I really check my plane's speed?
From a window seat, if your phone keeps a GPS signal, this shows your ground speed. Note that many airlines ask you to keep devices in flight mode — GPS itself is a receiver and usually allowed, but always follow the crew's instructions. Everything runs in your browser — your location never leaves your device.
How fast do planes fly?
Commercial jets cruise around 800–900 km/h (about 500–560 mph, or 430–490 knots). Takeoff is roughly 250–290 km/h. GPS shows your speed over the ground, which also includes any tailwind or headwind.
Why is knots useful here?
Aviation uses knots as standard, so tap the knots unit to see speed the way pilots do.