This is an estimate. The math is great-circle distance divided by a typical jet cruise speed (880 km/h, 547 mph) plus 30 minutes for taxi, takeoff, and landing. Real flights vary — winds aloft can add or shave 20+ minutes on long-haul, ATC routings rarely fly the exact great circle, and slot constraints at hubs like LHR or LGA stretch taxi time. Use it for back-of-the-envelope planning, not for booking a connection.
The Flight Time Calculator answers the question airline booking sites bury: how long is that flight, and what time will I actually land? Pick a departure city, a destination, a date, and a local departure time. The math is great-circle distance (the shortest path on Earth's surface) divided by a typical jet's cruise speed, plus a 30-minute pad for taxi, takeoff, and landing. The arrival time accounts for the destination timezone — including daylight saving — so a 09:00 New York flight to London lands at the correct evening BST clock, and a Tokyo-to-LA flight correctly arrives before it left in local time.
Pick your departure airport from the From dropdown. We list 150+ major airports worldwide by IATA code (JFK, LHR, NRT, etc.) — pick the closest hub if your exact airport isn't listed.
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Pick your destination from the To dropdown. Same list.
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Set the departure date and the local departure time at the origin. Use the wall-clock time the airline would show — 14:30 means 2:30 PM at the origin city, not your home timezone.
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Read the headline flight time. The breakdown shows great-circle distance in km and miles, the air-time portion, and the 30-minute ground pad we added.
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Read the arrival card. It shows the local clock time at the destination, the destination weekday, and a +1d or +2d badge if you cross the international date line or fly overnight.
