Flight Time Calculator
Estimate a flight's gate-to-gate time from distance and cruising speed.
Estimate how long a flight takes
Enter the great-circle distance and a cruising speed, and it works out time in the air plus a padding for taxi, climb, and descent. Flip it around to back out the distance from a scheduled flight time.
Estimated gate-to-gate time
5h 30m
Time in the air plus your padding
Time cruising
5h
Distance divided by cruising speed
How it works
The core of a flight's length is simple physics: distance divided by speed. A jet cruises around 500 mph (about 805 km/h), so a 2,500-mile hop is roughly five hours in the air. Punch in the great-circle distance between two airports and pick your speed, and that's the airborne time.
Real trips are longer than that, though. You taxi out, wait in line, climb for fifteen minutes, then descend and taxi to the gate. That's why the tool adds a padding you can adjust — thirty minutes is a sensible default for a typical airport. Add the padding to the airborne time and you get a scheduled gate-to-gate estimate.
Flip the tool the other way and it solves distance instead. Give it a scheduled flight time and a cruising speed, it subtracts the padding to find the time actually spent cruising, and multiplies by speed to estimate how far apart the two airports are. Handy when you know the timetable but not the mileage.
Frequently asked questions
Why isn't this just distance divided by speed?
Because a scheduled flight includes more than cruising. You spend time taxiing, holding, climbing to altitude, and descending — none of it at full cruise speed. The padding covers that ground and maneuvering time so the estimate matches the airline's timetable more closely.
What cruising speed should I use?
For a typical commercial jet, 500 mph (about 805 km/h) is a solid default. Regional turboprops are slower, around 300 mph, and a strong jet-stream tailwind can push a long-haul ground speed well above 550 mph, so nudge the number if you know the aircraft or route.
Does it account for headwinds and tailwinds?
Not directly — it uses whatever average speed you enter. Winds are the biggest reason the same route can take 30 to 60 minutes longer one direction than the other. If you're estimating a westbound flight into a headwind, drop the speed a bit; for an eastbound tailwind, raise it.