Travel time

Flight Duration Calculator

Enter the local departure and arrival times from your ticket with each city's time zone to get the actual time in the air. Or pick two airports to estimate the distance and flight time.

—Flight duration
—Time zone difference
—Date change

Calculated on your device with your browser's time zone data. Nothing is uploaded.

How to use the flight duration calculator

  1. Choose a modeUse schedule mode if you have a ticket, or airports mode to estimate.
  2. Enter times and zonesType the local departure and arrival times and pick each city's time zone.
  3. Read the durationSee the real flight time, the time zone difference and any date change.

Why flight times look strange across time zones

Airline schedules list departure and arrival in local time, so a flight that leaves New York at 7 pm and lands in London at 7 am looks like 12 hours but actually takes about 7. The calculator converts both local times to UTC using your browser's time zone database, which includes daylight saving rules, then subtracts them. Airports mode measures the great-circle distance between two airports and estimates the time in the air at an average of about 500 mph (805 km/h), plus 30 minutes for taxi, climb and descent. Real times vary with jet-stream winds, routing and air traffic.

Eastbound vs westbound

Flights heading east across the Atlantic or Pacific often ride the jet stream and can be an hour or more faster than the return leg.

Crossing the date line

Flights over the Pacific can land "before" they left, or skip a day. Converting to UTC always gives the true duration.

Flight Duration Calculator FAQ

How do I calculate flight time with time zones?

Convert the departure and arrival times to UTC (or one common time zone) and subtract. The calculator does this automatically, including daylight saving.

Why does my flight arrive the next day?

If you cross several time zones going east, or the International Date Line going west, the local arrival date can be a day later (or earlier) than the departure date.

How accurate is the airport estimate?

It's usually within about 30 to 45 minutes of scheduled block times. Winds and routing cause the difference.

What time zone names are supported?

All IANA time zones your browser supports, such as America/New_York, Europe/London and Asia/Tashkent.

Is the airport list complete?

No. It includes 45 major hubs. For any other airport, use schedule mode with the city's time zone.

Try other free tools

More handy calculators from My Panda Toolbox.

ZZZJet Lag PlannerShift your sleep before a long trip FUELGas Trip Cost CalculatorFuel cost of a road trip, split per person TZWorld Clock & Timezone ConverterCompare times across cities side by side CO2Carbon Footprint CalculatorYearly CO2 from travel, energy and diet