Flight Time Calculator

Work out the local arrival time from departure time, flight duration and both time zones.

Departure local date and time	2026-12-20 22:15
Departure UTC offset	1 hours
Flight duration hours	7 h
and minutes	35 min
Arrival UTC offset	4 hours

Departure local date and time

Departure UTC offset

hours

e.g. London winter 0, Paris winter +1, New York winter −5, Dubai +4, India +5.5.

Flight duration hours

and minutes

min

Arrival UTC offset

hours

Arrival local time

2026-12-21 08:50

+1 day. Time zones differ by 3 hours. Arrival in UTC: 2026-12-21 04:50.

About the Flight Time Calculator

Enter the departure date and time, the departure time zone, the flight duration and the arrival time zone. The calculator gives the local arrival time, whether it's the next day, and the arrival time in UTC.

Convert the departure to UTC by subtracting the departure offset, add the flight duration, then add the arrival offset. Remember daylight saving time changes offsets: London is UTC+0 in winter and UTC+1 in summer; New York UTC−5 and −4.

The formula

Arrival local = departure local − offset₁ + duration + offset₂

Worked example

Departing 22:15 on 20 December at UTC+1; flying 7 h 35 min to UTC+4

Departure in UTC: 21:15
Arrival UTC: 04:50 on 21 December
Local arrival: 08:50, the next day

Questions people ask

Why does a flight 'arrive before it left'?

Crossing many time zones westward (or the date line) can do that.

Which duration should I use?

Block time on the ticket includes taxiing.