TimezoneCalculator

Travel time calculator

Booking times are local. This turns them into real durations, connection gaps and a door-to-door total.

Your itinerary

Loading local copy…

Enter times exactly as printed on your booking (local times at each airport or station). No flight data is looked up.

  1. Departs
    Arrives

    7 h 0 min

    Clocks: 21:00 UTC-04:00 to 09:00 UTC+01:00; local clock difference 5 h 0 min.

  2. Connection: 1 h 15 min

    Departs
    Arrives

    9 h 0 min

    Clocks: 10:15 UTC+01:00 to 23:45 UTC+05:30; local clock difference 4 h 30 min.

    Connection shorter than your 90-minute minimum.

Door to door: 17 h 15 min from Mon 1 Jun 2026 to Tue 2 Jun 2026 (local dates).

Minimum connection is your own assumption; airlines and airports set their own rules. The CSV keeps your local entries and the exact UTC instants.

Local times in, real durations out

A flight leaving New York at 21:00 and landing in London at 09:00 the next day takes seven hours, not twelve: London clocks are five hours ahead. Enter each departure and arrival exactly as printed, with the airport’s zone, and the calculator converts both ends to instants before subtracting.

It also checks chronology: an arrival before its departure, or a connection that leaves before you land, usually means a date was typed wrong. Connections shorter than the minimum you set are highlighted. No flight data is looked up and nothing is guaranteed about real schedules.

Questions

What about crossing the date line?

Handled automatically: an arrival dated the previous day is fine as long as the instants are in order.

Is my itinerary uploaded?

No. Legs are saved only in this browser and can be exported as CSV.