Flight Hours Planner
How the Flight Hours Planner works
Enter your departure city, departure date and time, and how long the flight is, and this calculator works out your local arrival date and time at the destination — accounting for the time zone difference between the two cities, including daylight saving time on whichever dates are actually in effect. It also shows what time it is at your destination the moment you leave, and what time it is back home the moment you land, so you can see both perspectives at once.
How to calculate your arrival time
Pick a departure city and a destination city, set the departure date and time, then enter the flight duration in hours and minutes. The result updates instantly, showing the local date, time, and time zone abbreviation (like EDT or GMT+1) at both ends of the flight.
The logic behind it is straightforward, even though the result can look surprising: flight duration is elapsed time in the air, and it gets added to your departure instant exactly as entered. What changes is which clock you're reading that new instant against — the destination's, not your departure city's — so the date can roll over, and daylight saving rules are applied separately for whichever city and date they actually affect.
Example — New York to London
A flight leaving New York at 4:30 PM EDT with a 7-hour duration lands in London at 4:30 AM the next day local time — the calculator handles both the time zone shift and the date change from an overnight flight automatically, so you don't have to work out the UTC offset by hand.
Example — Los Angeles to Tokyo
A flight leaving Los Angeles at 11:00 PM local time with an 11-hour duration lands in Tokyo at around 2:00 AM local time two calendar days after departure. Los Angeles and Tokyo are roughly 16 hours apart, so a late-night departure can land on the day after next even though the flight itself only took 11 hours — a good example of how a large time zone shift, not the flight's length, is usually what drives the date change.
Why flight duration and local clock time can look different
The flight duration you enter is the actual elapsed time in the air, and it never changes. What changes is which clock you're comparing it against. A 7-hour flight always takes 7 hours, but the destination's clock can appear to jump forward or backward by more or less than 7 displayed hours, because it's also reflecting the time zone difference between the two cities — and, on some routes and dates, a daylight saving shift in one city but not the other.
Common use cases
- Figuring out what time you'll land before booking a connecting flight or ride
- Telling family or coworkers what time to expect you, in their local time
- Planning around overnight flights that cross several time zones
- Comparing flight options that depart at different times but land at similar local times
Important limitations
This calculator works entirely from the flight duration and departure time you enter — it doesn't look up real airline schedules, gate times, routes, or delays. It has no way of knowing whether your specific flight is on time, early, or delayed; if your schedule changes, adjust the departure time or duration and recalculate to get an accurate local arrival time from the updated numbers.
Frequently asked questions
What time will my flight arrive locally?
Enter your departure city, date and time, and the flight duration — the calculator adds the duration to your departure time and converts the result into the destination's local time zone.
Does the calculator account for time zones?
Yes. Every result is calculated using each city's real time zone rules, not a fixed offset, so the local time shown is accurate for the specific date you're flying.
Does it account for daylight saving time?
Yes — the offset used for each city is recalculated for the actual date in question, so a flight that crosses a daylight saving transition in either city still produces the correct local arrival time.
Can my arrival date be different from my departure date?
Yes. An overnight or long-haul flight can land a day, or even two, after it departed, and the calculator shows the correct arrival date alongside the arrival time rather than assuming same-day arrival.
Why does a 7-hour flight not look like 7 hours on the clock?
Elapsed time and clock time are different things once you cross time zones — the 7 hours in the air are real, but the destination clock also reflects the time zone gap between the two cities.
Does this include airport delays?
No. The calculator uses the flight duration you enter, not real airline schedule or delay data — if your flight is delayed, update the departure time or duration and recalculate.