Date calculators · Travel & booking
Layover Calculator
Check multiple flight connections using dated local arrivals and departures. Convert time zones and subtract your connection and transfer allowances.
Your calculation
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Choose your dates.
Select your counting rules and calculate.
Calculation details
| Step | Value |
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How to use this calculator
For each connection, enter full local dates, times and IANA time zones. Add required connection minutes and any extra terminal or airport transfer allowance.
The tool converts both boundaries to instants before subtracting. Nonexistent local times are rejected; repeated times need an explicit occurrence choice. Separate rows can use different arrival and departure zones. Each connection is limited to seven elapsed days.
A worked example
An 08:00 arrival and 11:00 departure in London leave 180 minutes. Subtracting a 90-minute connection allowance and 30-minute transfer leaves 60 minutes spare.
Does enough calculated time guarantee I can make the flight?
No. Boarding deadlines, baggage, security, terminals and booking conditions vary. Enter the allowances you have confirmed; the result is a comparison, not an airline connection approval.
Further reading: Source workflow and conventions. Your entered rules determine this result.
Which calendar and years are supported?
Use Gregorian dates from 1900 through 2100, with results inside that range. Most daily plans are limited to 366 dates; academic terms and sprint plans allow up to 731. Forms limit the number of entries to keep calculations responsive. Holidays and policy rules come from your inputs. Date-only plans ignore DST; tools with time-zone inputs use the browser's time-zone data and explicitly resolve repeated times. Calendar exports preserve date-only markers or exact timed events as appropriate. Calculations run only when requested, without background polling.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.