Flight Duration & Jet Lag Direction Calculator
Processed in your browser
Calculate flight duration across departure/arrival timezones and estimate jetlag recovery days.
Actual Airborne Duration
7.0 Hours
Jet Lag Recovery Estimate
~5 Days (Eastward)
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Direct In-Browser Handoff
Date Duration & Calendar Math Pipeline
Chain this tool with complementary private browser utilities for a complete zero-server workflow:
Helpful Examples
Transatlantic Flight
NYC to London flight duration
NYC -> LondonHow to Use the Flight Duration & Jet Lag Direction Calculator
Compute true airborne elapsed flight time taking timezone offsets and daylight saving times into account. Estimates circadian jetlag recovery time based on eastward vs westward flight directions.
Privacy & Data Processing Notice
No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.
Frequently Asked Questions
Why is eastward jetlag harder to recover from than westward?
Flying east shortens your day, requiring you to fall asleep earlier (phase advance), which is biologically harder for the human circadian clock than staying up later (phase delay).
How many days does jetlag recovery take?
A common medical rule of thumb is approximately 1 day per time zone crossed traveling east, or 1 day per 1.5 time zones traveling west.
Related Utilities
Frequently paired browser tools in Date & Time Tools