Frequently Asked Questions
Why is the return flight always longer than the outbound?
The jet stream flows primarily west to east. Westbound flights fight a powerful headwind, adding 60 to 90 minutes on transatlantic crossings. Eastbound flights ride the same tailwind for a significant speed boost. This effect is most pronounced on the North Atlantic and North Pacific corridors.
What cruise speed should I enter?
Use 900 km/h for most wide-body jets (777, A330, A350, 787), 850 to 875 km/h for narrow-bodies (737, A320), 780 to 820 km/h for regional jets, and 550 to 650 km/h for turboprops. The default preset speed of 900 km/h is appropriate for most long-haul calculations.
Does the layover field include connection time or just the wait?
Enter total layover hours including all time between landing and your next departure. This adds directly to your total journey time. A 2-hour minimum connection on an international itinerary is common, but many travelers pad to 3 hours to account for customs and immigration.
How do I get accurate airport-to-airport distances?
Search for 'great circle distance [airport code] to [airport code]' or use an aviation route distance tool. Great-circle distance is the theoretical shortest path; actual block distances in route planning run 5 to 10% higher. IATA airport codes (three letters) are the standard identifier used by these tools.
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Estimates for informational purposes only.
Important Disclaimer: Estimates for informational purposes only.
This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.