How accurate is the flight time estimate?

This is a neutral planning baseline using great-circle distance, an aircraft-category cruising speed and a 30-minute allowance. Real schedules vary with winds, routing, aircraft subtype, congestion and airline padding.

What is great-circle distance?

A great circle is the shortest path between two points on a sphere (the Earth). Airlines roughly follow this path, which is why long-haul flights arc over the poles on a flat map. The Haversine formula is used to compute this distance accurately from latitude/longitude coordinates.

Why is a 30-minute buffer added?

Commercial flights spend time taxiing, taking off, climbing to cruise altitude, descending, and landing. This ground time averages about 20–35 minutes total and is not included in the airborne cruising calculation, so a 30-minute buffer provides a more realistic block time estimate.

Does this account for the jet stream?

No — the tool gives a neutral baseline estimate. Eastbound transatlantic and transpacific flights are often 30–90 minutes faster than the same route westbound due to prevailing jet stream winds.

Can I use city names instead of airport codes?

Yes. The dropdown lists both the IATA airport code and the city name. Use the browser's built-in search or scroll to find your airport.

Flight Time Estimator

Choose two airports and an aircraft category to estimate block time, great-circle distance and a practical duration range.

Route Details

Departure Airport

Arrival Airport

Aircraft Category

Popular Routes

Select departure and arrival airports, then click Estimate.

Total Flight Time

Miles (GC)

Kilometers (GC)

Planning Range

Time Breakdown

Phase	Duration

Great-circle distance: nautical miles. Actual route, wind and schedule can move the result outside the displayed range; verify the airline schedule for travel plans.

Summary

Choose two airports and an aircraft category to estimate block time, great-circle distance and a practical duration range.

How it works

Select or search for your departure airport from the list.
Select or search for your arrival airport.
Click "Estimate Flight Time" to calculate.
The tool computes the great-circle distance between the two coordinates.
Flight duration is derived from distance divided by the selected aircraft speed, plus a 30-minute block-time allowance.
Pick from popular preset routes for instant one-click estimates.

Use cases

Quickly plan how many hours to block for a trip before checking airline schedules.
Compare flight durations across multiple destination pairs.
Estimate layover feasibility when building a multi-stop itinerary.
Check whether a direct flight is faster than a connecting route.
Understand approximate flight times for lesser-served city pairs.
Help kids understand geography by exploring distances between world cities.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu