London to Seoul
11h 26m The flight from London Heathrow Airport (LHR) to Incheon International Airport (ICN) covers 8,861 km (5,506 miles) and takes approximately 11h 26m gate to gate for a typical jet.
The route heads north-east on an initial great-circle bearing of 40°, passing near 64.9° N, 76.6° E at its midpoint.
The route
The great-circle path — the shortest line between the two airports across the curve of the earth. On a flat map it looks bent; on a globe it is straight.
Flight time at different cruise speeds
Aircraft type, winds and routing all move the real number. This is the same distance flown at different speeds, plus the 25-minute ground and climb allowance.
| Typical of | Cruise speed | Airborne | Gate to gate |
|---|---|---|---|
| Turboprop / regional | 550 km/h | 16h 07m | 16h 32m |
| Narrowbody jet (A320, 737) | 780 km/h | 11h 22m | 11h 47m |
| Widebody jet (777, 787, A350) | 900 km/h | 9h 51m | 10h 16m |
| Private jet (Gulfstream) | 850 km/h | 10h 25m | 10h 51m |
Headwinds on an eastbound long-haul routinely add 30–60 minutes; the same route westbound can be quicker. Airlines publish schedules with padding built in.
Both airports
| LHR | ICN | |
|---|---|---|
| Airport | London Heathrow Airport | Incheon International Airport |
| City | London | Seoul |
| Country | United Kingdom | South Korea |
| ICAO | EGLL | RKSI |
| Coordinates | 51.4707, -0.4599 | 37.4691, 126.451 |
| Elevation | 83 ft | 23 ft |
Questions
How long is the flight from London to Seoul?
A non-stop flight from London (LHR) to Seoul (ICN) takes about 11h 26m. The great-circle distance is 8,861 km (5,506 miles, 4,785 nautical miles), flying north-east on an initial bearing of 40°.
How far is London from Seoul?
8,861 kilometres in a straight line over the earth's surface — 5,506 miles or 4,785 nautical miles. Actual flown distance is usually 2–5% longer because aircraft follow airways, avoid weather and route around restricted airspace.
Is there a non-stop flight between LHR and ICN?
This page calculates the direct-line time and distance; it does not track airline schedules. At 8,861 km the route is comfortably within range of a non-stop service if an airline chooses to fly it. Check an airline or booking site for what is actually scheduled.
What should I expect on a 11h 26m flight?
Anything past six hours is a long-haul flight: expect at least one meal service, a significant time-zone shift, and enough sitting that circulation and hydration start to matter. Cabin altitude, dry air and disrupted sleep do more damage to a training routine than the flight itself.
Other routes from London
Airport coordinates from OurAirports (public domain). Distance is a great-circle calculation; flight time uses the model described on the method page. Flight times are great-circle estimates for planning only — always check the airline's published schedule.