Seoul to Denver
12h 48m The flight from Incheon International Airport (ICN) to Denver International Airport (DEN) covers 9,960 km (6,189 miles) and takes approximately 12h 48m gate to gate for a typical jet.
The route heads north-east on an initial great-circle bearing of 37°, passing near 61.6° N, 171.1° W 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 | 18h 07m | 18h 32m |
| Narrowbody jet (A320, 737) | 780 km/h | 12h 46m | 13h 11m |
| Widebody jet (777, 787, A350) | 900 km/h | 11h 04m | 11h 29m |
| Private jet (Gulfstream) | 850 km/h | 11h 43m | 12h 08m |
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
| ICN | DEN | |
|---|---|---|
| Airport | Incheon International Airport | Denver International Airport |
| City | Seoul | Denver |
| Country | South Korea | United States |
| ICAO | RKSI | KDEN |
| Coordinates | 37.4691, 126.451 | 39.86, -104.6738 |
| Elevation | 23 ft | 5,431 ft |
Questions
How long is the flight from Seoul to Denver?
A non-stop flight from Seoul (ICN) to Denver (DEN) takes about 12h 48m. The great-circle distance is 9,960 km (6,189 miles, 5,378 nautical miles), flying north-east on an initial bearing of 37°.
How far is Seoul from Denver?
9,960 kilometres in a straight line over the earth's surface — 6,189 miles or 5,378 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 ICN and DEN?
This page calculates the direct-line time and distance; it does not track airline schedules. At 9,960 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 12h 48m 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.
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.