ICN to SEA Route Guide
Seoul, South Korea → Seattle, United States
Quick answer
RKSI (Seoul, South Korea) to KSEA (Seattle, United States) is a 4,522 NM (8,375 km / 5,204 mi) great-circle route with an initial bearing of 41° (NE). Typical cruise altitude FL410, expected flight time 9h 55m, common aircraft: Boeing 777-300ER, Airbus A350-900, Boeing 787-9.
Distance
4,522 NM
8,375 km / 5,204 mi
Initial Bearing
41° (NE)
True heading at departure
Typical Cruise
FL410
41,000 ft
Block Time
9h 55m
Typical jet, no wind correction
Fuel Estimate
15,066 kg
Single-aisle equivalent + reserve
Departure Elevation
23 ft
RKSI
Arrival Elevation
433 ft
KSEA
What aircraft fly this route?
For a 4,522 NM mission, operators typically deploy:
- Boeing 777-300ER
- Airbus A350-900
- Boeing 787-9
- Airbus A330-900neo
Weather considerations
Pilots flying ICN-SEA should brief METARs and TAFs at both ends, plus any en-route SIGMETs. On this long-range mission, plan for an alternate within fuel reserves and review oceanic / NAT track procedures if applicable.
Frequently asked questions
What is the distance between ICN and SEA?
4,522 nautical miles (8,375 km / 5,204 statute miles) great-circle.
How long is the flight from Seoul to Seattle?
Approximately 9h 55m block-to-block for a typical commercial jet, depending on aircraft type and winds.
What aircraft typically fly ICN-SEA?
Common types include Boeing 777-300ER, Airbus A350-900, Boeing 787-9, Airbus A330-900neo depending on operator and demand.
What altitude do flights cruise at?
Most flights at this distance cruise around FL410 (41,000 ft), though winds and traffic affect filed altitude.
What initial heading is the route?
41° true (NE). Track varies along the route due to great-circle curvature.
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