Seoul (ICN) to Seattle (SEA)
Flight time
≈ 11h 12m
Bearing
41° NE
Seoul (ICN) to Seattle (SEA) is 5,203 miles (8,373 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies ICN–SEA
US DOT T-100 · filed dataIn April 2026, Delta Air Lines operated the most departures, one of 6 carriers flying nonstop ICN–SEA; the Airbus A350-900 was the most common aircraft at 47% of departures; flights ran 83% full.
Departures
222
April 2026
Seats
68,205
both directions
Passengers
56,825
both directions
Load factor
83.3%
passengers ÷ seats
Who flies ICN–SEA?
Delta Air Lines operated the most nonstop ICN–SEA departures in April 2026 (66), one of 6 carriers on the route.
- DL
66 departures · 19,361 seats
Share of departures29.7%80.5%
Load
- KE
Korean Air
60 departures · 19,500 seats
Share of departures27.0%87.2%
Load
- AS
52 departures · 15,600 seats
Share of departures23.4%76.2%
Load
- OZ
Asiana Airlines
42 departures · 13,062 seats
Share of departures18.9%92.8%
Load
- 5Y
1 departures · 189 seats
Share of departures0.5%0.0%
Load
- PR
Philippine Airlines
1 departures · 493 seats
Share of departures0.5%46.9%
Load
What plane flies ICN–SEA?
In April 2026, the Airbus A350-900 flew 47% of ICN–SEA departures — more than any other aircraft type.
- Airbus A350-900
104 departures · 88.2% load
46.9% - Boeing 787-10
60 departures · 87.2% load
27.0% - Boeing 787-9
52 departures · 76.2% load
23.4% - Airbus A330-300
2 departures · 0.0% load
0.9% - Boeing 767-400ER
2 departures · 0.0% load
0.9% - Boeing 747-400
1 departures · 0.0% load
0.4% - Boeing 767-300
1 departures · 0.0% load
0.4%
How has ICN–SEA traffic changed?
Nonstop ICN–SEA departures rose from 186 in May 2025 to 222 in April 2026.
Monthly nonstop ICN–SEA traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
186 departures · 47,612 passengers
82.1%
Load
June 2025
181 departures · 48,836 passengers
86.3%
Load
July 2025
183 departures · 48,188 passengers
84.5%
Load
August 2025
185 departures · 50,493 passengers
88.2%
Load
September 2025
194 departures · 46,555 passengers
76.2%
Load
October 2025
220 departures · 51,802 passengers
77.5%
Load
November 2025
215 departures · 50,160 passengers
79.3%
Load
December 2025
217 departures · 52,492 passengers
79.9%
Load
January 2026
216 departures · 49,642 passengers
75.4%
Load
February 2026
195 departures · 46,606 passengers
77.4%
Load
March 2026
217 departures · 61,480 passengers
91.9%
Load
April 2026
222 departures · 56,825 passengers
83.3%
Load
By direction
The DOT files each direction separately — they rarely match.
ICN → SEA
90.4% full
115 departures · 31,828 passengers
SEA → ICN
75.8% full
107 departures · 24,997 passengers
Nonstop ICN–SEA traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Seoul
KR
Incheon International Airport
Coordinates
37.47°N, 126.45°E
Hemisphere
N · E
Frequently asked
How far is Seoul (ICN) from Seattle (SEA)?
ICN to SEA is 5,203 miles (8,373 km / 4,521 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from ICN to SEA?
A nonstop covers the 5,203-mile great-circle distance in roughly 11h 12m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies ICN–SEA?
In April 2026, the Airbus A350-900 flew the largest share of departures (46.9%), followed by the Boeing 787-10 (27.0%).
What mileage do I earn flying ICN–SEA?
Distance-based programs credit off the 5,203-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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