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
Filed traffic dataIn July 2026, Delta Air Lines operated the most departures, one of 4 carriers flying nonstop ICN–SEA; the Airbus A350-900 was the most common aircraft at 47% of departures; flights ran 86% full.
Departures
222
July 2026
Seats
68,322
both directions
Passengers
59,084
both directions
Load factor
86.5%
RPM ÷ ASM
Who flies ICN–SEA?
Delta Air Lines operated the most nonstop ICN–SEA departures in July 2026 (62), one of 4 carriers on the route.
- DL
62 departures · 18,288 seats
Share of departures27.9%84.3%
Load
- KE
Korean Air
62 departures · 20,150 seats
Share of departures27.9%88.3%
Load
- AS
54 departures · 16,200 seats
Share of departures24.3%83.3%
Load
- OZ
Asiana Airlines
44 departures · 13,684 seats
Share of departures19.8%90.3%
Load
What plane flies ICN–SEA?
In July 2026, the Airbus A350-900 flew 47% of ICN–SEA departures — more than any other aircraft type.
- Airbus A350-900
105 departures · 87.6% load
47.3% - Boeing 787-10
62 departures · 88.3% load
27.9% - Boeing 787-9
54 departures · 83.3% load
24.3% - Boeing 767-400ER
1 departures · 0.0% load
0.4%
How has ICN–SEA traffic changed?
Nonstop ICN–SEA departures rose from 185 in August 2025 to 222 in July 2026.
Monthly nonstop ICN–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
May 2026
228 departures · 59,177 passengers
84.4%
Load
June 2026
215 departures · 58,205 passengers
88.4%
Load
July 2026
222 departures · 59,084 passengers
86.5%
Load
By direction
Each direction is filed separately — they rarely match.
ICN → SEA
91.2% full
111 departures · 31,115 passengers
SEA → ICN
81.8% full
111 departures · 27,969 passengers
Nonstop ICN–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
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 July 2026, the Airbus A350-900 flew the largest share of departures (47.3%), followed by the Boeing 787-10 (27.9%).
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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