Seattle (BFI) to Seattle (SEA)
Flight time
≈ 0h 49m
Bearing
185° S
Seattle (BFI) to Seattle (SEA) is 5 miles (9 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BFI–SEA
US DOT T-100 · filed dataIn April 2026, Alaska Airlines operated the most departures, one of 2 carriers flying nonstop BFI–SEA; the Boeing 757-200 was the most common aircraft at 50% of departures; flights ran 0% full.
Departures
4
April 2026
Seats
627
both directions
Passengers
0
both directions
Load factor
0.0%
passengers ÷ seats
Who flies BFI–SEA?
Alaska Airlines operated the most nonstop BFI–SEA departures in April 2026 (2), one of 2 carriers on the route.
- AS
Alaska Airlines
2 departures · 356 seats
Share of departures50.0%0.0%
Load
- DL
Delta Air Lines
2 departures · 271 seats
Share of departures50.0%0.0%
Load
What plane flies BFI–SEA?
In April 2026, the Boeing 757-200 flew 50% of BFI–SEA departures — more than any other aircraft type.
- Boeing 757-200
2 departures · 0.0% load
50.0% - Boeing 737 MAX 9
2 departures · 0.0% load
50.0%
How has BFI–SEA traffic changed?
Nonstop BFI–SEA departures rose from 1 in May 2025 to 4 in April 2026.
Monthly nonstop BFI–SEA traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
1 departures · 0 passengers
0.0%
Load
June 2025
11 departures · 66 passengers
3.9%
Load
July 2025
1 departures · 0 passengers
0.0%
Load
August 2025
4 departures · 0 passengers
0.0%
Load
September 2025
2 departures · 0 passengers
0.0%
Load
October 2025
3 departures · 0 passengers
0.0%
Load
November 2025
3 departures · 0 passengers
0.0%
Load
December 2025
5 departures · 0 passengers
0.0%
Load
January 2026
6 departures · 0 passengers
0.0%
Load
February 2026
4 departures · 0 passengers
0.0%
Load
March 2026
5 departures · 0 passengers
0.0%
Load
April 2026
4 departures · 0 passengers
0.0%
Load
Nonstop BFI–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
Seattle
US
King County International Airport - Boeing Field
Coordinates
47.53°N, 122.30°W
Hemisphere
N · W
Frequently asked
How far is Seattle (BFI) from Seattle (SEA)?
BFI to SEA is 5 miles (9 km / 5 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BFI to SEA?
A nonstop covers the 5-mile great-circle distance in roughly 0h 49m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BFI–SEA?
In April 2026, the Boeing 757-200 flew the largest share of departures (50.0%), followed by the Boeing 737 MAX 9 (50.0%).
What mileage do I earn flying BFI–SEA?
Distance-based programs credit off the 5-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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