Baltimore (BWI) to Seattle (SEA)
Flight time
≈ 5h 27m
Bearing
299° NW
Baltimore (BWI) to Seattle (SEA) is 2,329 miles (3,748 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BWI–SEA
Filed traffic dataIn July 2026, Alaska Airlines operated the most departures, one of 3 carriers flying nonstop BWI–SEA; the Boeing 737-900ER was the most common aircraft at 34% of departures; flights ran 93% full.
Departures
185
July 2026
Seats
32,241
both directions
Passengers
30,064
both directions
Load factor
93.3%
RPM ÷ ASM
Who flies BWI–SEA?
Alaska Airlines operated the most nonstop BWI–SEA departures in July 2026 (123), one of 3 carriers on the route.
- AS
123 departures · 21,826 seats
Share of departures66.5%93.0%
Load
- WN
61 departures · 10,143 seats
Share of departures33.0%96.2%
Load
- X9
1 departures · 272 seats
Share of departures0.5%0.0%
Load
What plane flies BWI–SEA?
In July 2026, the Boeing 737-900ER flew 34% of BWI–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
63 departures · 93.3% load
34.1% - Boeing 737 MAX 9
56 departures · 92.9% load
30.3% - Boeing 737 MAX 8
27 departures · 96.6% load
14.6% - Boeing 737-800
24 departures · 94.9% load
13.0% - Boeing 737-700
14 departures · 96.4% load
7.6% - Boeing 767-300
1 departures · 0.0% load
0.5%
How has BWI–SEA traffic changed?
Nonstop BWI–SEA departures fell from 186 in August 2025 to 185 in July 2026.
Monthly nonstop BWI–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
186 departures · 29,346 passengers
93.1%
Load
September 2025
181 departures · 27,468 passengers
88.6%
Load
October 2025
111 departures · 16,296 passengers
83.1%
Load
November 2025
105 departures · 14,196 passengers
76.0%
Load
December 2025
121 departures · 17,609 passengers
82.4%
Load
January 2026
69 departures · 9,215 passengers
75.7%
Load
February 2026
55 departures · 7,457 passengers
77.6%
Load
March 2026
62 departures · 9,825 passengers
89.9%
Load
April 2026
75 departures · 11,410 passengers
85.5%
Load
May 2026
116 departures · 17,866 passengers
87.1%
Load
June 2026
175 departures · 27,895 passengers
91.1%
Load
July 2026
185 departures · 30,064 passengers
93.3%
Load
By direction
Each direction is filed separately — they rarely match.
SEA → BWI
92.5% full
94 departures · 15,340 passengers
BWI → SEA
94.1% full
91 departures · 14,724 passengers
Nonstop BWI–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
Baltimore
US
Baltimore/Washington International Thurgood Marshall Airport
Coordinates
39.18°N, 76.67°W
Hemisphere
N · W
Frequently asked
How far is Baltimore (BWI) from Seattle (SEA)?
BWI to SEA is 2,329 miles (3,748 km / 2,024 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BWI to SEA?
A nonstop covers the 2,329-mile great-circle distance in roughly 5h 27m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BWI–SEA?
In July 2026, the Boeing 737-900ER flew the largest share of departures (34.1%), followed by the Boeing 737 MAX 9 (30.3%).
What mileage do I earn flying BWI–SEA?
Distance-based programs credit off the 2,329-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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