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.
Look up a route, or build a trip
Change the airports, or add stops for a multi-leg trip.
What actually flies BWI–SEA
Filed traffic dataIn May 2026, Alaska Airlines was the only carrier flying nonstop BWI–SEA; the Boeing 737-900ER was the most common aircraft at 48% of departures; flights ran 87% full.
Departures
116
May 2026
Seats
20,512
both directions
Passengers
17,866
both directions
Load factor
87.1%
RPM ÷ ASM
Who flies BWI–SEA?
Alaska Airlines was the only carrier to fly nonstop BWI–SEA in May 2026 (116 departures).
- AS
116 departures · 20,512 seats
Share of departures100.0%87.1%
Load
What plane flies BWI–SEA?
In May 2026, the Boeing 737-900ER flew 48% of BWI–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
56 departures · 86.7% load
48.3% - Boeing 737 MAX 9
52 departures · 87.2% load
44.8% - Boeing 737-800
4 departures · 91.3% load
3.5% - Boeing 737 MAX 8
4 departures · 87.3% load
3.5%
How has BWI–SEA traffic changed?
Nonstop BWI–SEA departures fell from 173 in June 2025 to 116 in May 2026.
Monthly nonstop BWI–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
173 departures · 26,606 passengers
90.2%
Load
July 2025
182 departures · 28,482 passengers
93.0%
Load
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
By direction
Each direction is filed separately — they rarely match.
BWI → SEA
88.7% full
58 departures · 9,096 passengers
SEA → BWI
85.5% full
58 departures · 8,770 passengers
Nonstop BWI–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 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 May 2026, the Boeing 737-900ER flew the largest share of departures (48.3%), followed by the Boeing 737 MAX 9 (44.8%).
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.
Keep exploring
Every route below is its own page.
Popular long-haul routes