Detroit (DTW) to Seattle (SEA)
Flight time
≈ 4h 39m
Bearing
294° NW
Detroit (DTW) to Seattle (SEA) is 1,922 miles (3,093 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies DTW–SEA
Filed traffic dataIn July 2026, Delta Air Lines operated the most departures, one of 2 carriers flying nonstop DTW–SEA; the Boeing 737-900ER was the most common aircraft at 56% of departures; flights ran 94% full.
Departures
430
July 2026
Seats
83,144
both directions
Passengers
78,397
both directions
Load factor
94.3%
RPM ÷ ASM
Who flies DTW–SEA?
Delta Air Lines operated the most nonstop DTW–SEA departures in July 2026 (308), one of 2 carriers on the route.
- DL
308 departures · 61,772 seats
Share of departures71.6%94.5%
Load
- AS
122 departures · 21,372 seats
Share of departures28.4%93.6%
Load
What plane flies DTW–SEA?
In July 2026, the Boeing 737-900ER flew 56% of DTW–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
242 departures · 95.2% load
56.3% - Boeing 757-300
117 departures · 93.3% load
27.2% - Boeing 737 MAX 9
46 departures · 93.1% load
10.7% - Boeing 737-800
19 departures · 94.9% load
4.4% - Airbus A321neo
4 departures · 87.6% load
0.9% - Boeing 737 MAX 8
2 departures · 96.9% load
0.5%
How has DTW–SEA traffic changed?
Nonstop DTW–SEA departures rose from 425 in August 2025 to 430 in July 2026.
Monthly nonstop DTW–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
425 departures · 73,633 passengers
95.1%
Load
September 2025
353 departures · 57,622 passengers
89.3%
Load
October 2025
320 departures · 52,134 passengers
89.1%
Load
November 2025
312 departures · 48,445 passengers
83.9%
Load
December 2025
326 departures · 52,404 passengers
87.7%
Load
January 2026
269 departures · 41,060 passengers
83.4%
Load
February 2026
249 departures · 38,914 passengers
85.7%
Load
March 2026
290 departures · 46,103 passengers
88.9%
Load
April 2026
311 departures · 48,724 passengers
85.6%
Load
May 2026
406 departures · 69,276 passengers
87.5%
Load
June 2026
419 departures · 75,994 passengers
93.2%
Load
July 2026
430 departures · 78,397 passengers
94.3%
Load
By direction
Each direction is filed separately — they rarely match.
SEA → DTW
94.2% full
216 departures · 39,327 passengers
DTW → SEA
94.3% full
214 departures · 39,070 passengers
Nonstop DTW–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
Frequently asked
How far is Detroit (DTW) from Seattle (SEA)?
DTW to SEA is 1,922 miles (3,093 km / 1,670 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from DTW to SEA?
A nonstop covers the 1,922-mile great-circle distance in roughly 4h 39m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies DTW–SEA?
In July 2026, the Boeing 737-900ER flew the largest share of departures (56.3%), followed by the Boeing 757-300 (27.2%).
What mileage do I earn flying DTW–SEA?
Distance-based programs credit off the 1,922-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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