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 May 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 45% of departures; flights ran 87% full.
Departures
406
May 2026
Seats
79,212
both directions
Passengers
69,276
both directions
Load factor
87.5%
RPM ÷ ASM
Who flies DTW–SEA?
Delta Air Lines operated the most nonstop DTW–SEA departures in May 2026 (282), one of 2 carriers on the route.
- DL
282 departures · 57,471 seats
Share of departures69.5%87.6%
Load
- AS
124 departures · 21,741 seats
Share of departures30.5%86.9%
Load
What plane flies DTW–SEA?
In May 2026, the Boeing 737-900ER flew 45% of DTW–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
184 departures · 88.8% load
45.3% - Boeing 757-300
107 departures · 83.6% load
26.4% - Airbus A321neo
52 departures · 93.6% load
12.8% - Boeing 737 MAX 9
36 departures · 87.7% load
8.9% - Boeing 737-800
15 departures · 87.0% load
3.7% - Boeing 757-200
6 departures · 82.9% load
1.5% - Boeing 737 MAX 8
5 departures · 88.8% load
1.2% - Airbus A350-900
1 departures · 65.5% load
0.3%
How has DTW–SEA traffic changed?
Nonstop DTW–SEA departures fell from 437 in June 2025 to 406 in May 2026.
Monthly nonstop DTW–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
437 departures · 73,300 passengers
91.6%
Load
July 2025
446 departures · 75,367 passengers
92.7%
Load
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
By direction
Each direction is filed separately — they rarely match.
DTW → SEA
91.4% full
205 departures · 36,536 passengers
SEA → DTW
83.4% full
201 departures · 32,740 passengers
Nonstop DTW–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
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 May 2026, the Boeing 737-900ER flew the largest share of departures (45.3%), followed by the Boeing 757-300 (26.4%).
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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