Detroit (DTW) to Seattle (SEA) flights
Delta Air Lines, Alaska Airlines fly nonstop from Detroit Metropolitan Wayne County Airport to Seattle-Tacoma International Airport, with about 48 flights a week in July 2026. The 1,927-mile flight takes about 4h 57m gate to gate.
- Distance
- 1,927 mi · 3,101 km
- Flight time
- 4h 57m
- Airlines
- 2
- Seats filled
- 90%
Airlines flying DTW to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 35 | Boeing 737-900ER, Airbus A321, Boeing 757-300 | 256,486 | 4h 57m |
| Alaska Airlines | 14 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 85,042 | 4h 56m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
DTW to SEA flight schedule
7 flight numbers flew this route in August 2026, 7 of them almost daily. The first usually leaves at 6:00am and the last at 8:05pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| DL 814Delta Air Lines | 6:00am | 7:49am | 31 | 90% |
| AS 344Alaska Airlines | 7:01am | 9:00am | 31 | 74% |
| DL 734Delta Air Lines | 8:30am | 10:31am | 31 | 74% |
| DL 728Delta Air Lines | 12:35pm | 2:34pm | 31 | 77% |
| DL 944Delta Air Lines | 4:49pm | 6:45pm | 31 | 67% |
| AS 313Alaska Airlines | 5:31pm | 7:33pm | 31 | 75% |
| DL 565Delta Air Lines | 8:05pm | 10:05pm | 31 | 62% |
Is DTW to SEA on time?
From September 2025 to August 2026, 73% of 2,067 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 6am were the most punctual (85%), those around 8pm the least (61%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (48%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 1,518 | 71% | 18 min | 0.8% |
| Alaska Airlines | 549 | 77% | 13 min | 0.4% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 136 | 85% | |
| 7am to 8am | 145 | 79% | |
| 8am to 9am | 335 | 75% | |
| 12pm to 1pm | 339 | 76% | |
| 4pm to 5pm | 428 | 67% | |
| 5pm to 6pm | 210 | 79% | |
| 6pm to 7pm | 63 | 79% | |
| 7pm to 8pm | 59 | 66% | |
| 8pm to 9pm | 280 | 61% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 212 | 36,481 | |
| September 2025 | 176 | 28,183 | |
| October 2025 | 158 | 25,728 | |
| November 2025 | 155 | 24,255 | |
| December 2025 | 162 | 26,723 | |
| January 2026 | 134 | 20,098 | |
| February 2026 | 124 | 19,828 | |
| March 2026 | 144 | 22,980 | |
| April 2026 | 155 | 23,829 | |
| May 2026 | 205 | 36,536 | |
| June 2026 | 209 | 37,817 | |
| July 2026 | 214 | 39,070 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.