Seattle (SEA) to Detroit (DTW) flights
Delta Air Lines, Alaska Airlines fly nonstop from Seattle-Tacoma International Airport to Detroit Metropolitan Wayne County Airport, with about 49 flights a week in July 2026. The 1,927-mile flight takes about 4h 10m gate to gate.
- Distance
- 1,927 mi · 3,101 km
- Flight time
- 4h 10m
- Airlines
- 2
- Seats filled
- 89%
Airlines flying SEA to DTW
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 35 | Boeing 737-900ER, Airbus A321, Boeing 757-300 | 258,052 | 4h 9m |
| Alaska Airlines | 14 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 82,498 | 4h 11m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to DTW flight schedule
7 flight numbers flew this route in August 2026, 7 of them almost daily. The first usually leaves at 5:30am and the last at 11:10pm. 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 812Delta Air Lines | 5:30am | 12:42pm | 31 | 92% |
| AS 313Alaska Airlines | 9:18am | 4:33pm | 31 | 85% |
| DL 2324Delta Air Lines | 9:53am | 5:10pm | 31 | 90% |
| DL 1706Delta Air Lines | 11:18am | 6:35pm | 31 | 81% |
| DL 533Delta Air Lines | 3:00pm | 10:16pm | 31 | 85% |
| AS 343Alaska Airlines | 10:22pm | 5:41am | 31 | 87% |
| DL 810Delta Air Lines | 11:10pm | 6:23am | 31 | 90% |
Is SEA to DTW on time?
From September 2025 to August 2026, 87% of 2,063 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 6am were the most punctual (94%), those around 1pm the least (79%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (53%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 1,515 | 87% | 10 min | 0.9% |
| Alaska Airlines | 548 | 85% | 9 min | 0.2% |
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 |
|---|---|---|---|
| 5am to 6am | 118 | 89% | |
| 6am to 7am | 247 | 94% | |
| 8am to 9am | 190 | 87% | |
| 9am to 10am | 382 | 86% | |
| 11am to 12pm | 211 | 80% | |
| 1pm to 2pm | 110 | 79% | |
| 2pm to 3pm | 57 | 83% | |
| 3pm to 4pm | 169 | 88% | |
| 9pm to 10pm | 42 | 91% | |
| 10pm to 11pm | 160 | 85% | |
| 11pm to 12am | 345 | 90% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 213 | 37,152 | |
| September 2025 | 177 | 29,439 | |
| October 2025 | 159 | 26,132 | |
| November 2025 | 157 | 24,190 | |
| December 2025 | 164 | 25,681 | |
| January 2026 | 133 | 20,681 | |
| February 2026 | 125 | 19,086 | |
| March 2026 | 146 | 23,123 | |
| April 2026 | 156 | 24,895 | |
| May 2026 | 201 | 32,740 | |
| June 2026 | 210 | 38,177 | |
| July 2026 | 216 | 39,327 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.