Route · DTW → SEA · 2020–2025 BTS data
Detroit to Seattle
The DTW–SEA corridor (Detroit, MI → Seattle, WA) runs ahead of the national average, served by 3 carriers across roughly 1,927 miles.
Data updated 2026-06-13
- 85%
- On-time
- +6 pts
- vs US avg
- 61 min
- Delay when late
- 11,558
- Flights
Cancelled
0.7%
Best Month
Feb 2024 95%
Worst Month
Dec 2025 38%
Distance
1,927 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 164 | 101 | 2 | 0 | DL,AS |
| Nov 2025 | 154 | 43 | 0 | 0 | DL,AS |
| Oct 2025 | 159 | 20 | 0 | 1 | AS,DL |
| Sep 2025 | 176 | 18 | 0 | 0 | DL,AS |
| Aug 2025 | 214 | 35 | 2 | 0 | AS,DL |
| Jul 2025 | 228 | 53 | 5 | 0 | AS,DL |
| Jun 2025 | 218 | 46 | 1 | 0 | AS,DL |
| May 2025 | 197 | 17 | 0 | 0 | AS,DL |
| Apr 2025 | 147 | 21 | 0 | 0 | DL,AS |
| Mar 2025 | 141 | 18 | 0 | 0 | AS,DL |
| Feb 2025 | 108 | 23 | 1 | 0 | AS,DL |
| Jan 2025 | 122 | 19 | 0 | 0 | AS,DL |
| Dec 2024 | 153 | 21 | 0 | 0 | AS,DL |
| Nov 2024 | 147 | 12 | 0 | 0 | AS,DL |
| Oct 2024 | 161 | 19 | 0 | 0 | AS,DL |
| Sep 2024 | 208 | 20 | 1 | 1 | AS,DL |
| Aug 2024 | 223 | 49 | 1 | 1 | AS,DL |
| Jul 2024 | 234 | 39 | 9 | 1 | AS,DL |
| Jun 2024 | 222 | 81 | 0 | 0 | AS,DL |
| May 2024 | 194 | 52 | 0 | 0 | AS,DL |
| Apr 2024 | 146 | 18 | 1 | 0 | AS,DL |
| Mar 2024 | 142 | 21 | 0 | 1 | AS,DL |
| Feb 2024 | 120 | 6 | 0 | 0 | AS,DL |
| Jan 2024 | 131 | 28 | 7 | 0 | AS,DL |
Cancellation Rate
0.7%
30 of 4,109 flights
Diversion Rate
0.1%
5 of 4,109 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DTW - Detroit
Full on-time, delay-cause, and seasonal performance for Detroit, MI.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See DTW and SEA side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to DTW–SEA.
Routes with a similar on-time rate
What the Data Says About DTW to SEA
Detroit to Seattle (DTW to SEA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85% on-time rate across 11,558 flights, with delays that do happen averaging 60.8 minutes. The corridor runs roughly 1,927 miles and is served by 3 carriers. Over the most recent 24 months, 30 of 4,109 flights were cancelled (0.7%) and 5 diverted (0.1%).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 95% on-time, while Dec 2025 came in at just 38% - a 57-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from DTW to SEA? ▼
What is the cancellation rate for DTW to SEA? ▼
How far is the flight from DTW to SEA? ▼
When is the best time to fly from DTW to SEA? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
Explore PlainFlights
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.