Route · SEA → DTW · 2020–2025 BTS data
Seattle to Detroit
The SEA–DTW corridor (Seattle, WA → Detroit, MI) runs ahead of the national average, served by 3 carriers across roughly 1,927 miles.
Data updated 2026-06-13
- 86.7%
- On-time
- +7.7 pts
- vs US avg
- 63 min
- Delay when late
- 11,564
- Flights
Cancelled
0.7%
Best Month
Oct 2024 94%
Worst Month
Jul 2024 71%
Distance
1,927 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 164 | 33 | 2 | 0 | DL,AS |
| Nov 2025 | 155 | 17 | 0 | 3 | DL,AS |
| Oct 2025 | 157 | 12 | 0 | 0 | AS,DL |
| Sep 2025 | 176 | 28 | 0 | 0 | DL,AS |
| Aug 2025 | 214 | 53 | 2 | 0 | AS,DL |
| Jul 2025 | 228 | 53 | 4 | 3 | AS,DL |
| Jun 2025 | 218 | 40 | 1 | 0 | AS,DL |
| May 2025 | 197 | 33 | 0 | 0 | AS,DL |
| Apr 2025 | 147 | 16 | 0 | 0 | DL,AS |
| Mar 2025 | 141 | 11 | 0 | 0 | AS,DL |
| Feb 2025 | 108 | 9 | 1 | 0 | AS,DL |
| Jan 2025 | 122 | 12 | 0 | 0 | AS,DL |
| Dec 2024 | 153 | 16 | 0 | 0 | AS,DL |
| Nov 2024 | 147 | 12 | 0 | 0 | AS,DL |
| Oct 2024 | 161 | 10 | 0 | 0 | AS,DL |
| Sep 2024 | 207 | 34 | 0 | 0 | AS,DL |
| Aug 2024 | 223 | 49 | 1 | 1 | AS,DL |
| Jul 2024 | 234 | 69 | 9 | 0 | AS,DL |
| Jun 2024 | 222 | 47 | 0 | 0 | AS,DL |
| May 2024 | 193 | 49 | 0 | 2 | AS,DL |
| Apr 2024 | 147 | 13 | 1 | 0 | AS,DL |
| Mar 2024 | 142 | 14 | 0 | 0 | AS,DL |
| Feb 2024 | 120 | 8 | 0 | 0 | AS,DL |
| Jan 2024 | 131 | 23 | 7 | 1 | AS,DL |
Cancellation Rate
0.7%
28 of 4,107 flights
Diversion Rate
0.2%
10 of 4,107 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Origin airport →DTW - Detroit
Full on-time, delay-cause, and seasonal performance for Detroit, MI.
Destination airport →Compare the two airports
See SEA and DTW side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SEA–DTW.
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What the Data Says About SEA to DTW
Seattle to Detroit (SEA to DTW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.7% on-time rate across 11,564 flights, with delays that do happen averaging 62.5 minutes. The corridor runs roughly 1,927 miles and is served by 3 carriers. Over the most recent 24 months, 28 of 4,107 flights were cancelled (0.7%) and 10 diverted (0.2%).
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 94% on-time, while Jul 2024 came in at just 71% - a 23-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to DTW? ▼
What is the cancellation rate for SEA to DTW? ▼
How far is the flight from SEA to DTW? ▼
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Flight Guides
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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.