Route · SEA → DAL · 2020–2025 BTS data
Seattle to Dallas
The SEA–DAL corridor (Seattle, WA → Dallas, TX) runs behind the national average, served by 4 carriers across roughly 1,670 miles.
Data updated 2026-06-13
- 75.3%
- On-time
- -3.7 pts
- vs US avg
- 50 min
- Delay when late
- 1,922
- Flights
Cancelled
1.0%
Best Month
Jul 2023 85%
Worst Month
Aug 2023 77%
Distance
1,670 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Sep 2025 | 30 | 10 | 0 | 0 | WN |
| Aug 2025 | 32 | 12 | 0 | 0 | WN |
| Jul 2025 | 35 | 22 | 0 | 2 | WN |
| Jun 2025 | 30 | 16 | 0 | 0 | WN |
| Dec 2024 | 31 | 6 | 0 | 0 | AS |
| Oct 2024 | 31 | 4 | 0 | 0 | AS |
| Sep 2024 | 39 | 7 | 0 | 0 | WN,AS |
| Aug 2024 | 41 | 11 | 0 | 0 | AS,WN |
| Jul 2024 | 43 | 5 | 0 | 0 | AS,WN |
| Jun 2024 | 40 | 4 | 0 | 0 | AS,WN |
| Apr 2024 | 30 | 4 | 0 | 0 | AS |
| Mar 2024 | 31 | 6 | 1 | 0 | AS |
| Dec 2023 | 31 | 4 | 0 | 0 | AS |
| Oct 2023 | 31 | 4 | 0 | 0 | AS |
| Sep 2023 | 36 | 3 | 0 | 0 | AS,WN |
| Aug 2023 | 64 | 15 | 0 | 0 | AS,WN |
| Jul 2023 | 67 | 10 | 0 | 0 | AS,WN |
| Jun 2023 | 49 | 13 | 0 | 1 | AS,WN |
| May 2023 | 31 | 8 | 0 | 0 | AS |
| Apr 2023 | 30 | 7 | 0 | 0 | AS |
| Dec 2022 | 36 | 14 | 6 | 0 | AS,WN |
| Nov 2022 | 32 | 4 | 2 | 1 | WN,AS |
| Oct 2022 | 31 | 3 | 0 | 0 | AS |
| Sep 2022 | 31 | 3 | 0 | 1 | WN,AS |
Cancellation Rate
1.0%
9 of 882 flights
Diversion Rate
0.6%
5 of 882 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 →DAL - Dallas
Full on-time, delay-cause, and seasonal performance for Dallas, TX.
Destination airport →Compare the two airports
See SEA and DAL 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–DAL.
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What the Data Says About SEA to DAL
The Seattle to Dallas corridor (SEA to DAL) posts a 75.3% on-time rate on the lower edge of the average band, based on 1,922 tracked flights. Late flights run 49.6 minutes behind on average. 4 carriers cover the 1,670-mile route; over the last 24 months, 9 of 882 flights were cancelled (1.0%) and 0.6% diverted.
Monthly performance varies moderately here: Jul 2023 was the strongest month at 85% on-time versus Aug 2023 at 77%, a 9-point difference.
Frequently Asked Questions
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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.