Route · ATL → SEA · 2020–2025 BTS data
Atlanta to Seattle
The ATL–SEA corridor (Atlanta, GA → Seattle, WA) runs ahead of the national average, served by 2 carriers across roughly 2,182 miles.
Data updated 2026-06-13
- 82.5%
- On-time
- +3.5 pts
- vs US avg
- 59 min
- Delay when late
- 19,037
- Flights
Cancelled
1.0%
Best Month
Oct 2024 95%
Worst Month
Dec 2025 62%
Distance
2,182 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 269 | 103 | 3 | 1 | DL,AS |
| Nov 2025 | 257 | 39 | 2 | 0 | DL,AS |
| Oct 2025 | 295 | 53 | 3 | 1 | AS,DL |
| Sep 2025 | 283 | 31 | 0 | 0 | DL,AS |
| Aug 2025 | 315 | 74 | 1 | 0 | AS,DL |
| Jul 2025 | 347 | 75 | 3 | 3 | AS,DL |
| Jun 2025 | 328 | 94 | 4 | 1 | AS,DL |
| May 2025 | 291 | 63 | 0 | 0 | AS,DL |
| Apr 2025 | 244 | 52 | 3 | 0 | DL,AS |
| Mar 2025 | 223 | 43 | 0 | 1 | AS,DL |
| Feb 2025 | 184 | 52 | 0 | 0 | AS,DL |
| Jan 2025 | 215 | 45 | 7 | 1 | AS,DL |
| Dec 2024 | 270 | 31 | 0 | 1 | AS,DL |
| Nov 2024 | 263 | 20 | 0 | 0 | AS,DL |
| Oct 2024 | 299 | 15 | 0 | 0 | AS,DL |
| Sep 2024 | 330 | 47 | 2 | 0 | AS,DL |
| Aug 2024 | 374 | 71 | 0 | 1 | AS,DL |
| Jul 2024 | 377 | 116 | 22 | 0 | AS,DL |
| Jun 2024 | 348 | 93 | 0 | 0 | AS,DL |
| May 2024 | 312 | 92 | 0 | 0 | AS,DL |
| Apr 2024 | 269 | 39 | 0 | 0 | AS,DL |
| Mar 2024 | 251 | 19 | 1 | 1 | AS,DL |
| Feb 2024 | 211 | 20 | 1 | 0 | AS,DL |
| Jan 2024 | 233 | 32 | 15 | 0 | AS,DL |
Cancellation Rate
1.0%
67 of 6,788 flights
Diversion Rate
0.2%
11 of 6,788 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ATL - Atlanta
Full on-time, delay-cause, and seasonal performance for Atlanta, GA.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See ATL 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 ATL–SEA.
Routes with a similar on-time rate
What the Data Says About ATL to SEA
Bureau of Transportation Statistics records show Atlanta to Seattle (ATL to SEA) running a 82.5% on-time rate over 19,037 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 59.2 minutes. The 2,182-mile corridor is served by 2 carriers, and over the last 24 months 1.0% of 6,788 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 95% on-time, while Dec 2025 came in at just 62% - a 33-point swing worth factoring into travel timing.
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.