Route · SEA → ANC · 2020–2025 BTS data
Seattle to Anchorage
The SEA–ANC corridor (Seattle, WA → Anchorage, AK) runs behind the national average, served by 10 carriers across roughly 1,448 miles.
Data updated 2026-06-13
- 77.5%
- On-time
- -1.5 pts
- vs US avg
- 50 min
- Delay when late
- 41,143
- Flights
Cancelled
1.0%
Best Month
Sep 2025 88%
Worst Month
Dec 2025 55%
Distance
1,448 mi
Carriers
10
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 478 | 214 | 5 | 2 | DL,AS |
| Nov 2025 | 483 | 72 | 6 | 0 | DL,AS |
| Oct 2025 | 553 | 127 | 9 | 0 | AS,DL |
| Sep 2025 | 624 | 72 | 1 | 0 | DL,AS,HA |
| Aug 2025 | 724 | 198 | 8 | 0 | HA,AS,DL |
| Jul 2025 | 745 | 250 | 16 | 0 | AS,DL,HA |
| Jun 2025 | 701 | 232 | 4 | 1 | AS,DL,HA |
| May 2025 | 666 | 173 | 5 | 0 | AS,DL |
| Apr 2025 | 491 | 128 | 1 | 1 | DL,AS |
| Mar 2025 | 476 | 72 | 2 | 0 | AS,DL |
| Feb 2025 | 439 | 89 | 5 | 0 | AS,DL |
| Jan 2025 | 499 | 146 | 4 | 1 | AS,DL |
| Dec 2024 | 513 | 101 | 0 | 2 | AS,DL |
| Nov 2024 | 516 | 94 | 1 | 0 | AS,DL |
| Oct 2024 | 588 | 101 | 4 | 1 | AS,DL |
| Sep 2024 | 662 | 166 | 3 | 0 | AS,DL |
| Aug 2024 | 844 | 256 | 7 | 1 | AS,DL |
| Jul 2024 | 869 | 274 | 9 | 0 | AS,DL |
| Jun 2024 | 796 | 231 | 6 | 2 | AS,DL |
| May 2024 | 701 | 264 | 4 | 0 | AS,DL |
| Apr 2024 | 570 | 139 | 1 | 0 | AS,DL |
| Mar 2024 | 534 | 119 | 1 | 1 | AS,DL |
| Feb 2024 | 480 | 87 | 0 | 0 | AS,DL |
| Jan 2024 | 517 | 168 | 38 | 1 | AS,DL |
Cancellation Rate
1.0%
140 of 14,469 flights
Diversion Rate
0.1%
13 of 14,469 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 →ANC - Anchorage
Full on-time, delay-cause, and seasonal performance for Anchorage, AK.
Destination airport →Compare the two airports
See SEA and ANC 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–ANC.
Routes with a similar on-time rate
What the Data Says About SEA to ANC
The Seattle to Anchorage corridor (SEA to ANC) posts a 77.5% on-time rate on the lower edge of the average band, based on 41,143 tracked flights. Late flights run 50.0 minutes behind on average. 10 carriers cover the 1,448-mile route; over the last 24 months, 140 of 14,469 flights were cancelled (1.0%) and 0.1% diverted.
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 88% on-time, while Dec 2025 came in at just 55% - 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.