Route · SEA → SIT · 2020–2025 BTS data
Seattle to Sitka
The SEA–SIT corridor (Seattle, WA → Sitka, AK) runs behind the national average, served by 3 carriers across roughly 861 miles.
Data updated 2026-06-13
- 74.4%
- On-time
- -4.6 pts
- vs US avg
- 58 min
- Delay when late
- 1,647
- Flights
Cancelled
0.8%
Best Month
Aug 2020 92%
Worst Month
Jul 2025 53%
Distance
861 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Sep 2025 | 30 | 6 | 0 | 0 | AS |
| Aug 2025 | 49 | 20 | 0 | 0 | AS |
| Jul 2025 | 62 | 29 | 1 | 1 | AS |
| Jun 2025 | 60 | 28 | 0 | 0 | AS |
| May 2025 | 35 | 10 | 0 | 0 | AS |
| Sep 2024 | 37 | 12 | 0 | 0 | OO,AS |
| Aug 2024 | 80 | 33 | 2 | 3 | AS,OO |
| Jul 2024 | 93 | 27 | 1 | 0 | AS,OO |
| Jun 2024 | 84 | 38 | 1 | 2 | AS,OO |
| May 2024 | 32 | 16 | 0 | 0 | AS |
| Sep 2023 | 39 | 7 | 0 | 0 | AS,OO |
| Aug 2023 | 93 | 25 | 0 | 1 | AS,OO |
| Jul 2023 | 93 | 24 | 0 | 2 | AS,OO |
| Jun 2023 | 73 | 19 | 0 | 0 | AS,OO |
| Sep 2022 | 39 | 4 | 0 | 0 | OO,AS |
| Aug 2022 | 93 | 20 | 1 | 2 | AS,OO |
| Jul 2022 | 93 | 26 | 4 | 2 | OO,AS |
| Jun 2022 | 85 | 18 | 3 | 0 | OO,AS |
| Sep 2021 | 41 | 8 | 0 | 0 | OO,AS |
| Aug 2021 | 78 | 17 | 0 | 0 | OO,AS |
| Jul 2021 | 92 | 9 | 0 | 0 | OO,AS |
| Jun 2021 | 60 | 12 | 0 | 1 | OO,AS |
| Sep 2020 | 30 | 2 | 0 | 0 | AS |
| Aug 2020 | 61 | 5 | 0 | 1 | AS,OO |
Cancellation Rate
0.8%
13 of 1,532 flights
Diversion Rate
1.0%
15 of 1,532 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 →SIT - Sitka
Full on-time, delay-cause, and seasonal performance for Sitka, AK.
Destination airport →Compare the two airports
See SEA and SIT 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–SIT.
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What the Data Says About SEA to SIT
On-time performance on the SEA to SIT pairing (Seattle to Sitka) trails a chunk of the network: 74.4% of 1,647 tracked flights arrived on schedule, with a 57.8-minute average delay on the ones that ran late. The route spans about 861 miles across 3 carriers. Cancellations over the trailing 24 months hit 0.8% (13 of 1,532 flights), with 1.0% diverted.
The monthly split is wide on this route: Aug 2020 posted the strongest performance at 92% on-time, while Jul 2025 came in at just 53% - a 39-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.