Route · STS → SEA · 2020–2025 BTS data
Santa Rosa to Seattle
The STS–SEA corridor (Santa Rosa, CA → Seattle, WA) runs ahead of the national average, served by 9 carriers across roughly 618 miles.
Data updated 2026-06-13
- 80.1%
- On-time
- +1.1 pts
- vs US avg
- 59 min
- Delay when late
- 2,915
- Flights
Cancelled
1.0%
Best Month
Sep 2023 87%
Worst Month
Jun 2025 53%
Distance
618 mi
Carriers
9
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 30 | 13 | 2 | 0 | AS,OO |
| Nov 2025 | 39 | 7 | 1 | 0 | OO,AS |
| Oct 2025 | 34 | 3 | 0 | 0 | AS |
| Sep 2025 | 60 | 16 | 0 | 0 | AS |
| Aug 2025 | 62 | 25 | 1 | 0 | OO,AS |
| Jul 2025 | 61 | 26 | 1 | 0 | AS,OO |
| Jun 2025 | 60 | 28 | 1 | 1 | AS,OO |
| May 2025 | 56 | 25 | 0 | 0 | AS,OO |
| Dec 2024 | 32 | 6 | 0 | 0 | AS,OO |
| Nov 2024 | 35 | 9 | 0 | 0 | OO,AS |
| Sep 2024 | 59 | 18 | 1 | 0 | AS |
| Aug 2024 | 61 | 21 | 0 | 0 | AS,OO |
| Jul 2024 | 60 | 11 | 0 | 0 | AS,OO |
| Jun 2024 | 47 | 16 | 0 | 0 | AS,OO |
| May 2024 | 32 | 5 | 0 | 0 | AS,OO |
| Apr 2024 | 30 | 5 | 0 | 0 | AS |
| Mar 2024 | 31 | 2 | 1 | 0 | AS,OO |
| Jan 2024 | 31 | 5 | 1 | 0 | AS,OO |
| Dec 2023 | 31 | 7 | 1 | 0 | AS |
| Nov 2023 | 50 | 8 | 0 | 0 | AS,OO |
| Oct 2023 | 49 | 14 | 0 | 0 | AS,OO |
| Sep 2023 | 60 | 8 | 0 | 0 | AS,OO |
| Aug 2023 | 62 | 17 | 0 | 0 | AS |
| Jul 2023 | 48 | 9 | 1 | 0 | AS |
Cancellation Rate
1.0%
11 of 1,120 flights
Diversion Rate
0.1%
1 of 1,120 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STS - Santa Rosa
Full on-time, delay-cause, and seasonal performance for Santa Rosa, CA.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See STS 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 STS–SEA.
Routes with a similar on-time rate
What the Data Says About STS to SEA
2,915 tracked flights put the STS to SEA pairing (Santa Rosa to Seattle) at a 80.1% on-time rate, squarely in line with the wider network. Delays that do occur run 58.6 minutes on average. Across the 618-mile route and its 9 carriers, the trailing 24 months show 1.0% cancelled and 0.1% diverted (1,120 flights sampled).
The monthly split is wide on this route: Sep 2023 posted the strongest performance at 87% on-time, while Jun 2025 came in at just 53% - 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.