Route · SEA → PIT · 2020–2025 BTS data
Seattle to Pittsburgh
The SEA–PIT corridor (Seattle, WA → Pittsburgh, PA) runs behind the national average, served by 1 carrier across roughly 2,125 miles.
Data updated 2026-06-13
- 78.4%
- On-time
- -0.6 pts
- vs US avg
- 48 min
- Delay when late
- 1,785
- Flights
Cancelled
0.4%
Best Month
Sep 2025 85%
Worst Month
Aug 2025 66%
Distance
2,125 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Oct 2025 | 33 | 2 | 1 | 0 | AS |
| Sep 2025 | 52 | 8 | 0 | 0 | AS |
| Aug 2025 | 58 | 20 | 0 | 0 | AS |
| Jul 2025 | 62 | 20 | 1 | 1 | AS |
| Jun 2025 | 60 | 19 | 0 | 1 | AS |
| May 2025 | 49 | 13 | 0 | 0 | AS |
| Apr 2025 | 30 | 3 | 0 | 0 | AS |
| Oct 2024 | 31 | 5 | 0 | 0 | AS |
| Sep 2024 | 43 | 6 | 0 | 0 | AS |
| Aug 2024 | 54 | 18 | 2 | 0 | AS |
| Jul 2024 | 62 | 12 | 0 | 1 | AS |
| Jun 2024 | 60 | 17 | 0 | 0 | AS |
| May 2024 | 47 | 17 | 0 | 0 | AS |
| Apr 2024 | 30 | 7 | 0 | 0 | AS |
| Mar 2024 | 31 | 4 | 0 | 1 | AS |
| Nov 2023 | 30 | 4 | 0 | 0 | AS |
| Oct 2023 | 31 | 6 | 0 | 0 | AS |
| Sep 2023 | 35 | 4 | 0 | 0 | AS |
| Aug 2023 | 62 | 12 | 0 | 0 | AS |
| Jul 2023 | 62 | 16 | 0 | 0 | AS |
| Jun 2023 | 46 | 21 | 0 | 0 | AS |
| May 2023 | 31 | 3 | 0 | 0 | AS |
| Apr 2023 | 30 | 8 | 0 | 0 | AS |
| Mar 2023 | 31 | 4 | 0 | 1 | AS |
Cancellation Rate
0.4%
4 of 1,060 flights
Diversion Rate
0.5%
5 of 1,060 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 →PIT - Pittsburgh
Full on-time, delay-cause, and seasonal performance for Pittsburgh, PA.
Destination airport →Compare the two airports
See SEA and PIT 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–PIT.
Routes with a similar on-time rate
What the Data Says About SEA to PIT
The Seattle to Pittsburgh corridor (SEA to PIT) posts a 78.4% on-time rate on the lower edge of the average band, based on 1,785 tracked flights. Late flights run 48.2 minutes behind on average. 1 carrier cover the 2,125-mile route; over the last 24 months, 4 of 1,060 flights were cancelled (0.4%) and 0.5% diverted.
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 85% on-time, while Aug 2025 came in at just 66% - a 19-point swing worth factoring into travel timing.
Frequently Asked Questions
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Flight Guides
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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.