Route · CLE → SEA · 2020–2025 BTS data
Cleveland to Seattle
The CLE–SEA corridor (Cleveland, OH → Seattle, WA) runs behind the national average, served by 1 carrier across roughly 2,021 miles.
Data updated 2026-06-13
- 78.9%
- On-time
- -0.1 pts
- vs US avg
- 53 min
- Delay when late
- 1,300
- Flights
Cancelled
0.9%
Best Month
Aug 2023 90%
Worst Month
Jun 2024 60%
Distance
2,021 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Oct 2025 | 33 | 8 | 2 | 0 | AS |
| Sep 2025 | 48 | 7 | 0 | 0 | AS |
| Aug 2025 | 57 | 21 | 1 | 0 | AS |
| Jul 2025 | 61 | 17 | 2 | 1 | AS |
| Jun 2025 | 60 | 14 | 1 | 0 | AS |
| May 2025 | 48 | 11 | 0 | 0 | AS |
| Apr 2025 | 30 | 12 | 0 | 0 | AS |
| Oct 2024 | 32 | 4 | 0 | 0 | AS |
| Sep 2024 | 48 | 7 | 0 | 0 | AS |
| Aug 2024 | 56 | 15 | 1 | 0 | AS |
| Jul 2024 | 62 | 11 | 0 | 0 | AS |
| Jun 2024 | 60 | 24 | 0 | 0 | AS |
| May 2024 | 46 | 17 | 0 | 0 | AS |
| Apr 2024 | 30 | 3 | 1 | 0 | AS |
| Mar 2024 | 31 | 3 | 1 | 0 | AS |
| Nov 2023 | 30 | 9 | 1 | 0 | AS |
| Oct 2023 | 32 | 3 | 0 | 0 | AS |
| Sep 2023 | 60 | 7 | 0 | 0 | AS |
| Aug 2023 | 62 | 6 | 0 | 0 | AS |
| Jul 2023 | 62 | 13 | 0 | 0 | AS |
| Jun 2023 | 45 | 4 | 0 | 0 | AS |
| May 2023 | 31 | 3 | 0 | 0 | AS |
| Apr 2023 | 30 | 5 | 0 | 0 | AS |
| Mar 2023 | 31 | 5 | 0 | 0 | AS |
Cancellation Rate
0.9%
10 of 1,085 flights
Diversion Rate
0.1%
1 of 1,085 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
CLE - Cleveland
Full on-time, delay-cause, and seasonal performance for Cleveland, OH.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See CLE 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 CLE–SEA.
Routes with a similar on-time rate
What the Data Says About CLE to SEA
1,300 tracked flights put the CLE to SEA pairing (Cleveland to Seattle) at a 78.9% on-time rate, squarely in line with the wider network. Delays that do occur run 52.8 minutes on average. Across the 2,021-mile route and its 1 carrier, the trailing 24 months show 0.9% cancelled and 0.1% diverted (1,085 flights sampled).
The monthly split is wide on this route: Aug 2023 posted the strongest performance at 90% on-time, while Jun 2024 came in at just 60% - a 30-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from CLE to SEA? ▼
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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.