Route · CMH → SEA · 2020–2025 BTS data
Columbus to Seattle
The CMH–SEA corridor (Columbus, OH → Seattle, WA) runs ahead of the national average, served by 2 carriers across roughly 2,016 miles.
Data updated 2026-06-13
- 79.8%
- On-time
- +0.8 pts
- vs US avg
- 54 min
- Delay when late
- 1,617
- Flights
Cancelled
0.4%
Best Month
Sep 2023 90%
Worst Month
Jul 2025 66%
Distance
2,016 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 19 | 0 | 0 | AS |
| Oct 2025 | 33 | 8 | 0 | 0 | AS |
| Sep 2025 | 52 | 6 | 0 | 0 | UA,DL,WN,AA,AS |
| Aug 2025 | 57 | 15 | 0 | 0 | AS |
| Jul 2025 | 61 | 21 | 1 | 0 | AS |
| Jun 2025 | 60 | 20 | 0 | 0 | AS |
| May 2025 | 48 | 12 | 0 | 0 | AS |
| Apr 2025 | 30 | 8 | 1 | 0 | AS |
| Nov 2024 | 30 | 1 | 1 | 0 | AS |
| Oct 2024 | 31 | 2 | 0 | 1 | AS |
| Sep 2024 | 48 | 10 | 0 | 0 | AS |
| Aug 2024 | 56 | 15 | 0 | 1 | AS |
| Jul 2024 | 62 | 12 | 0 | 0 | AS |
| Jun 2024 | 60 | 17 | 0 | 0 | AS |
| May 2024 | 46 | 9 | 0 | 0 | AS |
| Apr 2024 | 30 | 6 | 0 | 0 | AS |
| Mar 2024 | 31 | 4 | 1 | 0 | AS |
| Nov 2023 | 30 | 2 | 0 | 0 | AS |
| Oct 2023 | 32 | 3 | 0 | 0 | AS |
| Sep 2023 | 60 | 6 | 0 | 0 | AS |
| Aug 2023 | 62 | 10 | 0 | 0 | AS |
| Jul 2023 | 62 | 16 | 0 | 0 | AS |
| Jun 2023 | 45 | 8 | 0 | 0 | AS |
| May 2023 | 31 | 6 | 0 | 0 | AS |
Cancellation Rate
0.4%
4 of 1,088 flights
Diversion Rate
0.2%
2 of 1,088 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
CMH - Columbus
Full on-time, delay-cause, and seasonal performance for Columbus, OH.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See CMH 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 CMH–SEA.
Routes with a similar on-time rate
What the Data Says About CMH to SEA
1,617 tracked flights put the CMH to SEA pairing (Columbus to Seattle) at a 79.8% on-time rate, squarely in line with the wider network. Delays that do occur run 53.7 minutes on average. Across the 2,016-mile route and its 2 carriers, the trailing 24 months show 0.4% cancelled and 0.2% diverted (1,088 flights sampled).
The monthly split is wide on this route: Sep 2023 posted the strongest performance at 90% on-time, while Jul 2025 came in at just 66% - a 24-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from CMH to SEA? ▼
What is the cancellation rate for CMH to SEA? ▼
How far is the flight from CMH to SEA? ▼
When is the best time to fly from CMH to SEA? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
Explore PlainFlights
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.