Route · SEA → MCI · 2020–2025 BTS data
Seattle to Kansas City
The SEA–MCI corridor (Seattle, WA → Kansas City, MO) runs ahead of the national average, served by 14 carriers across roughly 1,489 miles.
Data updated 2026-06-13
- 81.5%
- On-time
- +2.5 pts
- vs US avg
- 60 min
- Delay when late
- 5,803
- Flights
Cancelled
1.1%
Best Month
Jan 2025 91%
Worst Month
Jul 2025 57%
Distance
1,489 mi
Carriers
14
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 85 | 21 | 2 | 0 | DL,AS |
| Nov 2025 | 79 | 16 | 0 | 0 | DL,AS |
| Oct 2025 | 88 | 21 | 2 | 0 | AS,DL |
| Sep 2025 | 111 | 30 | 1 | 1 | DL,WN,AS |
| Aug 2025 | 121 | 37 | 1 | 0 | WN,AS,DL |
| Jul 2025 | 127 | 55 | 0 | 1 | AS,DL,WN |
| Jun 2025 | 124 | 42 | 1 | 1 | AS,WN,DL |
| May 2025 | 105 | 25 | 0 | 0 | AS,DL |
| Apr 2025 | 85 | 12 | 1 | 1 | DL,AS |
| Mar 2025 | 78 | 7 | 0 | 0 | AS,DL |
| Feb 2025 | 63 | 11 | 1 | 0 | AS,DL |
| Jan 2025 | 68 | 6 | 5 | 1 | AS,DL |
| Dec 2024 | 85 | 22 | 0 | 0 | AS,DL |
| Nov 2024 | 79 | 14 | 0 | 0 | AS,DL |
| Oct 2024 | 87 | 10 | 0 | 0 | AS,DL |
| Sep 2024 | 116 | 28 | 0 | 0 | WN,AS,DL |
| Aug 2024 | 127 | 30 | 0 | 1 | AS,DL,WN |
| Jul 2024 | 131 | 36 | 3 | 1 | AS,DL,WN |
| Jun 2024 | 128 | 32 | 1 | 0 | AS,DL,WN |
| May 2024 | 109 | 21 | 0 | 0 | AS,DL |
| Apr 2024 | 90 | 27 | 0 | 0 | AS,DL |
| Mar 2024 | 87 | 11 | 0 | 1 | AS,DL |
| Feb 2024 | 67 | 12 | 0 | 0 | AS,DL |
| Jan 2024 | 67 | 16 | 7 | 0 | AS,DL |
Cancellation Rate
1.1%
25 of 2,307 flights
Diversion Rate
0.3%
8 of 2,307 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 →MCI - Kansas City
Full on-time, delay-cause, and seasonal performance for Kansas City, MO.
Destination airport →Compare the two airports
See SEA and MCI 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–MCI.
Routes with a similar on-time rate
What the Data Says About SEA to MCI
5,803 tracked flights put the SEA to MCI pairing (Seattle to Kansas City) at a 81.5% on-time rate, squarely in line with the wider network. Delays that do occur run 60.0 minutes on average. Across the 1,489-mile route and its 14 carriers, the trailing 24 months show 1.1% cancelled and 0.3% diverted (2,307 flights sampled).
The monthly split is wide on this route: Jan 2025 posted the strongest performance at 91% on-time, while Jul 2025 came in at just 57% - a 35-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.