Route · MKE → SEA · 2020–2025 BTS data
Milwaukee to Seattle
The MKE–SEA corridor (Milwaukee, WI → Seattle, WA) runs ahead of the national average, served by 4 carriers across roughly 1,694 miles.
Data updated 2026-06-13
- 84.7%
- On-time
- +5.7 pts
- vs US avg
- 50 min
- Delay when late
- 2,083
- Flights
Cancelled
0.2%
Best Month
Jul 2024 92%
Worst Month
Jun 2024 80%
Distance
1,694 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 41 | 17 | 0 | 1 | AS |
| Nov 2025 | 33 | 9 | 0 | 0 | AS |
| Oct 2025 | 34 | 8 | 0 | 0 | AS |
| Sep 2025 | 60 | 9 | 1 | 0 | AS |
| Aug 2025 | 62 | 9 | 0 | 0 | AS |
| Jul 2025 | 61 | 12 | 0 | 0 | AS |
| Jun 2025 | 60 | 9 | 1 | 0 | AS |
| May 2025 | 48 | 0 | 0 | 0 | AS |
| Apr 2025 | 30 | 2 | 0 | 0 | AS |
| Nov 2024 | 30 | 4 | 0 | 0 | AS |
| Oct 2024 | 32 | 2 | 0 | 0 | AS |
| Sep 2024 | 48 | 7 | 0 | 0 | AS |
| Aug 2024 | 56 | 10 | 0 | 0 | AS |
| Jul 2024 | 62 | 5 | 0 | 0 | AS |
| Jun 2024 | 60 | 12 | 0 | 0 | AS |
| May 2024 | 47 | 15 | 0 | 0 | AS |
| Apr 2024 | 30 | 1 | 0 | 0 | AS |
| Mar 2024 | 31 | 3 | 0 | 0 | AS |
| Nov 2023 | 30 | 7 | 0 | 0 | AS |
| Oct 2023 | 31 | 2 | 0 | 0 | AS |
| Sep 2023 | 41 | 6 | 0 | 0 | AS |
| Aug 2023 | 45 | 6 | 0 | 1 | AS |
| Jul 2023 | 44 | 3 | 0 | 0 | AS |
| Jun 2023 | 37 | 4 | 0 | 0 | AS |
Cancellation Rate
0.2%
2 of 1,053 flights
Diversion Rate
0.2%
2 of 1,053 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
MKE - Milwaukee
Full on-time, delay-cause, and seasonal performance for Milwaukee, WI.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See MKE 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 MKE–SEA.
Routes with a similar on-time rate
What the Data Says About MKE to SEA
Bureau of Transportation Statistics records show Milwaukee to Seattle (MKE to SEA) running a 84.7% on-time rate over 2,083 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 50.3 minutes. The 1,694-mile corridor is served by 4 carriers, and over the last 24 months 0.2% of 1,053 flights were cancelled, 0.2% diverted.
Monthly performance varies moderately here: Jul 2024 was the strongest month at 92% on-time versus Jun 2024 at 80%, a 12-point difference.
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.