Route · SEA → MKE · 2020–2025 BTS data
Seattle to Milwaukee
The SEA–MKE corridor (Seattle, WA → Milwaukee, WI) runs ahead of the national average, served by 4 carriers across roughly 1,694 miles.
Data updated 2026-06-13
- 84.2%
- On-time
- +5.2 pts
- vs US avg
- 50 min
- Delay when late
- 2,082
- Flights
Cancelled
0.0%
Best Month
Jun 2024 87%
Worst Month
Aug 2024 70%
Distance
1,694 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 42 | 9 | 0 | 0 | AS |
| Nov 2025 | 33 | 7 | 0 | 0 | AS |
| Oct 2025 | 33 | 1 | 0 | 0 | AS |
| Sep 2025 | 60 | 12 | 0 | 0 | AS |
| Aug 2025 | 62 | 11 | 0 | 1 | AS |
| Jul 2025 | 61 | 13 | 0 | 0 | AS |
| Jun 2025 | 60 | 9 | 0 | 1 | AS |
| May 2025 | 49 | 9 | 0 | 0 | AS |
| Apr 2025 | 30 | 3 | 0 | 0 | AS |
| Nov 2024 | 30 | 2 | 0 | 0 | AS |
| Oct 2024 | 31 | 3 | 0 | 0 | AS |
| Sep 2024 | 48 | 9 | 0 | 0 | AS |
| Aug 2024 | 56 | 17 | 0 | 0 | AS |
| Jul 2024 | 62 | 17 | 0 | 0 | AS |
| Jun 2024 | 60 | 8 | 0 | 0 | AS |
| May 2024 | 48 | 10 | 0 | 0 | AS |
| Apr 2024 | 30 | 6 | 0 | 0 | AS |
| Mar 2024 | 31 | 1 | 0 | 0 | AS |
| Nov 2023 | 30 | 5 | 0 | 0 | AS |
| Oct 2023 | 31 | 5 | 0 | 0 | AS |
| Sep 2023 | 41 | 10 | 0 | 0 | AS |
| Aug 2023 | 45 | 7 | 0 | 1 | AS |
| Jul 2023 | 44 | 4 | 0 | 0 | AS |
| Jun 2023 | 37 | 10 | 0 | 0 | AS |
Cancellation Rate
0.0%
0 of 1,054 flights
Diversion Rate
0.3%
3 of 1,054 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 →MKE - Milwaukee
Full on-time, delay-cause, and seasonal performance for Milwaukee, WI.
Destination airport →Compare the two airports
See SEA and MKE 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–MKE.
Routes with a similar on-time rate
What the Data Says About SEA to MKE
Bureau of Transportation Statistics records show Seattle to Milwaukee (SEA to MKE) running a 84.2% on-time rate over 2,082 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 49.6 minutes. The 1,694-mile corridor is served by 4 carriers, and over the last 24 months 0.0% of 1,054 flights were cancelled, 0.3% diverted.
The monthly split is wide on this route: Jun 2024 posted the strongest performance at 87% on-time, while Aug 2024 came in at just 70% - a 17-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to MKE? ▼
What is the cancellation rate for SEA to MKE? ▼
How far is the flight from SEA to MKE? ▼
When is the best time to fly from SEA to MKE? ▼
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.