Route
MKE → SEA
General Mitchell International Airport Seattle–Tacoma International Airport
1,694 miles
Return route SEA → MKE →
How punctual is this route?
- On-time arrivals
- 80.6%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 44 min
- Flights arriving 15+ minutes late
- Flights tracked
- 509
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 39%
- Airline (crew, maintenance, cleaning) 32%
- Late-arriving aircraft 14%
- Extreme weather 12%
- Security 2%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.7% | 60 |
| October 2025 | 76.5% | 34 |
| November 2025 | 72.7% | 33 |
| December 2025 | 57.5% | 41 |
| January 2026 | 60.0% | 25 |
| February 2026 | 77.8% | 18 |
| March 2026 | 64.0% | 26 |
| April 2026 | 100.0% | 35 |
| May 2026 | 89.1% | 55 |
| June 2026 | 83.1% | 59 |
| July 2026 | 85.2% | 61 |
| August 2026 | 88.7% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 509 | 80.6% | 0.4% | 44 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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