MKE to SEA flight delays & on-time performance
Nonstop flights from General Mitchell International Airport to Seattle–Tacoma International Airport · 1,694 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MKE or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Milwaukee (MKE) to Seattle (SEA) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.4% were cancelled, and 3% arrived an hour or more late.
- Alaska Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 6am did best (91% on time); around 4pm did worst (76%).
- Saturday was the most reliable day to fly (86% on time) and Tuesday the least (68%).
- The largest source of delay minutes was air traffic control & airport congestion (38%).
Which airline is most on time from MKE to SEA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Alaska Airlines | 80% | 0.4% | 9 min | 3.0% | 509 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am91%116 flights
- 7am81%67 flights
- 2pm76%92 flights
- 3pm76%201 flights
- 4pm76%33 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%1.3% cancelled
- Tuesday68%0.0% cancelled
- Wednesday81%0.0% cancelled
- Thursday83%1.3% cancelled
- Friday77%0.0% cancelled
- Saturday86%0.0% cancelled
- Sunday86%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion38%
- Airline (crew, maintenance, cleaning, fueling)35%
- Late-arriving aircraft16%
- Extreme weather9%
- Security2%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
MKE to SEA: common questions
- How often are MKE to SEA flights on time?
- 80% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Milwaukee to Seattle cancelled?
- 0.4% of scheduled flights were cancelled (2 of 509).
- How long are typical delays?
- Across all flights the average arrival delay was 9 min (early arrivals count as zero). Flights that were late arrived 38 min behind schedule on average, and 3.0% of flights were an hour or more late.
- How long is taxi time at MKE?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to MKE — 86% on time
More flights from Milwaukee
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MKE → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.