Historical on-time performance
Milwaukee to Seattle
1,694 miData through May 2026Source: US DOT · BTS
Flights on MKE–SEA arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 441 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time81%Medianon timep9025 minCancel0.5%Flights441
Why flights run late
Delay causes
- Airline41%
- Weather5%
- Air traffic (NAS)38%
- Late aircraft16%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline50%
- Weather50%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 2 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly MKE → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 15 min · 341 flights
- Afternoons82% on time · p90 20 min · 978 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 82% to 86% on time.
- Thursdays86% on time · p90 15 min · 220 flights
- Sundays85% on time · p90 20 min · 221 flights
- Saturdays85% on time · p90 20 min · 168 flights · limited
- Wednesdays83% on time · p90 30 min · 178 flights · limited
- Tuesdays83% on time · p90 25 min · 180 flights · limited
- Fridays83% on time · p90 25 min · 207 flights
- Mondays82% on time · p90 20 min · 205 flights
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