Historical on-time performance
Seattle to Milwaukee
1,694 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–MKE arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 430 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time82%Medianon timep9025 minCancel0.0%Flights430
Why flights run late
Delay causes
- Airline42%
- Weather0%
- Air traffic (NAS)20%
- Late aircraft39%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → MKE
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 69% to 85% on time.
- Mornings85% on time · p90 20 min · 958 flights
- Middays81% on time · p90 20 min · 70 flights · limited
- Evenings69% on time · p90 40 min · 277 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 84% on time.
- Wednesdays84% on time · p90 20 min · 181 flights · limited
- Thursdays83% on time · p90 25 min · 214 flights
- Fridays83% on time · p90 20 min · 197 flights · limited
- Mondays82% on time · p90 25 min · 201 flights
- Tuesdays81% on time · p90 20 min · 182 flights · limited
- Sundays80% on time · p90 25 min · 214 flights
- Saturdays78% on time · p90 30 min · 162 flights · limited
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