Historical on-time performance
Detroit to Seattle
Flights on DTW–SEA arrive on time 72% of the time over the last 12 months.
based on 2,057 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Alaska AirlinesOn-time74%Medianon timep9040 minCancel0.4%Flights510
- Delta Air LinesOn-time72%Medianon timep9040 minCancel1.1%Flights1,547
Why flights run late
Delay causes
- Airline41%
- Weather3%
- Air traffic (NAS)30%
- Late aircraft26%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline74%
- Weather26%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 19 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 DTW → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
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 · 1,872 flights
- Middays85% on time · p90 25 min · 1,095 flights
- Afternoons79% on time · p90 30 min · 1,452 flights
- Evenings76% on time · p90 40 min · 1,014 flights
- Overnights69% on time · p90 50 min · 789 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 84% on time.
- Tuesdays84% on time · p90 20 min · 836 flights
- Saturdays82% on time · p90 30 min · 816 flights
- Wednesdays81% on time · p90 30 min · 862 flights
- Sundays80% on time · p90 35 min · 932 flights
- Mondays79% on time · p90 35 min · 924 flights
- Thursdays79% on time · p90 30 min · 919 flights
- Fridays77% on time · p90 35 min · 933 flights
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