Historical on-time performance
Seattle to Detroit
Flights on SEA–DTW arrive on time 83% of the time over the last 12 months.
based on 2,053 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.
- Delta Air LinesOn-time83%Medianon timep9025 minCancel1.1%Flights1,544
- Alaska AirlinesOn-time80%Medianon timep9025 minCancel0.2%Flights509
Why flights run late
Delay causes
- Airline49%
- Weather2%
- Air traffic (NAS)15%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline72%
- Weather28%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 18 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 SEA → DTW
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 80% to 88% on time.
- Mornings88% on time · p90 15 min · 2,348 flights
- Afternoons88% on time · p90 15 min · 634 flights
- Middays80% on time · p90 30 min · 1,538 flights
- Overnights80% on time · p90 25 min · 1,675 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 88% on time.
- Tuesdays88% on time · p90 15 min · 844 flights
- Wednesdays87% on time · p90 20 min · 861 flights
- Saturdays85% on time · p90 20 min · 820 flights
- Thursdays83% on time · p90 25 min · 913 flights
- Mondays83% on time · p90 25 min · 919 flights
- Fridays82% on time · p90 25 min · 935 flights
- Sundays81% on time · p90 30 min · 923 flights
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