Historical on-time performance
Portland to Detroit
1,953 miData through May 2026Source: US DOT · BTS
Flights on PDX–DTW arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 339 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time78%Medianon timep9030 minCancel0.9%Flights339
Why flights run late
Delay causes
- Airline33%
- Weather0%
- Air traffic (NAS)8%
- Late aircraft60%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline100%
- Weather0%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 3 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 PDX → DTW
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 85% on time.
- Middays85% on time · p90 20 min · 539 flights
- Overnights80% on time · p90 30 min · 512 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 90% on time.
- Tuesdays90% on time · p90 10 min · 132 flights · limited
- Fridays85% on time · p90 20 min · 172 flights · limited
- Mondays85% on time · p90 20 min · 149 flights · limited
- Wednesdays84% on time · p90 15 min · 132 flights · limited
- Saturdays83% on time · p90 25 min · 133 flights · limited
- Thursdays78% on time · p90 35 min · 166 flights · limited
- Sundays76% on time · p90 40 min · 171 flights · limited
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