Historical on-time performance
Portland to Detroit
1,953 miData through Dec 2025Source: 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)
Cancelled0.6%of scheduled flights
based on 309 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 minCancel0.6%Flights309
Why flights run late
Delay causes
- Airline23%
- Weather0%
- Air traffic (NAS)12%
- Late aircraft64%
- Security0%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 81% to 85% on time.
- Middays85% on time · p90 20 min · 535 flights
- Overnights81% on time · p90 30 min · 427 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 92% on time.
- Tuesdays92% on time · p90 10 min · 120 flights · limited
- Fridays87% on time · p90 20 min · 159 flights · limited
- Mondays86% on time · p90 20 min · 137 flights · limited
- Wednesdays84% on time · p90 15 min · 120 flights · limited
- Saturdays83% on time · p90 25 min · 120 flights · limited
- Thursdays79% on time · p90 30 min · 153 flights · limited
- Sundays76% on time · p90 45 min · 157 flights · limited
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