Historical on-time performance
Detroit to Portland
1,953 miData through May 2026Source: US DOT · BTS
Flights on DTW–PDX arrive on time 68% of the time over the last 12 months.
On-time rate68%arrived within 15 min
p90 delay45 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-time68%Medianon timep9045 minCancel0.9%Flights339
Why flights run late
Delay causes
- Airline66%
- Weather2%
- Air traffic (NAS)16%
- Late aircraft16%
- Security0%
Most delay minutes here are attributed to Airline.
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 DTW → PDX
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 84% on time.
- Mornings84% on time · p90 20 min · 538 flights
- Evenings69% on time · p90 50 min · 163 flights · limited
- Overnights67% on time · p90 45 min · 337 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 80% on time.
- Tuesdays80% on time · p90 30 min · 132 flights · limited
- Wednesdays79% on time · p90 35 min · 133 flights · limited
- Mondays77% on time · p90 30 min · 148 flights · limited
- Saturdays76% on time · p90 40 min · 133 flights · limited
- Sundays76% on time · p90 50 min · 174 flights · limited
- Fridays76% on time · p90 30 min · 169 flights · limited
- Thursdays72% on time · p90 45 min · 166 flights · limited
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