Historical on-time performance
Detroit to Portland
668 miData through Dec 2025Source: US DOT · BTS
Flights on DTW–PWM arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 388 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-time86%Medianon timep9030 minCancel0.6%Flights354
- SkyWest AirlinesOn-time71%Medianon timep9060 minCancel0.0%Flights34
Why flights run late
Delay causes
- Airline57%
- Weather8%
- Air traffic (NAS)17%
- Late aircraft18%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DTW → PWM
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 78% to 84% on time.
- Middays84% on time · p90 30 min · 430 flights
- Overnights80% on time · p90 40 min · 698 flights
- Afternoons78% on time · p90 45 min · 580 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 85% on time.
- Wednesdays85% on time · p90 25 min · 238 flights
- Saturdays83% on time · p90 30 min · 256 flights
- Tuesdays82% on time · p90 45 min · 239 flights
- Fridays81% on time · p90 45 min · 249 flights
- Thursdays80% on time · p90 35 min · 245 flights
- Mondays79% on time · p90 45 min · 254 flights
- Sundays72% on time · p90 50 min · 249 flights
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