Historical on-time performance
Philadelphia to Portland
364 miData through Dec 2025Source: US DOT · BTS
Flights on PHL–PWM arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled2.0%of scheduled flights
based on 662 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.
- PSA AirlinesOn-time81%Medianon timep9020 minCancel3.1%Flights64
- American AirlinesOn-time71%Medianon timep9075 minCancel1.8%Flights598
Why flights run late
Delay causes
- Airline32%
- Weather5%
- Air traffic (NAS)14%
- Late aircraft50%
- 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 PHL → PWM
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 89% on time.
- Mornings89% on time · p90 15 min · 90 flights · limited
- Middays82% on time · p90 35 min · 1,185 flights
- Afternoons74% on time · p90 40 min · 291 flights
- Overnights68% on time · p90 75 min · 671 flights
- Evenings61% on time · p90 90 min · 239 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 82% on time.
- Wednesdays82% on time · p90 30 min · 344 flights
- Tuesdays80% on time · p90 40 min · 355 flights
- Mondays76% on time · p90 50 min · 355 flights
- Fridays74% on time · p90 45 min · 355 flights
- Saturdays72% on time · p90 60 min · 346 flights
- Sundays72% on time · p90 60 min · 358 flights
- Thursdays70% on time · p90 70 min · 363 flights
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