Philadelphia (PHL) to Portland (PWM): On-Time Performance
Data through July 2026
When you fly PHL to PWM matters as much as anything else about the booking: the route swung from 91% on-time in April 2026 to just 52% in August 2024. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (80% vs 69%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 2.9%
- Flights/day
- 1.8
- last 12 months
- Duration
- 1h 30m
- scheduled
- Distance
- 364 mi
Best airline from PHL to PWM
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| PSA Airlinesmost reliable | 78% | 19 min | 4.7% | 443 |
| American Airlines | 74% | 22 min | 2.2% | 1,215 |
Monthly on-time trend
Best time to fly from PHL to PWM
Aim for departures around 9 a.m. (92% on-time); avoid 7 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 23 min |
| Tuesdaybest | 80% | 17 min |
| Wednesday | 80% | 15 min |
| Thursday | 68% | 26 min |
| Friday | 72% | 18 min |
| Saturday | 73% | 26 min |
| Sunday | 71% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations37%
- National airspace system13%
- Weather4%
Frequently asked questions
- How often are flights from PHL to PWM delayed?
- 26% of PHL–PWM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 21 minutes.
- Which airline is most reliable from PHL to PWM?
- PSA Airlines has the best on-time record on this route at 78%, based on 443 flights. 2 airlines flew PHL–PWM frequently enough to compare in this period.
- What is the best time of day to fly from PHL to PWM?
- Departures around 9 a.m. have the best record (92% on-time), while departures around 7 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PHL to PWM?
- The scheduled PHL–PWM flight time averages 1h 30m over 364 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are PHL to PWM flights cancelled?
- 2.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from PHL to PWM?
- August 2024 was the roughest month in this dataset, with only 52% of arrivals on time. The best was April 2026 at 91%. If your dates are flexible, that 39-point gap is worth planning around.
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Based on 1,722 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.