Portland (PWM) to Atlanta (ATL): On-Time Performance
Data through July 2026
When you fly PWM to ATL matters as much as anything else about the booking: the route swung from 97% on-time in April 2026 to just 61% in June 2025. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 57%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 1.8
- last 12 months
- Duration
- 2h 59m
- scheduled
- Distance
- 1,027 mi
Monthly on-time trend
Best time to fly from PWM to ATL
Aim for departures around 6 a.m. (89% on-time); avoid 6 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 11 min |
| Tuesday | 79% | 18 min |
| Wednesdaybest | 84% | 10 min |
| Thursday | 78% | 12 min |
| Friday | 83% | 18 min |
| Saturday | 78% | 36 min |
| Sunday | 75% | 22 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft17%
- Airline operations61%
- National airspace system19%
- Weather3%
Frequently asked questions
- How often are flights from PWM to ATL delayed?
- 21% of PWM–ATL 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 18 minutes.
- What is the best time of day to fly from PWM to ATL?
- Departures around 6 a.m. have the best record (89% on-time), while departures around 6 p.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PWM to ATL?
- The scheduled PWM–ATL flight time averages 2h 59m over 1,027 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are PWM to ATL flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from PWM to ATL?
- June 2025 was the roughest month in this dataset, with only 61% of arrivals on time. The best was April 2026 at 97%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 1,295 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.