Historical on-time performance
Atlanta to Portland
1,027 miData through May 2026Source: US DOT · BTS
Flights on ATL–PWM arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 613 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time74%Medianon timep9050 minCancel1.1%Flights613
Why flights run late
Delay causes
- Airline44%
- Weather7%
- Air traffic (NAS)17%
- Late aircraft33%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline29%
- Weather71%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 7 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 ATL → PWM
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 75% to 86% on time.
- Middays86% on time · p90 20 min · 220 flights
- Mornings81% on time · p90 20 min · 313 flights
- Overnights79% on time · p90 35 min · 775 flights
- Evenings75% on time · p90 45 min · 317 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 83% on time.
- Mondays83% on time · p90 30 min · 239 flights
- Wednesdays82% on time · p90 25 min · 239 flights
- Tuesdays82% on time · p90 30 min · 238 flights
- Thursdays80% on time · p90 30 min · 241 flights
- Fridays79% on time · p90 35 min · 241 flights
- Saturdays78% on time · p90 40 min · 255 flights
- Sundays68% on time · p90 50 min · 242 flights
Keep exploring