Historical on-time performance
Portland to Washington
482 miData through May 2026Source: US DOT · BTS
Flights on PWM–DCA arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled3.6%of scheduled flights
based on 869 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesbestOn-time74%Medianon timep9045 minCancel2.6%Flights547
- PSA AirlinesOn-time63%Medianon timep9085 minCancel5.3%Flights322
Why flights run late
Delay causes
- Airline25%
- Weather11%
- Air traffic (NAS)19%
- Late aircraft45%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline10%
- Weather81%
- Air traffic (NAS)10%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 31 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 PWM → DCA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 86% on time.
- Mornings86% on time · p90 15 min · 1,090 flights
- Middays77% on time · p90 40 min · 1,184 flights
- Evenings63% on time · p90 80 min · 957 flights
- Afternoons61% on time · p90 85 min · 402 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 81% on time.
- Saturdays81% on time · p90 25 min · 402 flights
- Tuesdays77% on time · p90 40 min · 535 flights
- Thursdays75% on time · p90 50 min · 534 flights
- Wednesdays75% on time · p90 50 min · 538 flights
- Fridays73% on time · p90 60 min · 538 flights
- Sundays71% on time · p90 55 min · 546 flights
- Mondays69% on time · p90 65 min · 540 flights
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