Historical on-time performance
Portland to Boston
Flights on PDX–BOS arrive on time 77% of the time over the last 12 months.
based on 603 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- Alaska AirlinesOn-time81%Medianon timep9025 minCancel0.6%Flights511
- JetBlue AirwaysOn-time59%Medianon timep9095 minCancel1.1%Flights92
Why flights run late
Delay causes
- Airline33%
- Weather0%
- Air traffic (NAS)33%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline25%
- Weather50%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 4 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 PDX → BOS
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 — 82% on time.
- Mornings82% on time · p90 25 min · 819 flights
- Overnights70% on time · p90 60 min · 726 flights
- Middays69% on time · p90 75 min · 308 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 78% on time.
- Sundays78% on time · p90 40 min · 298 flights
- Saturdays77% on time · p90 35 min · 224 flights
- Wednesdays77% on time · p90 40 min · 266 flights
- Mondays76% on time · p90 40 min · 294 flights
- Tuesdays75% on time · p90 45 min · 228 flights
- Fridays72% on time · p90 70 min · 299 flights
- Thursdays71% on time · p90 50 min · 298 flights
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