Historical on-time performance
Boston to Portland
Flights on BOS–PDX arrive on time 74% 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-time77%Medianon timep9035 minCancel1.0%Flights511
- JetBlue AirwaysOn-time55%Median5 minp90105 minCancel1.1%Flights92
Why flights run late
Delay causes
- Airline24%
- Weather1%
- Air traffic (NAS)30%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline50%
- Weather33%
- Air traffic (NAS)17%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 6 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 BOS → PDX
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 — 85% on time.
- Mornings85% on time · p90 20 min · 551 flights
- Evenings68% on time · p90 65 min · 1,171 flights
- Afternoons66% on time · p90 45 min · 101 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 80% on time.
- Saturdays80% on time · p90 30 min · 247 flights
- Wednesdays80% on time · p90 35 min · 253 flights
- Tuesdays77% on time · p90 40 min · 255 flights
- Mondays72% on time · p90 50 min · 295 flights
- Sundays71% on time · p90 50 min · 274 flights
- Fridays70% on time · p90 65 min · 301 flights
- Thursdays68% on time · p90 65 min · 280 flights
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