Historical on-time performance
Portland to San Jose
569 miData through May 2026Source: US DOT · BTS
Flights on PDX–SJC arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.1%of scheduled flights
based on 1,506 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time91%Medianon timep9010 minCancel0.0%Flights32
- SkyWest AirlinesbestOn-time87%Medianon timep9020 minCancel0.0%Flights475
- Southwest AirlinesOn-time77%Medianon timep9035 minCancel0.2%Flights999
Why flights run late
Delay causes
- Airline28%
- Weather2%
- Air traffic (NAS)5%
- Late aircraft65%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline50%
- Weather50%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 2 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 → SJC
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 — 95% on time.
- Mornings95% on time · p90 5 min · 1,904 flights
- Middays86% on time · p90 20 min · 1,300 flights
- Afternoons85% on time · p90 20 min · 1,489 flights
- Overnights74% on time · p90 50 min · 838 flights
- Evenings73% on time · p90 40 min · 892 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 91% on time.
- Saturdays91% on time · p90 10 min · 626 flights
- Wednesdays88% on time · p90 15 min · 895 flights
- Tuesdays86% on time · p90 20 min · 901 flights
- Mondays86% on time · p90 20 min · 1,033 flights
- Thursdays83% on time · p90 30 min · 1,015 flights
- Sundays83% on time · p90 25 min · 923 flights
- Fridays80% on time · p90 35 min · 1,030 flights
Keep exploring