Historical on-time performance
San Jose to Portland
569 miData through May 2026Source: US DOT · BTS
Flights on SJC–PDX arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 1,501 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time94%Medianon timep90on timeCancel0.0%Flights32
- SkyWest AirlinesbestOn-time94%Medianon timep90on timeCancel0.0%Flights470
- Southwest AirlinesOn-time80%Medianon timep9035 minCancel0.0%Flights999
Why flights run late
Delay causes
- Airline24%
- Weather1%
- Air traffic (NAS)4%
- Late aircraft71%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline60%
- Weather40%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 89 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 SJC → 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 — 95% on time.
- Mornings95% on time · p90 5 min · 1,518 flights
- Middays90% on time · p90 10 min · 1,895 flights
- Afternoons79% on time · p90 30 min · 1,012 flights
- Evenings79% on time · p90 40 min · 1,232 flights
- Overnights74% on time · p90 45 min · 745 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 89% on time.
- Wednesdays89% on time · p90 15 min · 885 flights
- Saturdays89% on time · p90 15 min · 645 flights
- Tuesdays88% on time · p90 15 min · 889 flights
- Mondays85% on time · p90 20 min · 1,022 flights
- Thursdays84% on time · p90 25 min · 1,016 flights
- Fridays83% on time · p90 30 min · 1,023 flights
- Sundays81% on time · p90 25 min · 922 flights
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