Historical on-time performance
Portland to San Diego
Flights on PDX–SAN arrive on time 79% of the time over the last 12 months.
based on 1,692 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.
- Southwest AirlinesOn-time89%Medianon timep9015 minCancel0.0%Flights61
- Alaska AirlinesOn-time79%Medianon timep9025 minCancel0.7%Flights1,631
Why flights run late
Delay causes
- Airline28%
- Weather1%
- Air traffic (NAS)37%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
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 12 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 → SAN
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 71% to 84% on time.
- Middays84% on time · p90 20 min · 1,105 flights
- Mornings84% on time · p90 20 min · 1,268 flights
- Afternoons83% on time · p90 25 min · 983 flights
- Overnights79% on time · p90 35 min · 775 flights
- Evenings71% on time · p90 35 min · 1,034 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 85% on time.
- Tuesdays85% on time · p90 20 min · 661 flights
- Wednesdays85% on time · p90 20 min · 678 flights
- Saturdays84% on time · p90 25 min · 668 flights
- Mondays82% on time · p90 25 min · 769 flights
- Thursdays78% on time · p90 30 min · 774 flights
- Sundays77% on time · p90 35 min · 842 flights
- Fridays75% on time · p90 35 min · 773 flights
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