Historical on-time performance
San Diego to Portland
933 miData through Dec 2025Source: US DOT · BTS
Flights on SAN–PDX arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 1,627 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time84%Medianon timep9020 minCancel1.1%Flights1,627
Why flights run late
Delay causes
- Airline24%
- Weather0%
- Air traffic (NAS)15%
- Late aircraft60%
- Security1%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAN → PDX
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 92% on time.
- Mornings92% on time · p90 10 min · 1,230 flights
- Afternoons83% on time · p90 25 min · 1,001 flights
- Middays79% on time · p90 30 min · 1,107 flights
- Evenings77% on time · p90 35 min · 993 flights
- Overnights70% on time · p90 50 min · 698 flights
Best day of week
Tuesdays are the most reliable day to fly this route — 89% on time.
- Tuesdays89% on time · p90 10 min · 661 flights
- Saturdays83% on time · p90 25 min · 647 flights
- Wednesdays83% on time · p90 25 min · 675 flights
- Mondays80% on time · p90 25 min · 755 flights
- Thursdays80% on time · p90 25 min · 748 flights
- Fridays79% on time · p90 30 min · 749 flights
- Sundays76% on time · p90 35 min · 794 flights
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