Historical on-time performance
Portland to Los Angeles
834 miData through May 2026Source: US DOT · BTS
Flights on PDX–LAX arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 4,228 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time90%Medianon timep9010 minCancel0.9%Flights1,690
- Alaska AirlinesOn-time85%Medianon timep9020 minCancel1.0%Flights1,940
- SkyWest AirlinesOn-time79%Medianon timep9070 minCancel0.3%Flights598
Why flights run late
Delay causes
- Airline52%
- Weather1%
- Air traffic (NAS)8%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline84%
- Weather16%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 37 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 → LAX
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 — 90% on time.
- Mornings90% on time · p90 10 min · 3,903 flights
- Middays89% on time · p90 15 min · 3,976 flights
- Evenings85% on time · p90 25 min · 2,797 flights
- Afternoons85% on time · p90 25 min · 1,467 flights
- Overnights80% on time · p90 30 min · 1,060 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 84% to 90% on time.
- Tuesdays90% on time · p90 10 min · 1,741 flights
- Wednesdays90% on time · p90 10 min · 1,730 flights
- Saturdays89% on time · p90 15 min · 1,628 flights
- Mondays88% on time · p90 20 min · 2,069 flights
- Thursdays86% on time · p90 20 min · 2,021 flights
- Fridays84% on time · p90 20 min · 2,025 flights
- Sundays84% on time · p90 25 min · 1,989 flights
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