Historical on-time performance
Denver to San Diego
Flights on DEN–SAN arrive on time 75% of the time over the last 12 months.
based on 5,780 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Alaska AirlinesOn-time81%Medianon timep9035 minCancel1.3%Flights379
- United AirlinesOn-time79%Medianon timep9040 minCancel0.5%Flights2,090
- SkyWest AirlinesOn-time78%Medianon timep9030 minCancel1.5%Flights205
- Frontier AirlinesOn-time78%Medianon timep9045 minCancel0.8%Flights717
- Southwest AirlinesOn-time69%Medianon timep9055 minCancel0.6%Flights2,389
Why flights run late
Delay causes
- Airline32%
- Weather1%
- Air traffic (NAS)23%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline23%
- Weather41%
- Air traffic (NAS)36%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 39 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 DEN → SAN
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 — 86% on time.
- Mornings86% on time · p90 20 min · 4,269 flights
- Middays79% on time · p90 35 min · 4,364 flights
- Afternoons73% on time · p90 45 min · 2,488 flights
- Overnights64% on time · p90 65 min · 2,844 flights
- Evenings63% on time · p90 60 min · 2,912 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 79% on time.
- Tuesdays79% on time · p90 35 min · 2,263 flights
- Wednesdays78% on time · p90 40 min · 2,336 flights
- Saturdays77% on time · p90 35 min · 2,129 flights
- Mondays76% on time · p90 40 min · 2,529 flights
- Sundays72% on time · p90 45 min · 2,539 flights
- Fridays71% on time · p90 55 min · 2,552 flights
- Thursdays71% on time · p90 55 min · 2,529 flights
Keep exploring