Historical on-time performance
San Antonio to Denver
Flights on SAT–DEN arrive on time 81% of the time over the last 12 months.
based on 2,864 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.
- Frontier AirlinesOn-time82%Medianon timep9035 minCancel0.4%Flights224
- Southwest AirlinesOn-time81%Medianon timep9030 minCancel0.3%Flights1,433
- United AirlinesOn-time80%Medianon timep9050 minCancel0.5%Flights1,207
Why flights run late
Delay causes
- Airline32%
- Weather2%
- Air traffic (NAS)35%
- Late aircraft32%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline50%
- Weather17%
- Air traffic (NAS)33%
- 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 SAT → DEN
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 · 3,194 flights
- Middays86% on time · p90 20 min · 2,776 flights
- Afternoons73% on time · p90 65 min · 1,779 flights
- Overnights67% on time · p90 60 min · 622 flights
- Evenings64% on time · p90 60 min · 929 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 84% on time.
- Wednesdays84% on time · p90 25 min · 1,232 flights
- Mondays83% on time · p90 30 min · 1,376 flights
- Saturdays83% on time · p90 30 min · 1,222 flights
- Tuesdays82% on time · p90 35 min · 1,273 flights
- Sundays81% on time · p90 35 min · 1,377 flights
- Thursdays79% on time · p90 35 min · 1,425 flights
- Fridays79% on time · p90 40 min · 1,395 flights
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