Historical on-time performance
Denver to Tucson
639 miData through Dec 2025Source: US DOT · BTS
Flights on DEN–TUS arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 2,704 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.
- United AirlinesOn-time80%Medianon timep9035 minCancel0.1%Flights740
- SkyWest AirlinesOn-time80%Medianon timep9045 minCancel0.5%Flights731
- Southwest AirlinesOn-time72%Medianon timep9050 minCancel0.4%Flights1,233
Why flights run late
Delay causes
- Airline30%
- Weather4%
- Air traffic (NAS)14%
- Late aircraft51%
- Security0%
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 DEN → TUS
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 — 86% on time.
- Mornings86% on time · p90 20 min · 1,461 flights
- Middays82% on time · p90 30 min · 1,927 flights
- Afternoons74% on time · p90 50 min · 1,720 flights
- Evenings66% on time · p90 70 min · 1,425 flights
- Overnights63% on time · p90 65 min · 999 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 77% on time.
- Wednesdays77% on time · p90 50 min · 1,074 flights
- Tuesdays76% on time · p90 40 min · 1,071 flights
- Sundays76% on time · p90 40 min · 1,142 flights
- Mondays76% on time · p90 45 min · 1,102 flights
- Saturdays75% on time · p90 45 min · 952 flights
- Thursdays74% on time · p90 50 min · 1,095 flights
- Fridays72% on time · p90 45 min · 1,096 flights
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