United Airlines TUS to DEN on-time performance
United Airlines nonstop flights from Tucson to Denver · Aug 2025 – Jul 2026
On-time arrivals
86%
arrived < 15 min late
Cancelled
0.5%
4 flights
Avg arrival delay
11 min
75 min when late
Rank on route
#2 of 4
route average 83% on time
Key facts
- United Airlines flights on TUS to DEN arrived on time 86% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 5% arrived an hour or more late.
- That ranks #2 of 4 airlines on this route, which averaged 83% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (35%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion35%
- Airline (crew, maintenance, cleaning, fueling)33%
- Late-arriving aircraft26%
- Extreme weather6%
- Security0%
Other airlines on TUS to DEN
- Southwest Airlines80% on time · 13 min avg delay
- SkyWest Airlines86% on time · 14 min avg delay
- Frontier Airlines81% on time · 10 min avg delay
Full TUS to DEN comparison →
United Airlines on-time record across all routes →
866 United Airlines flights tracked on this route; 4 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.