OnTimeRoutes
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United Airlines DEN to PIT on-time performance

United Airlines nonstop flights from Denver to Pittsburgh · Aug 2025 – Jul 2026

On-time arrivals
81%
arrived < 15 min late
Cancelled
0.5%
4 flights
Avg arrival delay
12 min
57 min when late
Rank on route
#2 of 3
route average 74% on time

Key facts

  • United Airlines flights on DEN to PIT arrived on time 81% of the time in Aug 2025 – Jul 2026.
  • 0.5% were cancelled, and 5% arrived an hour or more late.
  • That ranks #2 of 3 airlines on this route, which averaged 74% on time overall.
  • The largest source of delay minutes was late-arriving aircraft (55%).

On-time trend by month

50%75%100%July 2025: 61.5% on time, 1.1% cancelledJul ’25August 2025: 66.3% on time, 1.1% cancelledAug ’25September 2025: 80.0% on time, 0.0% cancelledSep ’25October 2025: 91.4% on time, 0.0% cancelledOct ’25November 2025: 85.2% on time, 0.0% cancelledNov ’25December 2025: 88.9% on time, 0.0% cancelledDec ’25January 2026: 81.7% on time, 3.2% cancelledJan ’26February 2026: 92.9% on time, 0.0% cancelledFeb ’26March 2026: 68.9% on time, 1.6% cancelledMar ’26April 2026: 86.7% on time, 0.0% cancelledApr ’26May 2026: 83.9% on time, 0.0% cancelledMay ’26June 2026: 75.0% on time, 0.0% cancelledJun ’26July 2026: 70.0% on time, 0.0% cancelledJul ’26
On-time arrival rate by month. Hover a bar for exact figures.

Why this airline's flights were late

  • Late-arriving aircraft55%
  • Airline (crew, maintenance, cleaning, fueling)25%
  • Air traffic control & airport congestion18%
  • Extreme weather2%
  • Security0%

Other airlines on DEN to PIT

850 United Airlines flights tracked on this route; 4 cancelled, 1 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.