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Flight Reliability

UA 5861 · United Airlines

Denver → Colorado Springs (DEN–COS)96% of its flights flew this route. The rest (TYS–DEN) are included in these numbers.

66
Usually Fine
WanderNerd Reliability Score
67%
Arrive within 15 minutes
22 min
Average arrival delay
0.8%
Cancelled
3 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

UA 5861 departing between 3–6 PM arrived on time 73% of the time, versus 40% between 6–9 PM.

Friday is doing you no favors.

UA 5861 arrived on time 73% of the time on Wednesdays and just 56% on Fridays. That gap is worth planning around.

Lagging the DEN–COS route.

UA 5861 arrived on time 67% of the time, versus 76% across the DEN–COS route.

Lagging the United Airlines network.

UA 5861 arrived on time 67% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon71%(52 flights)
  • Tue65%(51 flights)
  • Wed73%(52 flights)
  • Thu64%(50 flights)
  • Fri56%(52 flights)
  • Sat71%(51 flights)
  • Sun70%(53 flights)
On-time by departure window
  • 3–6 PM73%(298 flights)
  • 6–9 PM40%(63 flights)
On-time trend by month
65%
May

Jun 50% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%30
July 202535%29
August 202543%30
September 202573%30
October 202581%31
November 2025100%29
December 202581%31
January 202658%31
February 202671%28
March 202674%31
April 202673%30
May 202665%31
Departures on time
72%
Diverted
0%
Flights flown
361
Months covered
12

Same route, other flights

Keep nerding

Based on 364 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.