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Flight Reliability

UA 5291 · United Airlines

Colorado Springs → Denver (COS–DEN)93% of its flights flew this route. The rest (DEN–MSP, ORD–ATW) are included in these numbers.

86
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
3 min early
Average arrival delay
2.0%
Cancelled
12 min early
Median arrival delay

Based on 350 historical flights. Data through May 2026.

What the data says

The 3–6 AM departure wins.

UA 5291 departing between 3–6 AM arrived on time 96% of the time, versus 84% between 6–9 AM.

Saturday is the weak spot.

UA 5291 arrived on time 92% of the time on Tuesdays. On Saturdays: 82%.

Better than the COS–DEN route average.

UA 5291 arrived on time 86% of the time, versus 78% across the COS–DEN route.

Better than the United Airlines network average.

UA 5291 arrived on time 86% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon82%(50 flights)
  • Tue92%(47 flights)
  • Wed83%(47 flights)
  • Thu86%(51 flights)
  • Fri92%(47 flights)
  • Sat82%(49 flights)
  • Sun89%(52 flights)
On-time by departure window
  • 3–6 AM96%(74 flights)
  • 6–9 AM84%(267 flights)
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM—(1 flights)
On-time trend by month
97%
May

Jun 77% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202584%31
August 202571%31
September 202587%30
October 202593%29
November 202580%15
December 202587%30
January 202697%29
February 202696%27
March 202681%31
April 202686%29
May 202697%31
Departures on time
88%
Diverted
0%
Flights flown
343
Months covered
12

Same route, other flights

Keep nerding

Based on 350 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.