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Flight Reliability

UA 4719 · United Airlines

Colorado Springs → Denver (COS–DEN)92% of its flights flew this route. The rest (BOI–DEN, IAH–PNS) are included in these numbers.

55
A Little Dicey
WanderNerd Reliability Score
63%
Arrive within 15 minutes
24 min
Average arrival delay
2.5%
Cancelled
6 min
Median arrival delay

Based on 356 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 4719 departing between 9 AM–12 PM arrived on time 88% of the time, versus 55% between 12–3 PM.

Tuesdays have been rough.

UA 4719 arrived on time 73% of the time on Saturdays and just 51% on Tuesdays. That gap is worth planning around.

Lagging the COS–DEN route.

UA 4719 arrived on time 63% of the time, versus 78% across the COS–DEN route.

Well behind the United Airlines network.

UA 4719 arrived on time 63% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon71%(51 flights)
  • Tue51%(51 flights)
  • Wed69%(51 flights)
  • Thu63%(49 flights)
  • Fri54%(50 flights)
  • Sat73%(44 flights)
  • Sun65%(51 flights)
On-time by departure window
  • 9 AM–12 PM88%(16 flights)
  • 12–3 PM55%(11 flights)
  • 3–6 PM62%(319 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
74%
May

Jun 43% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202543%30
July 202535%29
August 202539%31
September 202555%29
October 202552%27
November 202574%19
December 202577%31
January 202674%31
February 202664%28
March 202681%31
April 202693%30
May 202674%31
Departures on time
65%
Diverted
0%
Flights flown
347
Months covered
12

Same route, other flights

Keep nerding

Based on 356 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.