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Flight Reliability

UA 5127 · United Airlines

PRC → Denver (PRC–DEN)83% of its flights flew this route. The rest (DEN–EAR, ORD–DEC) are included in these numbers.

82
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
7 min
Average arrival delay
1.5%
Cancelled
7 min early
Median arrival delay

Based on 410 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 5127 departing between 9 AM–12 PM arrived on time 88% of the time, versus 58% between 3–6 PM.

Friday is doing you no favors.

UA 5127 arrived on time 88% of the time on Sundays. On Fridays: 77%.

A bit ahead of the United Airlines network.

UA 5127 arrived on time 82% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon82%(61 flights)
  • Tue77%(52 flights)
  • Wed80%(51 flights)
  • Thu83%(58 flights)
  • Fri77%(60 flights)
  • Sat88%(59 flights)
  • Sun88%(60 flights)
On-time by departure window
  • 6–9 AM83%(177 flights)
  • 9 AM–12 PM88%(142 flights)
  • 12–3 PM84%(44 flights)
  • 3–6 PM58%(38 flights)
On-time trend by month
100%
May

Jun 62% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%29
July 202577%30
August 202580%44
September 202590%29
October 202594%31
November 202597%30
December 202577%31
January 202687%30
February 202679%28
March 202659%29
April 202682%50
May 2026100%40
Departures on time
84%
Diverted
0.7%
Flights flown
401
Months covered
12

Same route, other flights

Keep nerding

Based on 410 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.