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Route Reliability

GUC → Denver

GUC–DEN · 152 miles · GUC Airport to Denver International Airport

83
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
7 min
Average arrival delay
0.8%
Cancelled
994
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 79% of the time across 994 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

GUC–DEN flights departing between 12–3 PM arrived on time 87% of the time, versus 66% between 3–6 PM.

Skip Saturday if you can.

GUC–DEN flights arrived on time 85% of the time on Sundays. On Saturdays: 73%.

Trending in the right direction.

GUC–DEN flights arrived on time 92% of the time over the last three months in the data, compared with 82% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon76%(140 flights)
  • Tue80%(139 flights)
  • Wed82%(141 flights)
  • Thu79%(140 flights)
  • Fri80%(142 flights)
  • Sat73%(139 flights)
  • Sun85%(142 flights)
On-time by departure window
  • 6–9 AM82%(361 flights)
  • 12–3 PM87%(359 flights)
  • 3–6 PM66%(263 flights)
On-time trend by month
86%
May

Jun 60% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%89
July 202557%92
August 202569%90
September 202581%90
October 202581%87
November 202593%58
December 202577%75
January 202690%92
February 202680%84
March 202693%88
April 202695%65
May 202686%73

Keep nerding

Based on 994 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.