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Flight Reliability

UA 5488 · United Airlines

Denver → GJT (DEN–GJT)87% of its flights flew this route. The rest (SNA–SFO, ORD–ABE) are included in these numbers.

79
Usually Fine
WanderNerd Reliability Score
82%
Arrive within 15 minutes
2 min
Average arrival delay
2.8%
Cancelled
8 min early
Median arrival delay

Based on 361 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

UA 5488 departing between 12–3 PM arrived on time 86% of the time, versus 36% between 6–9 AM.

Friday is doing you no favors.

UA 5488 arrived on time 90% of the time on Saturdays and just 75% on Fridays. That gap is worth planning around.

A bit ahead of the United Airlines network.

UA 5488 arrived on time 82% of the time, versus 79% across the United Airlines network.

Trending in the right direction.

UA 5488 arrived on time 87% of the time over the last three months in the data, compared with 77% in the three months before that.

The breakdown

On-time by weekday
  • Mon78%(51 flights)
  • Tue80%(50 flights)
  • Wed88%(51 flights)
  • Thu77%(51 flights)
  • Fri75%(48 flights)
  • Sat90%(50 flights)
  • Sun86%(50 flights)
On-time by departure window
  • 6–9 AM36%(14 flights)
  • 9 AM–12 PM68%(31 flights)
  • 12–3 PM86%(306 flights)
On-time trend by month
90%
May

Jun 70% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%30
July 202568%31
August 202577%31
September 202589%28
October 2025100%31
November 202592%24
December 202564%28
January 202681%31
February 202685%27
March 202690%29
April 202680%30
May 202690%31
Departures on time
85%
Diverted
0%
Flights flown
351
Months covered
12

Same route, other flights

Keep nerding

Based on 361 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.