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Flight Reliability

UA 655 · United Airlines

Denver → Las Vegas (DEN–LAS)81% of its flights flew this route. The rest (LAS–EWR, LAS–SFO) are included in these numbers.

77
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
12 min
Average arrival delay
0.7%
Cancelled
3 min early
Median arrival delay

Based on 447 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 655 departing between 9 PM–12 AM arrived on time 93% of the time, versus 71% between 6–9 PM.

Thursdays have been rough.

UA 655 arrived on time 84% of the time on Wednesdays and just 64% on Thursdays. That gap is worth planning around.

A bit behind the United Airlines network.

UA 655 arrived on time 74% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon82%(62 flights)
  • Tue67%(55 flights)
  • Wed84%(63 flights)
  • Thu64%(64 flights)
  • Fri66%(67 flights)
  • Sat78%(59 flights)
  • Sun78%(72 flights)
On-time by departure window
  • 12–3 PM83%(23 flights)
  • 6–9 PM71%(361 flights)
  • 9 PM–12 AM93%(58 flights)
On-time trend by month
64%
May

Jun 73% → May 64% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%62
July 202547%38
August 202571%45
September 202570%30
October 202571%31
November 202583%29
December 202584%31
January 202687%31
February 202671%28
March 202681%31
April 202692%47
May 202664%39
Departures on time
75%
Diverted
0.4%
Flights flown
442
Months covered
12

Same route, other flights

Keep nerding

Based on 447 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.