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Flight Reliability

UA 5600 · United Airlines

Denver → PIA (DEN–PIA)81% of its flights flew this route. The rest (GEG–SFO, ORD–OKC) are included in these numbers.

60
A Little Dicey
WanderNerd Reliability Score
61%
Arrive within 15 minutes
18 min
Average arrival delay
0.6%
Cancelled
7 min
Median arrival delay

Based on 329 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

UA 5600 departing between 12–3 PM arrived on time 74% of the time, versus 56% between 6–9 AM.

Mondays have been rough.

UA 5600 arrived on time 71% of the time on Wednesdays and just 55% on Mondays. That gap is worth planning around.

Well behind the United Airlines network.

UA 5600 arrived on time 61% of the time, versus 79% across the United Airlines network.

Recent months have been rougher.

UA 5600 arrived on time 62% of the time over the last three months in the data, compared with 74% in the three months before that.

The breakdown

On-time by weekday
  • Mon55%(49 flights)
  • Tue59%(46 flights)
  • Wed71%(44 flights)
  • Thu56%(48 flights)
  • Fri56%(48 flights)
  • Sat70%(43 flights)
  • Sun62%(47 flights)
On-time by departure window
  • 6–9 AM56%(39 flights)
  • 12–3 PM74%(23 flights)
  • 3–6 PM61%(263 flights)
On-time trend by month
76%
May

Jun 53% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%30
July 202540%30
August 202548%31
September 202540%30
October 202574%31
November 202579%28
December 202570%30
January 202671%31
February 202682%11
March 202672%25
April 202639%23
May 202676%25
Departures on time
74%
Diverted
0.6%
Flights flown
325
Months covered
12

Same route, other flights

Keep nerding

Based on 329 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.