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Flight Reliability

UA 5104 · United Airlines

Denver → SUX (DEN–SUX)80% of its flights flew this route. The rest (SUX–DEN, LAR–DEN) are included in these numbers.

77
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
7 min
Average arrival delay
2.0%
Cancelled
9 min early
Median arrival delay

Based on 404 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

UA 5104 departing between 6–9 AM arrived on time 92% of the time, versus 50% between 12–3 PM.

Mondays have been rough.

UA 5104 arrived on time 88% of the time on Wednesdays and just 64% on Mondays. That gap is worth planning around.

A bit behind the DEN–SUX route.

UA 5104 arrived on time 78% of the time, versus 82% across the DEN–SUX route.

Trending in the right direction.

UA 5104 arrived on time 92% of the time over the last three months in the data, compared with 82% in the three months before that.

The breakdown

On-time by weekday
  • Mon64%(59 flights)
  • Tue81%(53 flights)
  • Wed88%(57 flights)
  • Thu85%(58 flights)
  • Fri74%(57 flights)
  • Sat78%(51 flights)
  • Sun78%(60 flights)
On-time by departure window
  • 6–9 AM92%(142 flights)
  • 9 AM–12 PM82%(38 flights)
  • 12–3 PM50%(26 flights)
  • 3–6 PM74%(152 flights)
  • 6–9 PM57%(37 flights)
On-time trend by month
93%
May

Jun 47% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%30
July 202561%31
August 202553%30
September 202574%34
October 202590%49
November 202589%35
December 202564%39
January 202690%31
February 202693%27
March 202693%29
April 202690%30
May 202693%30
Departures on time
80%
Diverted
0.2%
Flights flown
395
Months covered
12

Same route, other flights

Keep nerding

Based on 404 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.