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Flight Reliability

UA 5923 · United Airlines

Denver → Boise (DEN–BOI)99% of its flights flew this route. The rest (IAH–MCI) are included in these numbers.

71
Usually Fine
WanderNerd Reliability Score
69%
Arrive within 15 minutes
14 min
Average arrival delay
0.3%
Cancelled
2 min early
Median arrival delay

Based on 300 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 5923 departing between 9 PM–12 AM arrived on time 95% of the time, versus 67% between 6–9 PM.

Saturdays have been rough.

UA 5923 arrived on time 84% of the time on Wednesdays and just 61% on Saturdays. That gap is worth planning around.

Lagging the DEN–BOI route.

UA 5923 arrived on time 69% of the time, versus 77% across the DEN–BOI route.

Lagging the United Airlines network.

UA 5923 arrived on time 69% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon69%(45 flights)
  • Tue74%(34 flights)
  • Wed84%(43 flights)
  • Thu64%(42 flights)
  • Fri64%(44 flights)
  • Sat61%(43 flights)
  • Sun72%(46 flights)
On-time by departure window
  • 12–3 PM—(3 flights)
  • 6–9 PM67%(273 flights)
  • 9 PM–12 AM95%(21 flights)
On-time trend by month
77%
May

Jun 53% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%30
July 202550%28
August 202542%31
September 202568%25
October 202565%26
November 202586%28
December 202560%15
February 202694%17
March 202684%31
April 202683%30
May 202677%31
Departures on time
67%
Diverted
0.7%
Flights flown
297
Months covered
12

Same route, other flights

Keep nerding

Based on 300 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.