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Flight Reliability

UA 1125 · United Airlines

Denver → Boise (DEN–BOI)82% of its flights flew this route. The rest (CMH–LAX, GJT–DEN) are included in these numbers.

93
Nerd Approved
WanderNerd Reliability Score
86%
Arrive within 15 minutes
2 min
Average arrival delay
0%
Cancelled
5 min early
Median arrival delay

Based on 366 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 1125 departing between 9 PM–12 AM arrived on time 100% of the time, versus 85% between 9 AM–12 PM.

Tuesdays have been rough.

UA 1125 arrived on time 94% of the time on Fridays and just 79% on Tuesdays. That gap is worth planning around.

Better than the DEN–BOI route average.

UA 1125 arrived on time 86% of the time, versus 77% across the DEN–BOI route.

Better than the United Airlines network average.

UA 1125 arrived on time 86% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon85%(52 flights)
  • Tue79%(52 flights)
  • Wed89%(52 flights)
  • Thu83%(53 flights)
  • Fri94%(52 flights)
  • Sat87%(52 flights)
  • Sun89%(52 flights)
On-time by departure window
  • 6–9 AM90%(50 flights)
  • 9 AM–12 PM85%(301 flights)
  • 3–6 PM—(3 flights)
  • 9 PM–12 AM100%(11 flights)
On-time trend by month
94%
May

Jun 73% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202594%31
August 202577%31
September 202587%30
October 202587%31
November 202590%30
December 202577%31
January 202687%31
February 202696%27
March 202684%31
April 202690%31
May 202694%31
Departures on time
84%
Diverted
0.3%
Flights flown
365
Months covered
12

Same route, other flights

Keep nerding

Based on 366 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.