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Flight Reliability

UA 4665 · United Airlines

Denver → BIS (DEN–BIS)95% of its flights flew this route. The rest (BNA–ORD, IAH–OMA) are included in these numbers.

61
A Little Dicey
WanderNerd Reliability Score
67%
Arrive within 15 minutes
23 min
Average arrival delay
1.4%
Cancelled
1 min
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 4665 departing between 9 AM–12 PM arrived on time 75% of the time, versus 64% between 3–6 PM.

Friday is doing you no favors.

UA 4665 arrived on time 85% of the time on Wednesdays and just 60% on Fridays. That gap is worth planning around.

Lagging the DEN–BIS route.

UA 4665 arrived on time 67% of the time, versus 76% across the DEN–BIS route.

Lagging the United Airlines network.

UA 4665 arrived on time 67% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon63%(51 flights)
  • Tue64%(50 flights)
  • Wed85%(52 flights)
  • Thu63%(51 flights)
  • Fri60%(50 flights)
  • Sat67%(52 flights)
  • Sun64%(53 flights)
On-time by departure window
  • 9 AM–12 PM75%(16 flights)
  • 3–6 PM64%(246 flights)
  • 6–9 PM72%(97 flights)
On-time trend by month
68%
May

Jun 57% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%28
July 202547%30
August 202536%31
September 202557%30
October 202577%31
November 202597%30
December 202570%30
January 202665%31
February 202671%28
March 202693%29
April 202663%30
May 202668%31
Departures on time
68%
Diverted
0.3%
Flights flown
359
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.