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Route Reliability

BIL → Denver

BIL–DEN · 455 miles · BIL Airport to Denver International Airport

83
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
5 min
Average arrival delay
0.9%
Cancelled
1,786
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 81% of the time across 1,786 flights. No comparison to make.

What the data says

Morning-you made the right choice.

BIL–DEN flights departing between 3–6 AM arrived on time 95% of the time, versus 66% between 3–6 PM.

Saturday has been the better bet.

A small edge: 84% on time on Saturdays against 77% on Fridays.

Ticking up lately.

BIL–DEN flights arrived on time 89% of the time over the last three months in the data, compared with 84% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon81%(256 flights)
  • Tue81%(246 flights)
  • Wed83%(252 flights)
  • Thu78%(249 flights)
  • Fri77%(250 flights)
  • Sat84%(246 flights)
  • Sun82%(260 flights)
On-time by departure window
  • 3–6 AM95%(219 flights)
  • 6–9 AM91%(365 flights)
  • 9 AM–12 PM89%(359 flights)
  • 12–3 PM74%(358 flights)
  • 3–6 PM66%(447 flights)
  • 6–9 PM82%(11 flights)
On-time trend by month
89%
May

Jun 67% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%175
July 202571%175
August 202568%179
September 202581%166
October 202587%155
November 202588%142
December 202584%122
January 202687%122
February 202682%110
March 202684%123
April 202694%127
May 202689%163

Keep nerding

Based on 1,786 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.