BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BIL→DEN

Billings, MT (BIL) to Denver, CO (DEN) flight delay odds

81.1% of 1,782 official scheduled BIL-to-DEN flights arrived on time; 12.5% arrived at least 30 minutes late and 0.8% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
81.1%arrived on time
12.5%30+ min late
0.8%cancelled
1,782scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.1%all scheduled flights
120+ minutes late2.8%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+1.8 mincompleted flights

Which departure time was most reliable for BIL to DEN?

Among qualifying BIL-to-DEN departure window results, Early morning had the highest on-time rate: 92.6% of 584 flights. Evening was lowest at 67.2% across 320 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning58492.6%4.8%0.0%
Late morning36389.3%6.3%1.1%
Afternoon51571.1%20.0%0.0%
Evening32067.2%21.6%3.4%

Which weekday was most reliable for BIL to DEN?

Among qualifying BIL-to-DEN weekday results, Sunday had the highest on-time rate: 84.8% of 257 flights. Monday was lowest at 78.3% across 258 flights.

DayFlightsOn time30+ minCancelled
Monday25878.3%14.0%0.8%
Tuesday25783.3%12.8%1.2%
Wednesday25682.4%10.2%0.8%
Thursday25379.4%13.8%0.8%
Friday25678.5%14.5%1.2%
Saturday24581.2%13.5%0.8%
Sunday25784.8%8.9%0.4%

Which airline was most reliable for BIL to DEN?

Among qualifying BIL-to-DEN airline results, United Airlines had the highest on-time rate: 82.1% of 730 flights. SkyWest Airlines was lowest at 80.5% across 1,052 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,05280.5%13.5%1.4%
United Airlines73082.1%11.1%0.0%

Which month was most reliable for BIL to DEN?

Among qualifying BIL-to-DEN month results, April 2026 had the highest on-time rate: 93.7% of 127 flights. August 2025 was lowest at 67.4% across 181 flights.

MonthFlightsOn time30+ minCancelled
July 202518367.8%23.5%1.6%
August 202518167.4%24.3%0.6%
September 202516780.2%13.8%0.0%
October 202515586.5%6.5%0.0%
November 202514684.2%7.5%2.7%
December 202512579.2%12.8%2.4%
January 202612485.5%6.5%0.8%
February 202611181.1%12.6%0.9%
March 202612482.3%12.1%0.8%
April 202612793.7%4.7%0.0%
May 202616389.0%9.2%0.0%
June 202617684.1%10.2%0.6%

What drove BIL to DEN delay minutes?

Late aircraft was the largest recorded BIL-to-DEN delay category, accounting for 33.0% of 23,819 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.4%
Late aircraft33.0%
National airspace31.7%
Weather7.8%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.