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

Bismarck/Mandan, ND (BIS) to Denver, CO (DEN) flight delay odds

77.7% of 1,502 official scheduled BIS-to-DEN flights arrived on time; 15.8% arrived at least 30 minutes late and 0.7% 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 SIGNALGenerally reliable
77.7%arrived on time
15.8%30+ min late
0.7%cancelled
1,502scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.5%all scheduled flights
120+ minutes late5.5%all scheduled flights
Diverted0.9%did not reach as scheduled
Average arrival+11.7 mincompleted flights

Which departure time was most reliable for BIS to DEN?

Among qualifying BIS-to-DEN departure window results, Early morning had the highest on-time rate: 85.3% of 456 flights. Evening was lowest at 59.5% across 331 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning45685.3%10.3%0.7%
Late morning35078.3%14.6%0.3%
Afternoon36384.0%11.0%0.8%
Evening33159.5%29.9%0.9%

Which weekday was most reliable for BIS to DEN?

Among qualifying BIS-to-DEN weekday results, Wednesday had the highest on-time rate: 81.3% of 219 flights. Monday was lowest at 72.3% across 220 flights.

DayFlightsOn time30+ minCancelled
Monday22072.3%22.3%0.5%
Tuesday22578.7%11.6%1.8%
Wednesday21981.3%12.3%0.5%
Thursday21777.4%16.6%0.0%
Friday21979.9%15.1%0.9%
Saturday18478.3%16.3%0.5%
Sunday21876.1%16.5%0.5%

Which airline was most reliable for BIS to DEN?

Only SkyWest Airlines met the BIS-to-DEN airline threshold: 77.7% of 1,502 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,50277.7%15.8%0.7%

Which month was most reliable for BIS to DEN?

Among qualifying BIS-to-DEN month results, October 2025 had the highest on-time rate: 86.7% of 120 flights. December 2025 was lowest at 66.4% across 122 flights.

MonthFlightsOn time30+ minCancelled
July 202515470.1%22.7%0.6%
August 202515271.7%21.1%0.0%
September 202513784.7%10.9%0.0%
October 202512086.7%10.8%0.0%
November 202511686.2%6.0%2.6%
December 202512266.4%27.9%0.0%
January 202611973.9%19.3%0.8%
February 202610683.0%11.3%1.9%
March 202612075.8%13.3%2.5%
April 202611970.6%21.8%0.0%
May 202612184.3%8.3%0.0%
June 202611682.8%12.1%0.0%

What drove BIS to DEN delay minutes?

Airline was the largest recorded BIS-to-DEN delay category, accounting for 55.2% of 35,501 BTS-attributed delay minutes during July 2025–June 2026.

Airline55.2%
Late aircraft21.1%
National airspace18.7%
Weather4.5%
Security0.5%
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.