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

Great Falls, MT (GTF) to Denver, CO (DEN) flight delay odds

84.5% of 729 official scheduled GTF-to-DEN flights arrived on time; 10.2% arrived at least 30 minutes late and 1.0% 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
84.5%arrived on time
10.2%30+ min late
1.0%cancelled
729scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.4%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival-1.9 mincompleted flights

Which departure time was most reliable for GTF to DEN?

Among qualifying GTF-to-DEN departure window results, Early morning had the highest on-time rate: 91.8% of 365 flights. Afternoon was lowest at 77.2% across 364 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36591.8%4.7%1.1%
Afternoon36477.2%15.7%0.8%

Which weekday was most reliable for GTF to DEN?

Among qualifying GTF-to-DEN weekday results, Sunday had the highest on-time rate: 89.4% of 104 flights. Friday was lowest at 78.8% across 104 flights.

DayFlightsOn time30+ minCancelled
Monday10487.5%11.5%0.0%
Tuesday10685.8%9.4%0.9%
Wednesday10484.6%10.6%1.9%
Thursday10382.5%9.7%1.0%
Friday10478.8%13.5%0.0%
Saturday10482.7%10.6%1.9%
Sunday10489.4%5.8%1.0%

Which airline was most reliable for GTF to DEN?

Among qualifying GTF-to-DEN airline results, SkyWest Airlines had the highest on-time rate: 90.5% of 201 flights. United Airlines was lowest at 82.2% across 528 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines52882.2%11.7%0.9%
SkyWest Airlines20190.5%6.0%1.0%

Which month was most reliable for GTF to DEN?

Among qualifying GTF-to-DEN month results, April 2026 had the highest on-time rate: 91.7% of 60 flights. August 2025 was lowest at 71.0% across 62 flights.

MonthFlightsOn time30+ minCancelled
July 20256274.2%16.1%0.0%
August 20256271.0%25.8%1.6%
September 20256085.0%11.7%0.0%
October 20256283.9%6.5%1.6%
November 20255991.5%5.1%0.0%
December 20256288.7%11.3%0.0%
January 20266290.3%3.2%1.6%
February 20265691.1%5.4%1.8%
March 20266290.3%3.2%1.6%
April 20266091.7%3.3%0.0%
May 20266283.9%9.7%3.2%
June 20266073.3%20.0%0.0%

What drove GTF to DEN delay minutes?

National airspace was the largest recorded GTF-to-DEN delay category, accounting for 30.4% of 9,527 BTS-attributed delay minutes during July 2025–June 2026.

Airline22.9%
Late aircraft21.5%
National airspace30.4%
Weather25.2%
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.