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

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

Historically, 77.2% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 729 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
77.2%arrived on time
15.9%30+ min late
0.5%cancelled
729scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.9%all scheduled flights
120+ minutes late3.4%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+8.0 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Late morning36583.3%9.3%0.5%
Evening36471.2%22.5%0.5%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday10482.7%12.5%0.0%
Tuesday10679.2%17.0%0.9%
Wednesday10469.2%19.2%1.0%
Thursday10376.7%17.5%0.0%
Friday10474.0%19.2%0.0%
Saturday10476.0%13.5%1.9%
Sunday10482.7%12.5%0.0%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines52874.2%18.6%0.4%
SkyWest Airlines20185.1%9.0%1.0%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 20256258.1%30.6%0.0%
August 20256272.6%22.6%1.6%
September 20256081.7%10.0%0.0%
October 20256285.5%6.5%0.0%
November 20255994.9%3.4%0.0%
December 20256285.5%9.7%0.0%
January 20266285.5%8.1%1.6%
February 20265678.6%12.5%1.8%
March 20266274.2%19.4%1.6%
April 20266090.0%6.7%0.0%
May 20266267.7%24.2%0.0%
June 20266053.3%36.7%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline28.6%
Late aircraft51.8%
National airspace14.6%
Weather4.9%
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.