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

Denver, CO (DEN) to Helena, MT (HLN) flight delay odds

77.6% of 844 official scheduled DEN-to-HLN flights arrived on time; 14.3% arrived at least 30 minutes late and 1.1% 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
77.6%arrived on time
14.3%30+ min late
1.1%cancelled
844scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.8%all scheduled flights
120+ minutes late4.1%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+8.6 mincompleted flights

Which departure time was most reliable for DEN to HLN?

Among qualifying DEN-to-HLN departure window results, Late morning had the highest on-time rate: 80.3% of 335 flights. Evening was lowest at 74.2% across 364 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning33580.3%11.9%0.3%
Afternoon14580.0%11.0%0.7%
Evening36474.2%17.9%1.9%

Which weekday was most reliable for DEN to HLN?

Among qualifying DEN-to-HLN weekday results, Tuesday had the highest on-time rate: 81.3% of 123 flights. Friday was lowest at 70.8% across 120 flights.

DayFlightsOn time30+ minCancelled
Monday12076.7%15.8%0.0%
Tuesday12381.3%11.4%1.6%
Wednesday12177.7%17.4%0.8%
Thursday12076.7%12.5%2.5%
Friday12070.8%17.5%1.7%
Saturday12079.2%14.2%0.8%
Sunday12080.8%11.7%0.0%

Which airline was most reliable for DEN to HLN?

Only SkyWest Airlines met the DEN-to-HLN airline threshold: 77.6% of 844 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines84477.6%14.3%1.1%

Which month was most reliable for DEN to HLN?

Among qualifying DEN-to-HLN month results, April 2026 had the highest on-time rate: 95.0% of 60 flights. August 2025 was lowest at 59.1% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 20259159.3%30.8%4.4%
August 20259359.1%22.6%2.2%
September 20259082.2%8.9%0.0%
October 20258789.7%5.7%0.0%
November 20255986.4%8.5%1.7%
December 20256277.4%17.7%0.0%
January 20266283.9%9.7%0.0%
February 20265685.7%12.5%1.8%
March 20266272.6%16.1%1.6%
April 20266095.0%1.7%0.0%
May 20266288.7%6.5%0.0%
June 20266063.3%25.0%0.0%

What drove DEN to HLN delay minutes?

Airline was the largest recorded DEN-to-HLN delay category, accounting for 31.6% of 12,853 BTS-attributed delay minutes during July 2025–June 2026.

Airline31.6%
Late aircraft27.9%
National airspace27.1%
Weather13.4%
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.