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

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

77.6% of 844 official scheduled HLN-to-DEN flights arrived on time; 16.2% 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
77.6%arrived on time
16.2%30+ min late
0.7%cancelled
844scheduled 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 late6.4%all scheduled flights
Diverted0.9%did not reach as scheduled
Average arrival+10.1 mincompleted flights

Which departure time was most reliable for HLN to DEN?

Among qualifying HLN-to-DEN departure window results, Early morning had the highest on-time rate: 89.0% of 365 flights. Evening was lowest at 53.9% across 115 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36589.0%7.1%0.5%
Afternoon36473.6%19.2%0.3%
Evening11553.9%35.7%2.6%

Which weekday was most reliable for HLN to DEN?

Among qualifying HLN-to-DEN weekday results, Sunday had the highest on-time rate: 85.0% of 120 flights. Saturday was lowest at 73.3% across 120 flights.

DayFlightsOn time30+ minCancelled
Monday12076.7%18.3%0.0%
Tuesday12382.1%12.2%1.6%
Wednesday12176.9%15.7%0.8%
Thursday12075.8%21.7%0.0%
Friday12073.3%19.2%0.8%
Saturday12073.3%16.7%1.7%
Sunday12085.0%10.0%0.0%

Which airline was most reliable for HLN to DEN?

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

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines84477.6%16.2%0.7%

Which month was most reliable for HLN to DEN?

Among qualifying HLN-to-DEN month results, May 2026 had the highest on-time rate: 93.5% of 62 flights. July 2025 was lowest at 48.4% across 91 flights.

MonthFlightsOn time30+ minCancelled
July 20259148.4%36.3%2.2%
August 20259360.2%31.2%2.2%
September 20259074.4%18.9%0.0%
October 20258782.8%11.5%0.0%
November 20255984.7%8.5%1.7%
December 20256277.4%21.0%0.0%
January 20266291.9%3.2%0.0%
February 20265689.3%8.9%0.0%
March 20266287.1%9.7%1.6%
April 20266093.3%6.7%0.0%
May 20266293.5%4.8%0.0%
June 20266071.7%16.7%0.0%

What drove HLN to DEN delay minutes?

Airline was the largest recorded HLN-to-DEN delay category, accounting for 37.1% of 18,409 BTS-attributed delay minutes during July 2025–June 2026.

Airline37.1%
Late aircraft22.3%
National airspace27.2%
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.