Route on-time record
HLN to DEN: most on-time flights and the best time to fly
Helena (Helena Regional Airport) to Denver (Denver International Airport). 874 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was SkyWest 4660 at 6:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
HLN → DEN
Helena to Denver: 874 nonstop flights a year
On time (12 months)
77%
Cancelled
0.9%
avg delay 27 min
Best time to leave
Before 9 AM
89% on time vs 52% 3 to 6 PM
Most reliable airline
SkyWest
77% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · SkyWest 4660 · sold as United Express, Delta Connection, American Eagle or Alaska
6:15 AM → 8:24 AM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.7%
- Avg arrival delay
- 8 min
- Arrived on time 93% of the time (145 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 52%).
Moderate track record · 145 flights
Find 6:15 AM flight fares Opens this date on Aviasales#2 · SkyWest 5911 · sold as United Express, Delta Connection, American Eagle or Alaska
2:25 PM → 4:34 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.5%
- Avg arrival delay
- 32 min
- Arrived on time 74% of the time (353 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 353 flights
Find 2:25 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)77%
874 flights · 77% on time as flown · 0.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
365 flights · avg delay 16 min
- Noon to 3 PM74%
364 flights · avg delay 32 min
- 3 to 6 PM52%
145 flights · avg delay 42 min
Best day: Tuesday (81%). Worst: Friday (74%).
Smarter routing
Nearby airports that run more on time
BTM → DEN 82% chance on time
Bert Mooney Airport to Denver International Airport · 365 flights a year · 51 mi from your airports · yours: 76%
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)37%
- Air traffic control and airport volume30%
- Late-arriving aircraft20%
- Severe weather13%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
HLN to DEN questions
- What time of day is best to fly HLN to DEN?
- Before 9 AM: 89% of flights arrived on time, against 52% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from HLN to DEN?
- SkyWest, with a season-adjusted 77% chance of operating and arriving on time over 874 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on HLN to DEN?
- July (64% on time); the best was March (89%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from HLN
Live status: FAA delays and ground stops