About 1 in 5 UA 5911 flights from Helena arrived 15+ minutes late, diverted or cancelled over the past year (22%); 0.5% were cancelled. The typical flight landed 10 minutes early.
UA 5911: HLN → DEN
Scheduled to leave Helena at 2:30 p.m. local time, operated by SkyWest as OO 5911. Over the past year it arrived on time 78% of the time (363 flights), in line with other UA flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Helena to Denver (85% of days). United Airlines's last HLN–DEN flight was cancelled 0.5% of the time, against 0.2% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 6:15 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 75% |
| Tuesday | 52 | 83% |
| Wednesday | 52 | 75% |
| Thursday | 51 | 80% |
| Friday | 52 | 75% |
| Saturday | 51 | 73% |
| Sunday | 52 | 87% |
Why it was late
All flights HLN → DEN · Connecting off UA 5911? Check the risk
Questions
How often is UA 5911 from HLN to DEN late?
United Airlines 5911 from Helena, MT to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 22% of 363 scheduled flights between September 2025 and August 2026. 0.5% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.