About 1 in 46 DL 3901 flights from Helena arrived 15+ minutes late, diverted or cancelled over the past year (2%); 0.0% were cancelled. The typical flight landed 15 minutes early.
DL 3901: HLN → SLC
Scheduled to leave Helena at 5:30 a.m. local time, operated by SkyWest as OO 3901. Over the past year it arrived on time 98% of the time (365 flights), in line with other DL flights on the route at that hour (98%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 96% |
| Tuesday | 52 | 100% |
| Wednesday | 52 | 100% |
| Thursday | 52 | 98% |
| Friday | 52 | 96% |
| Saturday | 52 | 98% |
| Sunday | 52 | 96% |
Why it was late
All flights HLN → SLC · Connecting off DL 3901? Check the risk
Questions
How often is DL 3901 from HLN to SLC late?
Delta Air Lines 3901 from Helena, MT to Salt Lake City, UT arrived 15 or more minutes late, was diverted or was cancelled on 2% of 365 scheduled flights between September 2025 and August 2026. 0.0% 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 Delta Air Lines for today's flight. Method.