About 1 in 3 DL 1091 flights from Salt Lake City arrived 15+ minutes late, diverted or cancelled over the past year (35%); 0.3% were cancelled. The typical flight landed 3 minutes late.
DL 1091: SLC → SFO
Scheduled to leave Salt Lake City at 10:45 p.m. local time. Over the past year it arrived on time 65% of the time (330 flights), in line with other DL flights on the route at that hour (66%). Last seen in the data Aug 30, 2026.
Usually Delta Air Lines's last flight of the day from Salt Lake City to San Francisco (100% of days). Delta Air Lines's last SLC–SFO flight was cancelled 0.3% of the time, against 1.1% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:50 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 51 | 59% |
| Tuesday | 46 | 78% |
| Wednesday | 46 | 72% |
| Thursday | 49 | 67% |
| Friday | 50 | 62% |
| Saturday | 37 | 73% |
| Sunday | 51 | 49% |
Why it was late
All flights SLC → SFO · Connecting off DL 1091? Check the risk
Questions
How often is DL 1091 from SLC to SFO late?
Delta Air Lines 1091 from Salt Lake City, UT to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 35% of 330 scheduled flights between September 2025 and August 2026. 0.3% 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.