Flight OddsDelta Air Lines · San Francisco, CA to Salt Lake City, UT · 25 flights observed, 2026-05-07 to 2026-06-05 · 599 mi
DL1991 covers more than one route in the data window — the stats below are for SFO → SLC, the one it has flown most recently. The others are linked under “Other routes”.
How often is DL1991 on time?
Across 25 flights on SFO → SLC from 2026-05-07 to 2026-06-05, DL1991 arrived within 15 minutes of schedule 76% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +52 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 19 | 76% |
| 16-30 min | 1 | 4% |
| 31-60 min | 3 | 12% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 2 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 20 | 75% | +15 min |
| 2026-06 | 5 | 80% | 0 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 25% |
| Tue | 4 | 100% |
| Wed | 4 | 100% |
| Thu | 5 | 60% |
| Fri | 5 | 80% |
| Sat | No data | — |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…