Flight OddsUnited Airlines · San Francisco, CA to Salt Lake City, UT · 49 flights observed, 2025-07-01 to 2025-08-18 · 599 mi
UA1939 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 UA1939 on time?
Across 49 flights on SFO → SLC from 2025-07-01 to 2025-08-18, UA1939 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +44 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 | 33 | 67% |
| 16-30 min | 8 | 16% |
| 31-60 min | 3 | 6% |
| 61-120 min | 5 | 10% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 65% | +10 min |
| 2025-08 | 18 | 72% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 29% |
| Tue | 7 | 71% |
| Wed | 7 | 71% |
| Thu | 7 | 57% |
| Fri | 7 | 57% |
| Sat | 7 | 100% |
| Sun | 7 | 86% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…