Salt Lake City (SLC) to San Francisco (SFO): On-Time Performance
Data through May 2026
Salt Lake City (SLC) to San Francisco (SFO) effectively runs on two schedules. In January 2025, 88% of arrivals were on time; in May 2026 that fell to 46% — a 41-point seasonal swing. Across the full period the route averages 75% on-time against a national 78%.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 9.6
- last 12 months
- Duration
- 2h 13m
- scheduled
- Distance
- 599 mi
Best airline from SLC to SFO
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 82% | 15 min | 0.2% | 854 |
| SkyWest Airlines | 76% | 19 min | 0.9% | 2,348 |
| Delta Air Lines | 73% | 16 min | 0.6% | 3,413 |
| Frontier Airlines | 68% | 27 min | 1.2% | 416 |
Monthly on-time trend
Best time to fly from SLC to SFO
Aim for departures around 6 a.m. (92% on-time); avoid 8 p.m. departures (62%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 21 min |
| Tuesdaybest | 81% | 11 min |
| Wednesday | 75% | 19 min |
| Thursday | 73% | 20 min |
| Friday | 74% | 17 min |
| Saturday | 80% | 15 min |
| Sunday | 71% | 21 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft21%
- Airline operations32%
- National airspace system46%
- Weather1%
Frequently asked questions
- How often are flights from SLC to SFO delayed?
- 25% of SLC–SFO flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from SLC to SFO?
- United Airlines has the best on-time record on this route at 82%, based on 854 flights. 4 airlines flew SLC–SFO frequently enough to compare in this period.
- What is the best time of day to fly from SLC to SFO?
- Departures around 6 a.m. have the best record (92% on-time), while departures around 8 p.m. have the worst (62%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SLC to SFO?
- The scheduled SLC–SFO flight time averages 2h 13m over 599 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are SLC to SFO flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from SLC to SFO?
- May 2026 was the roughest month in this dataset, with only 46% of arrivals on time. The best was January 2025 at 88%. If your dates are flexible, that 41-point gap is worth planning around.
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Based on 7,031 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.