Salt Lake City (SLC) to San Diego (SAN): On-Time Performance
Data through May 2026
Salt Lake City (SLC) to San Diego (SAN) effectively runs on two schedules. In March 2026, 91% of arrivals were on time; in September 2024 that fell to 74% — a 17-point seasonal swing. Across the full period the route averages 82% on-time against a national 78%.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 8.0
- last 12 months
- Duration
- 1h 59m
- scheduled
- Distance
- 626 mi
Best airline from SLC to SAN
5 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 84% | 10 min | 0.9% | 1,042 |
| Frontier Airlines | 84% | 9 min | 2.1% | 142 |
| Delta Air Lines | 82% | 12 min | 0.6% | 3,468 |
| Spirit Airlines | 81% | 19 min | 1.3% | 75 |
| Southwest Airlines | 75% | 16 min | 0.2% | 811 |
Monthly on-time trend
Best time to fly from SLC to SAN
Aim for departures around 7 a.m. (92% on-time); avoid 8 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 85% | 8 min |
| Tuesdaybest | 87% | 9 min |
| Wednesday | 85% | 9 min |
| Thursday | 79% | 15 min |
| Friday | 75% | 18 min |
| Saturday | 83% | 11 min |
| Sunday | 78% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft31%
- Airline operations38%
- National airspace system27%
- Weather6%
Frequently asked questions
- How often are flights from SLC to SAN delayed?
- 18% of SLC–SAN 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 12 minutes.
- Which airline is most reliable from SLC to SAN?
- SkyWest Airlines has the best on-time record on this route at 84%, based on 1,042 flights. 5 airlines flew SLC–SAN frequently enough to compare in this period.
- What is the best time of day to fly from SLC to SAN?
- Departures around 7 a.m. have the best record (92% on-time), while departures around 8 p.m. have the worst (59%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SLC to SAN?
- The scheduled SLC–SAN flight time averages 1h 59m over 626 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are SLC to SAN 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 SAN?
- September 2024 was the roughest month in this dataset, with only 74% of arrivals on time. The best was March 2026 at 91%. If your dates are flexible, that 17-point gap is worth planning around.
Explore related pages
More routes from SLC
Based on 5,539 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.