Salt Lake City (SLC) to San Diego (SAN): On-Time Performance
Data through July 2026
Salt Lake City (SLC) to San Diego (SAN) effectively runs on two schedules. In March 2026, 91% of arrivals were on time; in July 2026 that fell to 73% — a 18-point seasonal swing. Across the full period the route averages 81% on-time against a national 78%.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 8.2
- last 12 months
- Duration
- 1h 60m
- scheduled
- Distance
- 626 mi
Best airline from SLC to SAN
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 84% | 11 min | 0.8% | 1,185 |
| Frontier Airlines | 84% | 9 min | 2.1% | 142 |
| Delta Air Lines | 82% | 12 min | 0.7% | 3,613 |
| Spirit Airlines | 81% | 18 min | 1.6% | 64 |
| Southwest Airlines | 74% | 16 min | 0.2% | 838 |
Monthly on-time trend
Best time to fly from SLC to SAN
Aim for departures around 7 a.m. (91% on-time); avoid 8 p.m. departures (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 9 min |
| Tuesdaybest | 86% | 10 min |
| Wednesday | 85% | 9 min |
| Thursday | 78% | 15 min |
| Friday | 75% | 18 min |
| Saturday | 83% | 10 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 aircraft30%
- Airline operations37%
- National airspace system27%
- Weather6%
Frequently asked questions
- How often are flights from SLC to SAN delayed?
- 19% of SLC–SAN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. 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 1,185 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 (91% on-time), while departures around 8 p.m. have the worst (60%). 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 60m over 626 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are SLC to SAN flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SLC to SAN?
- July 2026 was the roughest month in this dataset, with only 73% of arrivals on time. The best was March 2026 at 91%. If your dates are flexible, that 18-point gap is worth planning around.
Explore related pages
More routes from SLC
Other ways to fly to San Diego (SAN)
Related guides
Based on 5,843 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.