San Diego (SAN) to Salt Lake City (SLC): On-Time Performance
Data through July 2026
Your airline choice is the single biggest lever on SAN–SLC. Delta Air Lines arrives on time 87% of the time; Southwest Airlines trails at 75% — a 12-point spread on the exact same city pair. The route as a whole runs 83% on-time.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 8.2
- last 12 months
- Duration
- 2h 3m
- scheduled
- Distance
- 626 mi
Best airline from SAN to SLC
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 87% | 11 min | 0.7% | 3,614 |
| Frontier Airlines | 82% | 17 min | 0.7% | 142 |
| Spirit Airlines | 81% | 16 min | 1.6% | 64 |
| SkyWest Airlines | 78% | 14 min | 0.6% | 1,189 |
| Southwest Airlines | 75% | 14 min | 0.2% | 838 |
Monthly on-time trend
Best time to fly from SAN to SLC
Aim for departures around 6 a.m. (95% on-time); avoid 11 a.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 86% | 11 min |
| Tuesday | 87% | 8 min |
| Wednesdaybest | 88% | 9 min |
| Thursday | 79% | 17 min |
| Friday | 77% | 18 min |
| Saturday | 86% | 10 min |
| Sunday | 80% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft57%
- Airline operations25%
- National airspace system13%
- Weather4%
Frequently asked questions
- How often are flights from SAN to SLC delayed?
- 17% of SAN–SLC 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 SAN to SLC?
- Delta Air Lines has the best on-time record on this route at 87%, based on 3,614 flights. 5 airlines flew SAN–SLC frequently enough to compare in this period.
- What is the best time of day to fly from SAN to SLC?
- Departures around 6 a.m. have the best record (95% on-time), while departures around 11 a.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SAN to SLC?
- The scheduled SAN–SLC flight time averages 2h 3m over 626 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are SAN to SLC flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What day of the week is most reliable for SAN to SLC?
- Wednesday flights have the best record at 88% on-time. Day-of-week differences on this route are meaningful — Friday trails at 77%.
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Based on 5,847 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.