Best Time to Fly SLC to SAN: On-Time Stats by Hour & Airline
Salt Lake City International → San Diego International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.4% of Salt Lake City (SLC) to San Diego (SAN) flights arrived on time (3,008 scheduled flights). That is 4.7 points above the national average of 77.6%.
SkyWest Airlines was the most punctual of the 4 airlines on the route at 84.8%, while Southwest Airlines trailed at 73.3%.
March has been the best month (87% on time) and Friday the weakest day of the week (76%).
0.8% of flights were cancelled, versus 1.8% nationally.
SLC to SAN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 84.8% | 59 min | 0.9% | 746 |
| Frontier Airlines | 83.9% | 51 min | 2.5% | 121 |
| Delta Air Lines | 83.4% | 55 min | 0.8% | 1,732 |
| Southwest Airlines | 73.3% | 44 min | 0.2% | 408 |
| Alaska Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to SAN
On-time arrival % by scheduled departure hour (local time), 5,601 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 14 | |
| 7am–8am | 91.7% | 0.4% | 718 |
| 8am–9am | 82.2% | 0.0% | 366 |
| 9am–10am | 75.3% | 0.0% | 93 |
| 10am–11am | 83.6% | 1.2% | 339 |
| 11am–12pm | 81.5% | 0.7% | 1,086 |
| 12pm–1pm | 83.0% | 0.0% | 241 |
| 1pm–2pm | 69.4% | 2.7% | 37 |
| 2pm–3pm | 73.6% | 0.0% | 197 |
| 3pm–4pm | 78.0% | 0.2% | 858 |
| 4pm–5pm | Limited data | 8 | |
| 5pm–6pm | 77.2% | 0.0% | 590 |
| 6pm–7pm | 73.4% | 1.5% | 206 |
| 7pm–8pm | 74.7% | 5.3% | 76 |
| 8pm–9pm | 60.0% | 0.0% | 40 |
| 9pm–10pm | 87.8% | 0.0% | 139 |
| 10pm–11pm | 86.0% | 0.9% | 565 |
| 11pm–12am | Limited data | 28 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC to SAN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 80.6% | -3.5 pts | 0.0% | 108 |
| Christmas & New Year (Dec 20 - Jan 3) | 62.4% | -21.7 pts | 1.1% | 267 |
| Summer peak (Jun 15 - Aug 15) | 76.4% | -7.7 pts | 0.6% | 977 |
| All other days | 84.1% | — | 0.5% | 4,249 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).