Best Time to Fly SLC to LAX: On-Time Stats by Hour & Airline
Salt Lake City International → Los Angeles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.5% of Salt Lake City (SLC) to Los Angeles (LAX) flights arrived on time (4,191 scheduled flights). That is 8.8 points above the national average of 77.6%.
United Airlines was the most punctual of the 5 airlines on the route at 91.9%, while Southwest Airlines trailed at 82.3%.
November has been the best month (90% on time) and Sunday the weakest day of the week (83%).
0.5% of flights were cancelled, versus 1.8% nationally.
SLC to LAX 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 |
|---|---|---|---|---|
| United Airlines | 91.9% | 34 min | 0.0% | 148 |
| SkyWest Airlines | 90.3% | 79 min | 0.0% | 721 |
| Frontier Airlines | 89.0% | 74 min | 1.3% | 470 |
| Delta Air Lines | 85.1% | 51 min | 0.5% | 2,455 |
| Southwest Airlines | 82.3% | 44 min | 0.3% | 374 |
| Spirit Airlines | Limited data | 23 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to LAX
On-time arrival % by scheduled departure hour (local time), 8,205 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 90.2% | 2.4% | 42 |
| 7am–8am | 91.5% | 0.3% | 919 |
| 8am–9am | 91.7% | 0.0% | 587 |
| 9am–10am | 92.7% | 0.0% | 822 |
| 10am–11am | 93.3% | 0.5% | 210 |
| 11am–12pm | 88.5% | 0.3% | 865 |
| 12pm–1pm | 87.1% | 0.0% | 404 |
| 1pm–2pm | 74.9% | 0.0% | 191 |
| 2pm–3pm | 81.4% | 0.0% | 156 |
| 3pm–4pm | 80.8% | 0.2% | 832 |
| 4pm–5pm | 89.3% | 0.4% | 470 |
| 5pm–6pm | 84.0% | 0.6% | 968 |
| 6pm–7pm | 78.4% | 0.5% | 191 |
| 7pm–8pm | 89.4% | 1.2% | 86 |
| 8pm–9pm | 77.4% | 0.0% | 513 |
| 9pm–10pm | 84.2% | 1.0% | 403 |
| 10pm–11pm | 84.0% | 0.2% | 546 |
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 LAX
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) | 89.0% | +1.3 pts | 0.7% | 138 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.8% | -9.9 pts | 0.6% | 363 |
| Summer peak (Jun 15 - Aug 15) | 81.9% | -5.9 pts | 0.6% | 1,266 |
| All other days | 87.7% | — | 0.2% | 6,438 |
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).