Best Time to Fly LAX to SLC: On-Time Stats by Hour & Airline
Los Angeles International → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 87.5% of Los Angeles (LAX) to Salt Lake City (SLC) flights arrived on time (4,189 scheduled flights). That is 9.9 points above the national average of 77.6%.
Among 5 airlines, SkyWest Airlines led with 89.2% on time and Southwest Airlines was last with 80.4%.
Over 24 months, Tuesday was the most reliable day (92% on time) and July the worst month (85%).
The cancellation rate was 0.5% (US average 1.8%).
LAX to SLC 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 | 89.2% | 74 min | 0.0% | 721 |
| United Airlines | 88.6% | 65 min | 0.0% | 149 |
| Delta Air Lines | 88.6% | 80 min | 0.5% | 2,452 |
| Frontier Airlines | 84.9% | 77 min | 1.3% | 470 |
| Southwest Airlines | 80.4% | 44 min | 0.5% | 374 |
| Spirit Airlines | Limited data | 23 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAX to SLC
On-time arrival % by scheduled departure hour (local time), 8,200 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.0% | 0.2% | 537 |
| 6am–7am | 94.8% | 0.4% | 233 |
| 7am–8am | 92.2% | 0.5% | 880 |
| 8am–9am | 92.4% | 0.0% | 317 |
| 9am–10am | 93.3% | 0.3% | 1,033 |
| 10am–11am | 84.9% | 0.6% | 519 |
| 11am–12pm | 91.0% | 0.0% | 921 |
| 12pm–1pm | 89.9% | 0.0% | 160 |
| 1pm–2pm | 86.2% | 0.2% | 971 |
| 2pm–3pm | 81.9% | 0.0% | 215 |
| 3pm–4pm | 71.6% | 0.0% | 81 |
| 4pm–5pm | 88.0% | 0.0% | 241 |
| 5pm–6pm | 82.2% | 0.6% | 817 |
| 6pm–7pm | 87.9% | 0.3% | 340 |
| 7pm–8pm | 88.0% | 0.2% | 877 |
| 8pm–9pm | 71.4% | 0.0% | 56 |
| 9pm–10pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAX to SLC
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) | 93.4% | +3.7 pts | 0.7% | 138 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.7% | -6.1 pts | 0.6% | 363 |
| Summer peak (Jun 15 - Aug 15) | 85.2% | -4.5 pts | 0.6% | 1,265 |
| All other days | 89.7% | — | 0.2% | 6,434 |
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).