Best Time to Fly LAX to STL: On-Time Stats by Hour & Airline
Los Angeles International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.2% of Los Angeles (LAX) to St. Louis (STL) flights arrived on time (1,027 scheduled flights). That is 1.4 points below the national average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 78.0%, while Southwest Airlines trailed at 75.3%.
May has been the best month (84% on time) and Monday the weakest day of the week (76%).
0.6% of flights were cancelled, versus 1.8% nationally.
LAX to STL 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 | 78.0% | 62 min | 0.8% | 354 |
| Southwest Airlines | 75.3% | 48 min | 0.5% | 673 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAX to STL
On-time arrival % by scheduled departure hour (local time), 2,036 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.0% | 0.5% | 382 |
| 6am–7am | 94.0% | 0.8% | 117 |
| 7am–8am | 87.7% | 0.0% | 73 |
| 8am–9am | 83.0% | 0.0% | 47 |
| 9am–10am | Limited data | 23 | |
| 10am–11am | Limited data | 19 | |
| 11am–12pm | 77.9% | 0.0% | 77 |
| 12pm–1pm | 62.7% | 0.0% | 75 |
| 1pm–2pm | 60.6% | 0.0% | 132 |
| 2pm–3pm | 72.7% | 0.0% | 33 |
| 3pm–4pm | Limited data | 21 | |
| 4pm–5pm | 74.4% | 1.1% | 87 |
| 5pm–6pm | 78.8% | 0.7% | 438 |
| 6pm–7pm | 76.8% | 0.8% | 384 |
| 7pm–8pm | 66.9% | 1.6% | 126 |
| 8pm–9pm | 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 STL
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) | 65.2% | -16.6 pts | 0.0% | 46 |
| Christmas & New Year (Dec 20 - Jan 3) | 81.0% | -0.8 pts | 0.0% | 95 |
| Summer peak (Jun 15 - Aug 15) | 75.2% | -6.6 pts | 0.5% | 373 |
| All other days | 81.8% | — | 0.7% | 1,522 |
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).