Best Time to Fly LGA to STL: On-Time Stats by Hour & Airline
LaGuardia → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.7% of New York (LGA) to St. Louis (STL) flights arrived on time (2,623 scheduled flights). That is 0.9 points below the national average of 77.6%.
Among 2 airlines, Republic Airways led with 78.2% on time and Southwest Airlines was last with 75.2%.
Over 24 months, Wednesday was the most reliable day (82% on time) and July the worst month (70%).
The cancellation rate was 4.2% (US average 1.8%).
LGA 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 |
|---|---|---|---|---|
| Republic Airways | 78.2% | 73 min | 5.1% | 1,201 |
| Southwest Airlines | 75.2% | 66 min | 3.4% | 1,394 |
| SkyWest Airlines | Limited data | 28 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LGA to STL
On-time arrival % by scheduled departure hour (local time), 5,693 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 93.9% | 1.9% | 569 |
| 7am–8am | 93.9% | 2.0% | 353 |
| 8am–9am | 86.5% | 2.1% | 189 |
| 9am–10am | 86.7% | 2.0% | 460 |
| 10am–11am | 86.3% | 2.2% | 711 |
| 11am–12pm | 83.0% | 2.2% | 90 |
| 12pm–1pm | 82.5% | 2.5% | 647 |
| 1pm–2pm | 86.0% | 0.5% | 223 |
| 2pm–3pm | 78.5% | 2.4% | 125 |
| 3pm–4pm | 62.7% | 3.1% | 489 |
| 4pm–5pm | 78.3% | 4.9% | 346 |
| 5pm–6pm | 76.5% | 3.7% | 328 |
| 6pm–7pm | 66.2% | 6.3% | 949 |
| 7pm–8pm | 63.2% | 12.2% | 156 |
| 8pm–9pm | Limited data | 30 | |
| 9pm–10pm | 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 LGA 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) | 81.7% | +0.0 pts | 0.0% | 115 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.3% | -4.5 pts | 2.0% | 203 |
| Summer peak (Jun 15 - Aug 15) | 70.6% | -11.1 pts | 8.0% | 917 |
| All other days | 81.7% | — | 2.6% | 4,458 |
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).