Best Time to Fly MCO to STL: On-Time Stats by Hour & Airline
Orlando International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
2,497 flights were scheduled from Orlando (MCO) to St. Louis (STL) in the last 12 months, and 76.4% of those that flew arrived on time, 1.2 points below the US average of 77.6%.
Southwest Airlines was the most punctual of the 2 airlines on the route at 77.1%, while Frontier Airlines trailed at 72.6%.
September has been the best month (88% on time) and Sunday the weakest day of the week (70%).
0.7% of flights were cancelled, versus 1.8% nationally.
MCO 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 |
|---|---|---|---|---|
| Southwest Airlines | 77.1% | 62 min | 0.6% | 2,100 |
| Frontier Airlines | 72.6% | 93 min | 1.5% | 394 |
| Spirit Airlines | Limited data | 3 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MCO to STL
On-time arrival % by scheduled departure hour (local time), 4,876 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 91.2% | 5.6% | 36 |
| 6am–7am | 96.9% | 1.2% | 424 |
| 7am–8am | 93.9% | 1.2% | 332 |
| 8am–9am | 92.7% | 0.9% | 348 |
| 9am–10am | 91.6% | 0.7% | 287 |
| 10am–11am | 86.4% | 0.0% | 140 |
| 11am–12pm | 83.3% | 0.8% | 248 |
| 12pm–1pm | 74.3% | 1.4% | 209 |
| 1pm–2pm | 83.3% | 0.5% | 205 |
| 2pm–3pm | 77.2% | 1.3% | 236 |
| 3pm–4pm | 73.3% | 0.4% | 259 |
| 4pm–5pm | 63.3% | 0.7% | 151 |
| 5pm–6pm | 74.5% | 1.7% | 287 |
| 6pm–7pm | 68.4% | 1.2% | 248 |
| 7pm–8pm | 66.4% | 1.1% | 350 |
| 8pm–9pm | 62.7% | 0.9% | 343 |
| 9pm–10pm | 64.4% | 1.9% | 361 |
| 10pm–11pm | 62.5% | 1.2% | 412 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MCO 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) | 70.2% | -9.9 pts | 1.1% | 95 |
| Christmas & New Year (Dec 20 - Jan 3) | 70.6% | -9.5 pts | 0.5% | 216 |
| Summer peak (Jun 15 - Aug 15) | 69.2% | -10.9 pts | 1.0% | 836 |
| All other days | 80.1% | — | 1.2% | 3,729 |
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).