Best Time to Fly FLL to STL: On-Time Stats by Hour & Airline
Fort Lauderdale-Hollywood International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.3% of Fort Lauderdale (FLL) to St. Louis (STL) flights arrived on time (828 scheduled flights). That is in line with the national average of 77.6%.
Among 2 airlines, Southwest Airlines led with 77.7% on time and Spirit Airlines was last with 73.7%.
Over 24 months, Tuesday was the most reliable day (90% on time) and June the worst month (74%).
The cancellation rate was 0.5% (US average 1.8%).
FLL 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 | 77.7% | 49 min | 0.4% | 766 |
| Spirit Airlines | 73.7% | 50 min | 1.7% | 58 |
| Frontier Airlines | Limited data | 4 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly FLL to STL
On-time arrival % by scheduled departure hour (local time), 1,717 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.1% | 0.6% | 163 |
| 6am–7am | 96.3% | 0.9% | 110 |
| 7am–8am | 95.2% | 0.6% | 314 |
| 8am–9am | 92.2% | 1.4% | 145 |
| 9am–10am | 79.4% | 0.0% | 34 |
| 10am–11am | 87.9% | 0.0% | 58 |
| 11am–12pm | 84.9% | 0.0% | 53 |
| 12pm–1pm | 86.4% | 0.0% | 66 |
| 1pm–2pm | 67.2% | 3.0% | 67 |
| 2pm–3pm | 66.7% | 1.9% | 104 |
| 3pm–4pm | 61.0% | 4.7% | 86 |
| 4pm–5pm | 70.6% | 0.0% | 68 |
| 5pm–6pm | 73.7% | 0.9% | 115 |
| 6pm–7pm | 62.5% | 0.0% | 112 |
| 7pm–8pm | 60.8% | 0.0% | 186 |
| 8pm–9pm | Limited data | 25 | |
| 9pm–10pm | Limited data | 10 | |
| 10pm–11pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on FLL 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) | 68.3% | -13.2 pts | 0.0% | 41 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.1% | -5.4 pts | 0.0% | 88 |
| Summer peak (Jun 15 - Aug 15) | 76.7% | -4.8 pts | 0.7% | 294 |
| All other days | 81.5% | — | 1.1% | 1,294 |
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).