St. Louis (STL) to Fort Lauderdale (FLL): On-Time Performance
Data through May 2026
The calendar drives reliability on STL–FLL. November 2024 flights landed on schedule 90% of the time, but July 2024 dropped to 60% — a gap of 31 points. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 73%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 2.3
- last 12 months
- Duration
- 2h 40m
- scheduled
- Distance
- 1,057 mi
Best airline from STL to FLL
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 78% | 13 min | 0.8% | 1,462 |
| Spirit Airlines | 72% | 22 min | 2.7% | 256 |
Monthly on-time trend
Best time to fly from STL to FLL
Aim for departures around 5 a.m. (95% on-time); avoid 1 p.m. departures (61%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 15 min |
| Tuesday | 79% | 11 min |
| Wednesdaybest | 85% | 9 min |
| Thursday | 78% | 20 min |
| Friday | 74% | 15 min |
| Saturday | 76% | 14 min |
| Sunday | 73% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft48%
- Airline operations22%
- National airspace system27%
- Weather4%
Frequently asked questions
- How often are flights from STL to FLL delayed?
- 23% of STL–FLL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from STL to FLL?
- Southwest Airlines has the best on-time record on this route at 78%, based on 1,462 flights. 2 airlines flew STL–FLL frequently enough to compare in this period.
- What is the best time of day to fly from STL to FLL?
- Departures around 5 a.m. have the best record (95% on-time), while departures around 1 p.m. have the worst (61%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STL to FLL?
- The scheduled STL–FLL flight time averages 2h 40m over 1,057 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are STL to FLL flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from STL to FLL?
- July 2024 was the roughest month in this dataset, with only 60% of arrivals on time. The best was November 2024 at 90%. If your dates are flexible, that 31-point gap is worth planning around.
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Based on 1,722 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.