BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
STL→FLL

St. Louis, MO (STL) to Fort Lauderdale, FL (FLL) flight delay odds

73.4% of 841 official scheduled STL-to-FLL flights arrived on time; 14.9% arrived at least 30 minutes late and 0.5% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
73.4%arrived on time
14.9%30+ min late
0.5%cancelled
841scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.4%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+10.2 mincompleted flights

Which departure time was most reliable for STL to FLL?

Among qualifying STL-to-FLL departure window results, Early morning had the highest on-time rate: 88.5% of 209 flights. Afternoon was lowest at 59.4% across 143 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning20988.5%4.3%0.0%
Late morning15875.9%13.9%0.0%
Afternoon14359.4%22.4%0.7%
Evening33168.6%18.7%0.9%

Which weekday was most reliable for STL to FLL?

Among qualifying STL-to-FLL weekday results, Wednesday had the highest on-time rate: 90.2% of 82 flights. Sunday was lowest at 67.6% across 170 flights.

DayFlightsOn time30+ minCancelled
Monday10074.0%15.0%1.0%
Tuesday9379.6%10.8%0.0%
Wednesday8290.2%3.7%0.0%
Thursday12274.6%15.6%0.0%
Friday10070.0%17.0%0.0%
Saturday17468.4%17.8%0.6%
Sunday17067.6%17.6%1.2%

Which airline was most reliable for STL to FLL?

Among qualifying STL-to-FLL airline results, Southwest Airlines had the highest on-time rate: 73.7% of 764 flights. Spirit Airlines was lowest at 69.9% across 73 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines76473.7%14.3%0.4%
Spirit Airlines7369.9%20.5%1.4%
Frontier Airlines475.0%25.0%0.0%

Which month was most reliable for STL to FLL?

Among qualifying STL-to-FLL month results, September 2025 had the highest on-time rate: 84.8% of 46 flights. June 2026 was lowest at 65.2% across 66 flights.

MonthFlightsOn time30+ minCancelled
July 20258469.0%20.2%0.0%
August 20255778.9%15.8%0.0%
September 20254684.8%6.5%0.0%
October 20255572.7%12.7%0.0%
November 20258275.6%18.3%1.2%
December 20258167.9%24.7%1.2%
January 20267767.5%14.3%0.0%
February 20267983.5%6.3%0.0%
March 20268567.1%16.5%2.4%
April 20266277.4%11.3%0.0%
May 20266777.6%10.4%0.0%
June 20266665.2%15.2%0.0%

What drove STL to FLL delay minutes?

Late aircraft was the largest recorded STL-to-FLL delay category, accounting for 54.1% of 12,485 BTS-attributed delay minutes during July 2025–June 2026.

Airline19.5%
Late aircraft54.1%
National airspace20.3%
Weather5.2%
Security0.9%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.