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

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

Historically, 73.4% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 841 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 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%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.