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

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

Historically, 77.3% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 843 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
77.3%arrived on time
13.0%30+ min late
0.5%cancelled
843scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.2%all scheduled flights
120+ minutes late2.1%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+5.3 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 morning37494.9%2.7%0.3%
Late morning10082.0%11.0%0.0%
Afternoon15661.5%19.2%1.9%
Evening20855.8%28.4%0.0%

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
Monday10374.8%12.6%1.0%
Tuesday9391.4%7.5%1.1%
Wednesday8285.4%3.7%0.0%
Thursday12277.9%12.3%0.0%
Friday9968.7%18.2%0.0%
Saturday17479.3%12.1%0.0%
Sunday17070.0%19.4%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 Airlines76677.9%12.4%0.4%
Spirit Airlines7372.6%17.8%1.4%
Frontier Airlines450.0%50.0%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20258483.3%13.1%0.0%
August 20255877.6%12.1%0.0%
September 20254697.8%2.2%0.0%
October 20255583.6%7.3%0.0%
November 20258278.0%12.2%1.2%
December 20258272.0%19.5%0.0%
January 20267779.2%6.5%0.0%
February 20268068.8%16.2%0.0%
March 20268471.4%15.5%3.6%
April 20266280.6%12.9%0.0%
May 20266773.1%16.4%0.0%
June 20266672.7%16.7%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.

Airline39.7%
Late aircraft41.2%
National airspace16.4%
Weather2.5%
Security0.2%
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.