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

Houston, TX (IAH) to Fort Lauderdale, FL (FLL) flight delay odds

Historically, 78.8% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,760 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
78.8%arrived on time
13.2%30+ min late
1.2%cancelled
2,760scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.7%all scheduled flights
120+ minutes late2.8%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+4.8 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 morning78282.0%10.2%1.7%
Late morning47077.4%13.6%0.9%
Afternoon93779.5%12.2%1.4%
Evening57174.4%18.4%0.5%

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
Monday41180.3%10.7%1.5%
Tuesday35087.1%6.6%0.9%
Wednesday37682.7%10.4%0.5%
Thursday41477.5%13.8%1.0%
Friday41277.4%14.3%1.2%
Saturday38576.4%15.6%1.6%
Sunday41271.6%19.7%1.7%

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
United Airlines1,79284.2%9.5%0.7%
Spirit Airlines86470.3%19.6%1.9%
Frontier Airlines10456.7%22.1%3.8%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202519468.6%19.1%1.0%
August 202519477.3%15.5%1.0%
September 202519788.8%8.1%0.5%
October 202526586.4%6.0%0.0%
November 202526583.4%9.1%2.3%
December 202528379.2%15.5%0.0%
January 202627186.0%7.0%2.6%
February 202624884.3%9.3%1.2%
March 202629363.5%24.2%3.1%
April 202626279.0%13.4%1.1%
May 202615875.9%15.2%0.0%
June 202613067.7%18.5%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.

Airline33.7%
Late aircraft29.3%
National airspace31.8%
Weather4.9%
Security0.4%
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.