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

Houston, TX (IAH) to Miami, FL (MIA) flight delay odds

76.7% of 3,736 official scheduled IAH-to-MIA flights arrived on time; 14.6% arrived at least 30 minutes late and 1.2% 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
76.7%arrived on time
14.6%30+ min late
1.2%cancelled
3,736scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.5%all scheduled flights
120+ minutes late4.0%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+10.6 mincompleted flights

Which departure time was most reliable for IAH to MIA?

Among qualifying IAH-to-MIA departure window results, Early morning had the highest on-time rate: 87.6% of 1,157 flights. Evening was lowest at 65.9% across 1,062 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,15787.6%7.1%1.1%
Late morning59076.9%14.2%0.3%
Afternoon89875.1%15.7%0.9%
Evening1,06265.9%22.0%1.9%

Which weekday was most reliable for IAH to MIA?

Among qualifying IAH-to-MIA weekday results, Tuesday had the highest on-time rate: 82.2% of 483 flights. Sunday was lowest at 68.8% across 565 flights.

DayFlightsOn time30+ minCancelled
Monday55079.3%13.3%2.2%
Tuesday48382.2%11.2%1.0%
Wednesday49580.0%12.5%0.6%
Thursday55377.9%13.7%0.9%
Friday54777.7%14.3%1.1%
Saturday54372.0%17.5%0.6%
Sunday56568.8%19.1%1.6%

Which airline was most reliable for IAH to MIA?

Among qualifying IAH-to-MIA airline results, United Airlines had the highest on-time rate: 79.7% of 1,479 flights. Frontier Airlines was lowest at 67.5% across 154 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines1,52677.1%14.3%1.3%
United Airlines1,47979.7%12.2%0.4%
Spirit Airlines44168.5%20.2%3.2%
Frontier Airlines15467.5%22.1%1.9%
Envoy Air12277.9%15.6%0.0%
Republic Airways1464.3%35.7%0.0%

Which month was most reliable for IAH to MIA?

Among qualifying IAH-to-MIA month results, October 2025 had the highest on-time rate: 83.6% of 304 flights. July 2025 was lowest at 64.1% across 312 flights.

MonthFlightsOn time30+ minCancelled
July 202531264.1%19.6%2.6%
August 202530070.7%20.7%0.7%
September 202527680.8%13.4%0.4%
October 202530483.6%9.9%0.3%
November 202533380.2%10.8%1.5%
December 202533982.0%11.2%0.3%
January 202634181.5%11.1%1.8%
February 202630980.6%12.3%1.3%
March 202634166.6%22.3%2.9%
April 202631079.4%13.5%1.0%
May 202629476.9%14.3%0.0%
June 202627774.0%16.6%0.7%

What drove IAH to MIA delay minutes?

Late aircraft was the largest recorded IAH-to-MIA delay category, accounting for 41.6% of 72,685 BTS-attributed delay minutes during July 2025–June 2026.

Airline32.2%
Late aircraft41.6%
National airspace18.5%
Weather7.6%
Security0.1%
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.