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

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

76.2% of 3,737 official scheduled MIA-to-IAH flights arrived on time; 15.7% arrived at least 30 minutes late and 1.1% 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
76.2%arrived on time
15.7%30+ min late
1.1%cancelled
3,737scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.2%all scheduled flights
120+ minutes late3.9%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+7.3 mincompleted flights

Which departure time was most reliable for MIA to IAH?

Among qualifying MIA-to-IAH departure window results, Early morning had the highest on-time rate: 89.8% of 983 flights. Evening was lowest at 63.5% across 521 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning98389.8%5.8%0.3%
Late morning42486.1%7.1%0.7%
Afternoon1,34271.5%19.6%1.1%
Evening52163.5%24.6%1.7%
Night46766.4%23.3%2.6%

Which weekday was most reliable for MIA to IAH?

Among qualifying MIA-to-IAH weekday results, Wednesday had the highest on-time rate: 80.6% of 479 flights. Sunday was lowest at 68.0% across 566 flights.

DayFlightsOn time30+ minCancelled
Monday55077.8%13.8%2.2%
Tuesday50180.0%13.2%1.2%
Wednesday47980.6%12.9%0.4%
Thursday55177.0%14.9%1.3%
Friday54877.4%15.0%0.4%
Saturday54273.8%18.3%1.1%
Sunday56668.0%21.2%1.2%

Which airline was most reliable for MIA to IAH?

Among qualifying MIA-to-IAH airline results, Envoy Air had the highest on-time rate: 86.9% of 122 flights. Spirit Airlines was lowest at 67.5% across 440 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines1,52769.2%20.4%1.2%
United Airlines1,47985.2%9.2%0.6%
Spirit Airlines44067.5%23.0%2.7%
Frontier Airlines15577.4%16.1%1.3%
Envoy Air12286.9%7.4%0.0%
Republic Airways1464.3%28.6%0.0%

Which month was most reliable for MIA to IAH?

Among qualifying MIA-to-IAH month results, January 2026 had the highest on-time rate: 82.7% of 342 flights. August 2025 was lowest at 66.3% across 300 flights.

MonthFlightsOn time30+ minCancelled
July 202531166.6%25.4%2.3%
August 202530066.3%24.0%1.0%
September 202527680.8%14.5%0.0%
October 202530479.9%14.1%0.3%
November 202533278.0%13.3%1.5%
December 202534081.8%8.5%0.0%
January 202634282.7%9.6%2.3%
February 202631081.0%11.0%1.3%
March 202634167.2%22.6%2.6%
April 202631077.4%16.5%1.0%
May 202629473.8%16.0%0.7%
June 202627779.1%13.7%0.0%

What drove MIA to IAH delay minutes?

Late aircraft was the largest recorded MIA-to-IAH delay category, accounting for 34.2% of 67,232 BTS-attributed delay minutes during July 2025–June 2026.

Airline31.7%
Late aircraft34.2%
National airspace27.3%
Weather6.6%
Security0.3%
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.