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

San Antonio, TX (SAT) to Houston, TX (IAH) flight delay odds

80.9% of 2,410 official scheduled SAT-to-IAH flights arrived on time; 10.4% arrived at least 30 minutes late and 0.7% 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 SIGNALLower disruption
80.9%arrived on time
10.4%30+ min late
0.7%cancelled
2,410scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.2%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+5.0 mincompleted flights

Which departure time was most reliable for SAT to IAH?

Among qualifying SAT-to-IAH departure window results, Late morning had the highest on-time rate: 85.4% of 588 flights. Evening was lowest at 77.7% across 552 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning61982.7%6.8%1.6%
Late morning58885.4%8.2%0.7%
Afternoon65177.9%13.8%0.0%
Evening55277.7%12.7%0.5%

Which weekday was most reliable for SAT to IAH?

Among qualifying SAT-to-IAH weekday results, Tuesday had the highest on-time rate: 87.1% of 350 flights. Sunday was lowest at 77.6% across 343 flights.

DayFlightsOn time30+ minCancelled
Monday35184.6%9.4%1.1%
Tuesday35087.1%5.7%0.9%
Wednesday34981.1%9.5%0.3%
Thursday33977.6%10.3%0.9%
Friday34377.6%13.7%0.0%
Saturday33580.6%11.6%0.9%
Sunday34377.6%12.5%0.9%

Which airline was most reliable for SAT to IAH?

Among qualifying SAT-to-IAH airline results, SkyWest Airlines had the highest on-time rate: 81.4% of 86 flights. United Airlines was lowest at 80.9% across 2,324 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines2,32480.9%10.3%0.7%
SkyWest Airlines8681.4%11.6%1.2%

Which month was most reliable for SAT to IAH?

Among qualifying SAT-to-IAH month results, January 2026 had the highest on-time rate: 91.1% of 180 flights. October 2025 was lowest at 71.8% across 213 flights.

MonthFlightsOn time30+ minCancelled
July 202518574.6%16.8%1.6%
August 202520877.9%11.1%1.4%
September 202522983.0%5.2%0.0%
October 202521371.8%10.8%0.5%
November 202520783.1%12.1%1.0%
December 202521685.2%6.5%0.5%
January 202618091.1%5.0%0.6%
February 202616890.5%7.7%0.0%
March 202623378.1%13.3%2.6%
April 202621681.0%12.0%0.0%
May 202618479.3%10.9%0.0%
June 202617177.2%13.5%0.0%

What drove SAT to IAH delay minutes?

National airspace was the largest recorded SAT-to-IAH delay category, accounting for 46.4% of 28,008 BTS-attributed delay minutes during July 2025–June 2026.

Airline23.8%
Late aircraft27.7%
National airspace46.4%
Weather2.0%
Security0.0%
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.