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

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

Historically, 80.9% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,410 flights.

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

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 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%

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
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%

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 Airlines2,32480.9%10.3%0.7%
SkyWest Airlines8681.4%11.6%1.2%

Monthly trend

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

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 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.

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.