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

Houston, TX (IAH) to San Diego, CA (SAN) flight delay odds

80.8% of 1,693 official scheduled IAH-to-SAN flights arrived on time; 11.8% arrived at least 30 minutes late and 0.4% 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
80.8%arrived on time
11.8%30+ min late
0.4%cancelled
1,693scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.0%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+1.5 mincompleted flights

Which departure time was most reliable for IAH to SAN?

Among qualifying IAH-to-SAN departure window results, Late morning had the highest on-time rate: 86.0% of 365 flights. Evening was lowest at 75.0% across 615 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning36586.0%9.0%0.3%
Afternoon71383.2%10.8%0.1%
Evening61575.0%14.5%0.8%

Which weekday was most reliable for IAH to SAN?

Among qualifying IAH-to-SAN weekday results, Tuesday had the highest on-time rate: 86.6% of 224 flights. Thursday was lowest at 75.0% across 252 flights.

DayFlightsOn time30+ minCancelled
Monday25579.6%12.5%0.8%
Tuesday22486.6%9.4%0.0%
Wednesday24686.6%6.9%0.8%
Thursday25275.0%13.9%0.0%
Friday24378.2%16.5%0.4%
Saturday21982.6%11.4%0.5%
Sunday25478.0%11.4%0.4%

Which airline was most reliable for IAH to SAN?

Only United Airlines met the IAH-to-SAN airline threshold: 80.8% of 1,693 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines1,69380.8%11.8%0.4%

Which month was most reliable for IAH to SAN?

Among qualifying IAH-to-SAN month results, February 2026 had the highest on-time rate: 91.3% of 127 flights. July 2025 was lowest at 66.7% across 141 flights.

MonthFlightsOn time30+ minCancelled
July 202514166.7%22.0%2.1%
August 202514174.5%16.3%0.7%
September 202513788.3%6.6%0.7%
October 202514784.4%8.2%0.0%
November 202514279.6%10.6%0.0%
December 202514582.1%12.4%0.0%
January 202612882.8%11.7%0.0%
February 202612791.3%4.7%0.0%
March 202615285.5%9.2%1.3%
April 202614281.7%7.0%0.0%
May 202614982.6%12.1%0.0%
June 202614271.1%19.7%0.0%

What drove IAH to SAN delay minutes?

Late aircraft was the largest recorded IAH-to-SAN delay category, accounting for 37.9% of 19,023 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.0%
Late aircraft37.9%
National airspace22.4%
Weather9.7%
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.