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

San Juan, PR (SJU) to Houston, TX (IAH) flight delay odds

86.9% of 948 official scheduled SJU-to-IAH flights arrived on time; 7.9% arrived at least 30 minutes late and 0.6% 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
86.9%arrived on time
7.9%30+ min late
0.6%cancelled
948scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.5%all scheduled flights
120+ minutes late0.9%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival-9.3 mincompleted flights

Which departure time was most reliable for SJU to IAH?

Among qualifying SJU-to-IAH departure window results, Early morning had the highest on-time rate: 93.5% of 383 flights. Afternoon was lowest at 79.3% across 387 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning38393.5%3.7%0.8%
Late morning7788.3%7.8%1.3%
Afternoon38779.3%12.4%0.5%
Night9193.4%3.3%0.0%

Which weekday was most reliable for SJU to IAH?

Among qualifying SJU-to-IAH weekday results, Tuesday had the highest on-time rate: 90.3% of 134 flights. Sunday was lowest at 82.7% across 156 flights.

DayFlightsOn time30+ minCancelled
Monday13387.2%5.3%0.8%
Tuesday13490.3%6.7%0.0%
Wednesday11789.7%6.0%0.0%
Thursday14185.8%9.9%0.0%
Friday12289.3%5.7%0.0%
Saturday14584.8%6.2%2.8%
Sunday15682.7%14.1%0.6%

Which airline was most reliable for SJU to IAH?

Among qualifying SJU-to-IAH airline results, United Airlines had the highest on-time rate: 88.2% of 872 flights. Spirit Airlines was lowest at 72.4% across 76 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines87288.2%6.9%0.6%
Spirit Airlines7672.4%19.7%1.3%

Which month was most reliable for SJU to IAH?

Among qualifying SJU-to-IAH month results, September 2025 had the highest on-time rate: 94.1% of 68 flights. October 2025 was lowest at 78.6% across 70 flights.

MonthFlightsOn time30+ minCancelled
July 202511191.9%4.5%0.9%
August 20259480.9%12.8%0.0%
September 20256894.1%2.9%0.0%
October 20257078.6%15.7%0.0%
November 20256879.4%20.6%0.0%
December 20259187.9%5.5%0.0%
January 20268184.0%8.6%4.9%
February 20266786.6%9.0%1.5%
March 20267688.2%7.9%0.0%
April 20266088.3%3.3%0.0%
May 20267291.7%1.4%0.0%
June 20269090.0%4.4%0.0%

What drove SJU to IAH delay minutes?

Late aircraft was the largest recorded SJU-to-IAH delay category, accounting for 53.0% of 6,416 BTS-attributed delay minutes during July 2025–June 2026.

Airline24.1%
Late aircraft53.0%
National airspace22.9%
Weather0.0%
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.