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

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

80.5% of 946 official scheduled IAH-to-SJU flights arrived on time; 11.2% arrived at least 30 minutes late and 0.5% 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
80.5%arrived on time
11.2%30+ min late
0.5%cancelled
946scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.8%all scheduled flights
120+ minutes late1.9%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+1.6 mincompleted flights

Which departure time was most reliable for IAH to SJU?

Among qualifying IAH-to-SJU departure window results, Afternoon had the highest on-time rate: 85.4% of 397 flights. Late morning was lowest at 74.8% across 397 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning39774.8%13.4%0.8%
Afternoon39785.4%9.3%0.3%
Night14383.9%9.8%0.7%

Which weekday was most reliable for IAH to SJU?

Among qualifying IAH-to-SJU weekday results, Tuesday had the highest on-time rate: 88.6% of 132 flights. Saturday was lowest at 71.7% across 145 flights.

DayFlightsOn time30+ minCancelled
Monday12186.0%8.3%0.0%
Tuesday13288.6%8.3%0.0%
Wednesday11882.2%11.0%0.0%
Thursday14180.9%13.5%0.0%
Friday13482.8%9.0%0.7%
Saturday14571.7%13.8%2.1%
Sunday15574.2%13.5%0.6%

Which airline was most reliable for IAH to SJU?

Among qualifying IAH-to-SJU airline results, United Airlines had the highest on-time rate: 82.5% of 872 flights. Spirit Airlines was lowest at 58.1% across 74 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines87282.5%9.5%0.3%
Spirit Airlines7458.1%31.1%2.7%

Which month was most reliable for IAH to SJU?

Among qualifying IAH-to-SJU month results, April 2026 had the highest on-time rate: 93.3% of 60 flights. August 2025 was lowest at 65.6% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 202511169.4%22.5%0.0%
August 20259365.6%15.1%0.0%
September 20256889.7%4.4%0.0%
October 20257085.7%8.6%0.0%
November 20256875.0%17.6%0.0%
December 20259276.1%14.1%1.1%
January 20268086.2%3.8%5.0%
February 20266791.0%3.0%0.0%
March 20267481.1%12.2%0.0%
April 20266093.3%3.3%0.0%
May 20267382.2%13.7%0.0%
June 20269084.4%7.8%0.0%

What drove IAH to SJU delay minutes?

Late aircraft was the largest recorded IAH-to-SJU delay category, accounting for 34.9% of 10,257 BTS-attributed delay minutes during July 2025–June 2026.

Airline31.4%
Late aircraft34.9%
National airspace28.6%
Weather5.1%
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.