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

Houston, TX (IAH) to Salt Lake City, UT (SLC) flight delay odds

82.0% of 1,957 official scheduled IAH-to-SLC flights arrived on time; 11.0% 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
82.0%arrived on time
11.0%30+ min late
0.5%cancelled
1,957scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.4%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+5.5 mincompleted flights

Which departure time was most reliable for IAH to SLC?

Among qualifying IAH-to-SLC departure window results, Early morning had the highest on-time rate: 85.6% of 388 flights. Evening was lowest at 76.4% across 682 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning38885.6%8.0%0.3%
Late morning56684.8%9.4%0.9%
Afternoon32184.7%8.4%0.3%
Evening68276.4%15.2%0.4%

Which weekday was most reliable for IAH to SLC?

Among qualifying IAH-to-SLC weekday results, Saturday had the highest on-time rate: 86.8% of 257 flights. Sunday was lowest at 77.9% across 281 flights.

DayFlightsOn time30+ minCancelled
Monday28178.3%12.8%1.8%
Tuesday28385.9%9.5%0.7%
Wednesday28179.0%10.7%0.0%
Thursday28485.9%8.5%0.4%
Friday29080.7%14.1%0.0%
Saturday25786.8%7.4%0.4%
Sunday28177.9%13.5%0.4%

Which airline was most reliable for IAH to SLC?

Among qualifying IAH-to-SLC airline results, Delta Air Lines had the highest on-time rate: 82.2% of 1,011 flights. SkyWest Airlines was lowest at 77.6% across 67 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines1,01182.2%10.8%0.3%
United Airlines87982.1%11.1%0.7%
SkyWest Airlines6777.6%11.9%1.5%

Which month was most reliable for IAH to SLC?

Among qualifying IAH-to-SLC month results, September 2025 had the highest on-time rate: 90.7% of 161 flights. August 2025 was lowest at 76.9% across 160 flights.

MonthFlightsOn time30+ minCancelled
July 202515477.3%14.3%0.6%
August 202516076.9%13.1%0.6%
September 202516190.7%1.9%0.0%
October 202514680.8%11.6%0.0%
November 202513779.6%15.3%0.0%
December 202518580.5%12.4%0.5%
January 202619389.6%5.7%1.0%
February 202617589.7%4.6%0.0%
March 202621179.1%14.2%1.9%
April 202614481.2%11.1%0.0%
May 202614978.5%15.4%0.7%
June 202614277.5%14.1%0.0%

What drove IAH to SLC delay minutes?

Airline was the largest recorded IAH-to-SLC delay category, accounting for 46.1% of 26,573 BTS-attributed delay minutes during July 2025–June 2026.

Airline46.1%
Late aircraft37.5%
National airspace11.8%
Weather4.6%
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.