Historical on-time performance
Salt Lake City to Houston
1,195 miData through Dec 2025Source: US DOT · BTS
Flights on SLC–IAH arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 1,913 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time83%Medianon timep9025 minCancel1.2%Flights914
- Delta Air LinesOn-time81%Medianon timep9030 minCancel0.4%Flights999
Why flights run late
Delay causes
- Airline55%
- Weather1%
- Air traffic (NAS)23%
- Late aircraft21%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SLC → IAH
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 86% on time.
- Mornings86% on time · p90 20 min · 2,366 flights
- Evenings79% on time · p90 50 min · 720 flights
- Afternoons77% on time · p90 40 min · 918 flights
- Middays76% on time · p90 40 min · 1,605 flights
- Overnights72% on time · p90 65 min · 373 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 82% on time.
- Tuesdays82% on time · p90 30 min · 870 flights
- Fridays81% on time · p90 30 min · 874 flights
- Saturdays81% on time · p90 40 min · 777 flights
- Mondays80% on time · p90 35 min · 877 flights
- Wednesdays80% on time · p90 35 min · 865 flights
- Thursdays79% on time · p90 40 min · 869 flights
- Sundays78% on time · p90 35 min · 850 flights
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