Historical on-time performance
Salt Lake City to Houston
1,195 miData through May 2026Source: US DOT · BTS
Flights on SLC–IAH arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 1,896 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time86%Medianon timep9020 minCancel1.5%Flights885
- Delta Air LinesOn-time82%Medianon timep9030 minCancel0.2%Flights1,011
Why flights run late
Delay causes
- Airline52%
- Weather5%
- Air traffic (NAS)25%
- Late aircraft18%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline53%
- Weather40%
- Air traffic (NAS)7%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 15 cancellations with a reported cause (BTS reports causes from June 2003).
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 (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 2,370 flights
- Afternoons79% on time · p90 35 min · 859 flights
- Evenings79% on time · p90 50 min · 843 flights
- Middays78% on time · p90 35 min · 1,622 flights
- Overnights72% on time · p90 65 min · 253 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 85% on time.
- Tuesdays85% on time · p90 25 min · 854 flights
- Fridays83% on time · p90 30 min · 877 flights
- Thursdays82% on time · p90 35 min · 871 flights
- Saturdays82% on time · p90 30 min · 776 flights
- Wednesdays82% on time · p90 35 min · 856 flights
- Mondays81% on time · p90 30 min · 863 flights
- Sundays81% on time · p90 30 min · 850 flights
Keep exploring