Salt Lake City (SLC) to Houston (IAH): On-Time Performance
Data through July 2026
When you fly SLC to IAH matters as much as anything else about the booking: the route swung from 91% on-time in September 2025 to just 69% in July 2025. Across the full period the route averages 83% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 78%), which matters most in the rough months.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 5.3
- last 12 months
- Duration
- 3h 5m
- scheduled
- Distance
- 1,195 mi
Best airline from SLC to IAH
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 85% | 12 min | 1.7% | 1,790 |
| Delta Air Lines | 82% | 14 min | 0.5% | 2,130 |
| SkyWest Airlines | 82% | 15 min | 1.1% | 181 |
Monthly on-time trend
Best time to fly from SLC to IAH
Aim for departures around 7 a.m. (90% on-time); avoid 6 p.m. departures (74%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 12 min |
| Tuesdaybest | 86% | 9 min |
| Wednesday | 83% | 14 min |
| Thursday | 83% | 15 min |
| Friday | 84% | 15 min |
| Saturday | 81% | 14 min |
| Sunday | 84% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft20%
- Airline operations52%
- National airspace system23%
- Weather5%
Frequently asked questions
- How often are flights from SLC to IAH delayed?
- 17% of SLC–IAH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from SLC to IAH?
- United Airlines has the best on-time record on this route at 85%, based on 1,790 flights. 3 airlines flew SLC–IAH frequently enough to compare in this period.
- What is the best time of day to fly from SLC to IAH?
- Departures around 7 a.m. have the best record (90% on-time), while departures around 6 p.m. have the worst (74%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SLC to IAH?
- The scheduled SLC–IAH flight time averages 3h 5m over 1,195 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are SLC to IAH flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SLC to IAH?
- July 2025 was the roughest month in this dataset, with only 69% of arrivals on time. The best was September 2025 at 91%. If your dates are flexible, that 22-point gap is worth planning around.
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Based on 4,101 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.