SLC to IAH flight delays & on-time performance
Nonstop flights from Salt Lake City International Airport to George Bush Intercontinental Airport · 1,195 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SLC or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Salt Lake City (SLC) to Houston (IAH) arrived on time 86% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.8% were cancelled, and 5% arrived an hour or more late.
- United Airlines was the most punctual airline here (88% on time); Delta Air Lines was the least (83%).
- Departures scheduled around 7am did best (92% on time); around 5pm did worst (79%).
- Tuesday was the most reliable day to fly (88% on time) and Wednesday the least (83%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (52%).
Which airline is most on time from SLC to IAH?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 88% | 1.4% | 9 min | 3.8% | 873 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 87% | 1.6% | 8 min | 3.2% | 64 |
| Delta Air Lines | 83% | 0.2% | 14 min | 5.3% | 1,012 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am91%140 flights
- 7am92%463 flights
- 8am98%55 flights
- 9am85%144 flights
- 11am100%23 flights
- 1pm82%589 flights
- 3pm83%35 flights
- 4pm87%123 flights
- 5pm79%334 flights
- 6pm74%31 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday85%1.1% cancelled
- Tuesday88%1.1% cancelled
- Wednesday83%0.7% cancelled
- Thursday85%0.7% cancelled
- Friday88%0.7% cancelled
- Saturday85%0.8% cancelled
- Sunday85%0.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)52%
- Air traffic control & airport congestion24%
- Late-arriving aircraft19%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)60%
- Extreme weather33%
- Air traffic control & airport congestion7%
- Security0%
SLC to IAH: common questions
- How often are SLC to IAH flights on time?
- 86% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Salt Lake City to Houston cancelled?
- 0.8% of scheduled flights were cancelled (15 of 1,949).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 75 min behind schedule on average, and 4.6% of flights were an hour or more late.
- How long is taxi time at SLC?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to SLC — 83% on time
More flights from Salt Lake City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SLC → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.