Best Time to Fly SLC to IAH: On-Time Stats by Hour & Airline
Salt Lake City International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
1,949 flights were scheduled from Salt Lake City (SLC) to Houston (IAH) in the last 12 months, and 85.5% of those that flew arrived on time, 7.9 points above the US average of 77.6%.
Among 3 airlines, United Airlines led with 88.2% on time and Delta Air Lines was last with 83.1%.
Over 24 months, Tuesday was the most reliable day (86% on time) and July the worst month (76%).
The cancellation rate was 0.8% (US average 1.8%).
SLC to IAH on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 88.2% | 72 min | 1.4% | 873 |
| SkyWest Airlines | 87.1% | 57 min | 1.6% | 64 |
| Delta Air Lines | 83.1% | 78 min | 0.2% | 1,012 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to IAH
On-time arrival % by scheduled departure hour (local time), 3,949 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 89.6% | 1.1% | 264 |
| 7am–8am | 90.5% | 1.0% | 781 |
| 8am–9am | 88.1% | 0.3% | 329 |
| 9am–10am | 85.1% | 0.5% | 213 |
| 11am–12pm | 83.9% | 0.0% | 230 |
| 12pm–1pm | Limited data | 12 | |
| 1pm–2pm | 79.8% | 0.9% | 1,011 |
| 2pm–3pm | Limited data | 7 | |
| 3pm–4pm | 84.7% | 2.1% | 140 |
| 4pm–5pm | 83.0% | 1.3% | 232 |
| 5pm–6pm | 78.7% | 0.4% | 686 |
| 6pm–7pm | 74.2% | 0.0% | 31 |
| 8pm–9pm | Limited data | 13 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC to IAH
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 85.9% | +0.8 pts | 0.0% | 64 |
| Christmas & New Year (Dec 20 - Jan 3) | 85.6% | +0.5 pts | 0.5% | 211 |
| Summer peak (Jun 15 - Aug 15) | 77.3% | -7.8 pts | 0.7% | 599 |
| All other days | 85.1% | — | 0.9% | 3,075 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).