Route
IAH → SLC
George Bush Intercontinental Airport Salt Lake City International Airport
How punctual is this route?
- On-time arrivals
- 83.4%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 84 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,932
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 46%
- Late-arriving aircraft 39%
- Air traffic control & airport 11%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 90.7% | 161 |
| October 2025 | 81.4% | 146 |
| November 2025 | 79.6% | 137 |
| December 2025 | 81.0% | 185 |
| January 2026 | 91.1% | 193 |
| February 2026 | 90.2% | 175 |
| March 2026 | 81.1% | 211 |
| April 2026 | 81.8% | 144 |
| May 2026 | 79.1% | 149 |
| June 2026 | 77.5% | 142 |
| July 2026 | 82.8% | 146 |
| August 2026 | 81.0% | 143 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Delta Air Lines | 1,016 | 83.3% | 0.4% | 95 min |
| United Airlines | 856 | 83.6% | 0.5% | 71 min |
| SkyWest Airlines | 60 | 79.7% | 1.7% | 70 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL1583
14% late · 365 flights
-
UA2157
23% late · 362 flights
-
DL1532
16% late · 324 flights
-
UA2242
14% late · 295 flights
-
DL1299
20% late · 195 flights
-
DL1278
19% late · 94 flights
-
UA1823
10% late · 82 flights
-
OO5257
20% late · 45 flights
-
DL2376
23% late · 26 flights
-
UA756
15% late · 26 flights
-
UA492
4% late · 24 flights
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