Route
IAH → LAS
George Bush Intercontinental Airport Harry Reid International Airport
How punctual is this route?
- On-time arrivals
- 82.8%
- Less than 15 minutes late
- Cancelled
- 0.9%
- Of scheduled flights
- Average delay when late
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,409
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 39%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 23%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.1% | 255 |
| October 2025 | 83.2% | 292 |
| November 2025 | 79.4% | 311 |
| December 2025 | 90.2% | 307 |
| January 2026 | 87.9% | 282 |
| February 2026 | 90.9% | 291 |
| March 2026 | 84.8% | 323 |
| April 2026 | 78.4% | 295 |
| May 2026 | 81.7% | 263 |
| June 2026 | 73.9% | 261 |
| July 2026 | 75.0% | 264 |
| August 2026 | 83.5% | 265 |
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 |
|---|---|---|---|---|
| United Airlines | 2,598 | 85.2% | 0.3% | 65 min |
| Frontier Airlines | 410 | 70.1% | 2.9% | 108 min |
| NK | 401 | 80.3% | 2.5% | 78 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1799
12% late · 365 flights
-
UA1971
15% late · 364 flights
-
UA1264
5% late · 324 flights
-
UA1524
11% late · 251 flights
-
F94131
24% late · 211 flights
-
UA2406
23% late · 163 flights
-
F91965
44% late · 142 flights
-
UA2339
19% late · 110 flights
-
UA1360
32% late · 100 flights
-
UA1183
15% late · 96 flights
-
NK1254
22% late · 94 flights
-
UA1331
14% late · 69 flights
-
UA2190
16% late · 66 flights
-
UA2236
14% late · 64 flights
-
NK1982
14% late · 59 flights
-
NK1807
14% late · 58 flights
-
F91489
16% late · 56 flights
-
UA2658
24% late · 46 flights
-
UA1416
3% late · 37 flights
-
UA317
3% late · 37 flights
-
UA507
16% late · 37 flights
-
UA1764
22% late · 36 flights
-
UA1448
38% late · 35 flights
-
NK2303
27% late · 33 flights
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