Route Reliability
Houston → Las Vegas
IAH–LAS · 1,222 miles · George Bush Intercontinental Airport to Harry Reid International Airport
- 83%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 0.8%
- Cancelled
- 3,485
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines84%2,607 flights
- 2.Spirit Airlines82%587 flights
- 3.Frontier Airlines70%291 flights
What the data says
Morning-you made the right choice.
IAH–LAS flights departing between 6–9 AM arrived on time 91% of the time, versus 75% between 6–9 PM.
Friday is doing you no favors.
IAH–LAS flights arrived on time 89% of the time on Wednesdays. On Fridays: 78%.
United Airlines runs this route best.
United Airlines arrived on time 84% of the time on this route; Frontier Airlines managed 70%.
Recent months have been rougher.
IAH–LAS flights arrived on time 82% of the time over the last three months in the data, compared with 90% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon79%(517 flights)
- Tue88%(420 flights)
- Wed89%(459 flights)
- Thu81%(519 flights)
- Fri78%(523 flights)
- Sat85%(472 flights)
- Sun80%(541 flights)
- 3–6 AM—(3 flights)
- 6–9 AM91%(476 flights)
- 9 AM–12 PM88%(600 flights)
- 12–3 PM84%(753 flights)
- 3–6 PM82%(480 flights)
- 6–9 PM75%(804 flights)
- 9 PM–12 AM76%(335 flights)
Jun 71% → May 82% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 281 |
| July 2025 | 77% | 289 |
| August 2025 | 80% | 283 |
| September 2025 | 84% | 254 |
| October 2025 | 83% | 291 |
| November 2025 | 80% | 311 |
| December 2025 | 91% | 307 |
| January 2026 | 88% | 280 |
| February 2026 | 92% | 287 |
| March 2026 | 85% | 315 |
| April 2026 | 79% | 291 |
| May 2026 | 82% | 262 |
Same trip, other airports
Keep nerding
Based on 3,485 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.