Route Reliability
Ontario → Las Vegas
ONT–LAS · 197 miles · Ontario International Airport to Harry Reid International Airport
- 79%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 0.8%
- Cancelled
- 2,484
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Frontier Airlines79%721 flights
- 2.Southwest Airlines78%1,763 flights
What the data says
Morning flights do better here.
ONT–LAS flights departing between 3–6 AM arrived on time 97% of the time, versus 67% between 6–9 PM.
Friday is doing you no favors.
ONT–LAS flights arrived on time 87% of the time on Saturdays and just 69% on Fridays. That gap is worth planning around.
Not much between Frontier Airlines and Southwest Airlines.
On this route they all land within 78% to 79% on time. Pick on schedule and price.
Recent months have been rougher.
ONT–LAS flights arrived on time 72% of the time over the last three months in the data, compared with 87% 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
- Mon74%(387 flights)
- Tue84%(323 flights)
- Wed86%(332 flights)
- Thu75%(385 flights)
- Fri69%(387 flights)
- Sat87%(268 flights)
- Sun80%(380 flights)
- 3–6 AM97%(249 flights)
- 6–9 AM93%(492 flights)
- 9 AM–12 PM84%(309 flights)
- 12–3 PM70%(338 flights)
- 3–6 PM68%(479 flights)
- 6–9 PM67%(325 flights)
- 9 PM–12 AM72%(270 flights)
Jun 73% → May 65% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 208 |
| July 2025 | 75% | 214 |
| August 2025 | 82% | 201 |
| September 2025 | 78% | 201 |
| October 2025 | 80% | 227 |
| November 2025 | 78% | 207 |
| December 2025 | 85% | 204 |
| January 2026 | 85% | 211 |
| February 2026 | 90% | 191 |
| March 2026 | 80% | 197 |
| April 2026 | 73% | 202 |
| May 2026 | 65% | 199 |
Same trip, other airports
Keep nerding
Based on 2,484 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.