Which departure time was most reliable for LAS to ONT?
Among qualifying LAS-to-ONT departure window results, Early morning had the highest on-time rate: 91.5% of 411 flights. Night was lowest at 55.4% across 287 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 411 | 91.5% | 3.4% | 1.9% |
| Late morning | 434 | 82.3% | 9.0% | 0.0% |
| Afternoon | 675 | 73.8% | 14.7% | 0.4% |
| Evening | 672 | 70.4% | 19.6% | 0.9% |
| Night | 287 | 55.4% | 32.1% | 0.7% |
Which weekday was most reliable for LAS to ONT?
Among qualifying LAS-to-ONT weekday results, Tuesday had the highest on-time rate: 82.9% of 333 flights. Friday was lowest at 69.9% across 385 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 388 | 71.4% | 18.8% | 0.5% |
| Tuesday | 333 | 82.9% | 9.9% | 0.6% |
| Wednesday | 334 | 79.0% | 12.0% | 0.3% |
| Thursday | 385 | 73.5% | 17.4% | 0.5% |
| Friday | 385 | 69.9% | 19.7% | 1.0% |
| Saturday | 272 | 82.4% | 9.9% | 1.1% |
| Sunday | 382 | 70.7% | 15.7% | 1.3% |
Which airline was most reliable for LAS to ONT?
Among qualifying LAS-to-ONT airline results, Frontier Airlines had the highest on-time rate: 81.4% of 724 flights. Southwest Airlines was lowest at 72.6% across 1,755 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,755 | 72.6% | 16.5% | 0.7% |
| Frontier Airlines | 724 | 81.4% | 11.9% | 0.8% |
Which month was most reliable for LAS to ONT?
Among qualifying LAS-to-ONT month results, April 2026 had the highest on-time rate: 82.2% of 202 flights. June 2026 was lowest at 65.5% across 206 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 215 | 71.6% | 20.0% | 0.9% |
| August 2025 | 203 | 80.3% | 10.8% | 0.5% |
| September 2025 | 201 | 77.6% | 14.4% | 0.0% |
| October 2025 | 228 | 68.9% | 18.9% | 0.0% |
| November 2025 | 216 | 69.4% | 19.9% | 4.6% |
| December 2025 | 207 | 75.4% | 15.9% | 1.0% |
| January 2026 | 212 | 81.6% | 10.4% | 0.9% |
| February 2026 | 192 | 79.2% | 12.5% | 0.0% |
| March 2026 | 197 | 75.6% | 14.7% | 0.0% |
| April 2026 | 202 | 82.2% | 8.9% | 0.0% |
| May 2026 | 200 | 76.0% | 11.0% | 0.5% |
| June 2026 | 206 | 65.5% | 23.3% | 0.5% |
What drove LAS to ONT delay minutes?
Late aircraft was the largest recorded LAS-to-ONT delay category, accounting for 59.9% of 32,576 BTS-attributed delay minutes during July 2025–June 2026.
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