Best Time to Fly ONT to DFW: On-Time Stats by Hour & Airline
Ontario International → Dallas/Fort Worth International
Data through July 2026 · Last updated October 18, 2026
2,297 flights were scheduled from Ontario (ONT) to Dallas/Fort Worth (DFW) in the last 12 months, and 79.3% of those that flew arrived on time, 1.7 points above the US average of 77.6%.
Among 2 airlines, American Airlines led with 80.2% on time and Frontier Airlines was last with 74.1%.
Over 24 months, Thursday was the most reliable day (81% on time) and July the worst month (72%).
The cancellation rate was 2.7% (US average 1.8%).
ONT to DFW on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| American Airlines | 80.2% | 107 min | 2.8% | 1,970 |
| Frontier Airlines | 74.1% | 64 min | 1.8% | 327 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ONT to DFW
On-time arrival % by scheduled departure hour (local time), 4,673 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 88.4% | 4.4% | 45 |
| 5am–6am | 90.3% | 0.9% | 115 |
| 6am–7am | 87.3% | 1.6% | 745 |
| 7am–8am | 89.8% | 2.1% | 468 |
| 8am–9am | 81.4% | 1.9% | 379 |
| 9am–10am | Limited data | 27 | |
| 10am–11am | 77.3% | 2.0% | 751 |
| 11am–12pm | Limited data | 13 | |
| 12pm–1pm | 73.8% | 1.5% | 531 |
| 1pm–2pm | Limited data | 3 | |
| 2pm–3pm | 69.8% | 3.1% | 642 |
| 3pm–4pm | 71.6% | 4.4% | 114 |
| 4pm–5pm | 70.7% | 2.4% | 42 |
| 5pm–6pm | Limited data | 27 | |
| 6pm–7pm | 71.8% | 0.0% | 85 |
| 7pm–8pm | 79.6% | 3.6% | 56 |
| 8pm–9pm | 76.3% | 13.0% | 69 |
| 11pm–12am | 84.6% | 3.6% | 561 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ONT to DFW
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 74.7% | -7.5 pts | 0.0% | 91 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.2% | -6.0 pts | 2.4% | 209 |
| Summer peak (Jun 15 - Aug 15) | 72.1% | -10.2 pts | 3.0% | 880 |
| All other days | 82.2% | — | 2.4% | 3,493 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).