Best Time to Fly DFW to ONT: On-Time Stats by Hour & Airline
Dallas/Fort Worth International → Ontario International
Data through July 2026 · Last updated October 18, 2026
2,296 flights were scheduled from Dallas/Fort Worth (DFW) to Ontario (ONT) in the last 12 months, and 70.5% of those that flew arrived on time, 7.1 points below the US average of 77.6%.
Frontier Airlines was the most punctual of the 2 airlines on the route at 81.9%, while American Airlines trailed at 68.6%.
February has been the best month (84% on time) and Sunday the weakest day of the week (65%).
2.6% of flights were cancelled, versus 1.8% nationally.
DFW to ONT 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 |
|---|---|---|---|---|
| Frontier Airlines | 81.9% | 55 min | 1.8% | 327 |
| American Airlines | 68.6% | 69 min | 2.7% | 1,969 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DFW to ONT
On-time arrival % by scheduled departure hour (local time), 4,673 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 7 | |
| 6am–7am | 87.5% | 4.4% | 68 |
| 7am–8am | 87.5% | 0.0% | 40 |
| 8am–9am | 83.8% | 1.4% | 656 |
| 9am–10am | 60.4% | 1.0% | 97 |
| 10am–11am | 79.5% | 0.8% | 501 |
| 11am–12pm | 64.5% | 0.0% | 31 |
| 12pm–1pm | 81.0% | 2.1% | 750 |
| 1pm–2pm | Limited data | 29 | |
| 2pm–3pm | 74.6% | 0.0% | 59 |
| 3pm–4pm | 71.1% | 2.0% | 99 |
| 4pm–5pm | 68.0% | 2.5% | 80 |
| 5pm–6pm | 66.2% | 2.9% | 680 |
| 6pm–7pm | 61.1% | 4.4% | 226 |
| 7pm–8pm | 75.8% | 5.7% | 35 |
| 8pm–9pm | 58.0% | 2.0% | 147 |
| 9pm–10pm | 59.0% | 3.0% | 635 |
| 10pm–11pm | 49.6% | 2.9% | 520 |
| 11pm–12am | Limited data | 13 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DFW to ONT
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) | 62.6% | -10.4 pts | 0.0% | 91 |
| Christmas & New Year (Dec 20 - Jan 3) | 70.2% | -2.8 pts | 1.9% | 209 |
| Summer peak (Jun 15 - Aug 15) | 58.9% | -14.2 pts | 2.5% | 881 |
| All other days | 73.1% | — | 2.4% | 3,492 |
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).