Best Time to Fly DAL to ONT: On-Time Stats by Hour & Airline
Dallas Love Field → Ontario International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 68.0% of Dallas (DAL) to Ontario (ONT) flights arrived on time (399 scheduled flights). That is 9.6 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
January has been the best month (85% on time) and Sunday the weakest day of the week (61%).
1.2% of flights were cancelled, versus 1.8% nationally.
DAL 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 |
|---|---|---|---|---|
| Southwest Airlines | 68.0% | 55 min | 1.2% | 399 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DAL to ONT
On-time arrival % by scheduled departure hour (local time), 787 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 9 | |
| 8am–9am | Limited data | 14 | |
| 9am–10am | 87.1% | 0.0% | 31 |
| 10am–11am | Limited data | 9 | |
| 11am–12pm | Limited data | 4 | |
| 12pm–1pm | 63.4% | 2.4% | 42 |
| 1pm–2pm | 81.0% | 1.7% | 59 |
| 2pm–3pm | 77.8% | 2.2% | 46 |
| 3pm–4pm | 71.0% | 0.0% | 31 |
| 4pm–5pm | 73.8% | 0.0% | 65 |
| 5pm–6pm | 81.9% | 0.0% | 118 |
| 6pm–7pm | 61.6% | 1.3% | 153 |
| 7pm–8pm | 63.1% | 0.7% | 150 |
| 8pm–9pm | 56.2% | 0.0% | 32 |
| 9pm–10pm | Limited data | 24 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DAL 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) | Limited data | 19 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 65.8% | -5.1 pts | 0.0% | 41 |
| Summer peak (Jun 15 - Aug 15) | 67.2% | -3.8 pts | 0.7% | 135 |
| All other days | 70.9% | — | 0.8% | 592 |
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).