Best Time to Fly ONT to DAL: On-Time Stats by Hour & Airline
Ontario International → Dallas Love Field
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 74.2% of Ontario (ONT) to Dallas (DAL) flights arrived on time (399 scheduled flights). That is 3.4 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
July has been the best month (89% on time) and Monday the weakest day of the week (69%).
1.5% of flights were cancelled, versus 1.8% nationally.
ONT to DAL 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 | 74.2% | 44 min | 1.5% | 399 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ONT to DAL
On-time arrival % by scheduled departure hour (local time), 787 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 97.6% | 0.0% | 41 |
| 6am–7am | 93.9% | 0.6% | 168 |
| 7am–8am | 90.5% | 2.3% | 87 |
| 8am–9am | 88.1% | 1.7% | 60 |
| 9am–10am | 82.1% | 0.0% | 56 |
| 10am–11am | 81.0% | 0.0% | 42 |
| 11am–12pm | 52.5% | 0.0% | 160 |
| 12pm–1pm | Limited data | 25 | |
| 1pm–2pm | 68.9% | 0.0% | 47 |
| 2pm–3pm | Limited data | 18 | |
| 3pm–4pm | Limited data | 16 | |
| 4pm–5pm | 59.1% | 2.2% | 45 |
| 5pm–6pm | Limited data | 22 | |
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 DAL
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) | 87.5% | +10.8 pts | 0.0% | 41 |
| Summer peak (Jun 15 - Aug 15) | 82.2% | +5.5 pts | 0.0% | 135 |
| All other days | 76.7% | — | 1.4% | 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).