| Ontario to Laredo (Texas) | 1,162.53 mi (1,870.92 km) |
| Ontario to Largo (Florida) | 2,096.19 mi (3,373.49 km) |
| Ontario to Largo (Maryland) | 2,271.55 mi (3,655.71 km) |
| Ontario to Larkspur (California) | 385.13 mi (619.80 km) |
| Ontario to Las Cruces (New Mexico) | 636.28 mi (1,024.00 km) |
| Ontario to Las Vegas (Nevada) | 201.17 mi (323.76 km) |
| Ontario to Las Vegas (New Mexico) | 710.29 mi (1,143.10 km) |
| Ontario to Latham (New York) | 2,421.11 mi (3,896.41 km) |
| Ontario to Lathrop (California) | 332.88 mi (535.71 km) |
| Ontario to Lauderdale Lakes (Florida) | 2,287.53 mi (3,681.43 km) |
| Ontario to Lauderhill (Florida) | 2,286.46 mi (3,679.70 km) |
| Ontario to Laurel (Florida) | 2,133.15 mi (3,432.97 km) |
| Ontario to Laurel (Maryland) | 2,268.67 mi (3,651.07 km) |
| Ontario to Laurel (Mississippi) | 1,654.32 mi (2,662.37 km) |
| Ontario to Laurel (Virginia) | 2,242.76 mi (3,609.37 km) |
