| Ontario to LaGrange (Georgia) | 1,869.09 mi (3,008.01 km) |
| Ontario to Laguna Beach (California) | 35.26 mi (56.74 km) |
| Ontario to Laguna Hills (California) | 31.37 mi (50.49 km) |
| Ontario to Laguna Niguel (California) | 35.81 mi (57.63 km) |
| Ontario to Laguna Woods (California) | 30.50 mi (49.09 km) |
| Ontario to Lahaina (Hawaii) | 2,542.49 mi (4,091.75 km) |
| Ontario to Lake Arbor (Maryland) | 2,271.31 mi (3,655.32 km) |
| Ontario to Lake Barcroft (Virginia) | 2,254.05 mi (3,627.55 km) |
| Ontario to Lake Butler (Florida) | 2,152.71 mi (3,464.45 km) |
| Ontario to Lake Charles (Louisiana) | 1,448.37 mi (2,330.92 km) |
| Ontario to Lake City (Florida) | 2,053.10 mi (3,304.15 km) |
| Ontario to Lake Elmo (Minnesota) | 1,509.83 mi (2,429.84 km) |
| Ontario to Lake Elsinore (California) | 29.05 mi (46.75 km) |
| Ontario to Lake Forest (California) | 26.44 mi (42.55 km) |
| Ontario to Lake Forest (Illinois) | 1,702.54 mi (2,739.98 km) |
