| Torre del Mar to Olympia Heights (Florida) | 4,452.60 mi (7,165.77 km) |
| Torre del Mar to Omaha (Nebraska) | 4,700.60 mi (7,564.89 km) |
| Torre del Mar to On Top of the World Designated Place (Florida) | 4,439.61 mi (7,144.86 km) |
| Torre del Mar to Onalaska (Wisconsin) | 4,397.45 mi (7,077.00 km) |
| Torre del Mar to Oneida (New York) | 3,701.78 mi (5,957.44 km) |
| Torre del Mar to Oneonta (New York) | 3,687.39 mi (5,934.29 km) |
| Torre del Mar to Ontario (California) | 5,940.67 mi (9,560.59 km) |
| Torre del Mar to Ontario (Oregon) | 5,454.11 mi (8,777.54 km) |
| Torre del Mar to Opa-locka (Florida) | 4,441.97 mi (7,148.67 km) |
| Torre del Mar to Opelika (Alabama) | 4,479.78 mi (7,209.50 km) |
| Torre del Mar to Opelousas (Louisiana) | 4,894.56 mi (7,877.04 km) |
| Torre del Mar to Orange (California) | 5,960.78 mi (9,592.95 km) |
| Torre del Mar to Orange (Texas) | 4,994.03 mi (8,037.11 km) |
| Torre del Mar to Orange City (Florida) | 4,392.82 mi (7,069.56 km) |
| Torre del Mar to Orangeburg (South Carolina) | 4,222.27 mi (6,795.09 km) |
