| Lake Elsinore to Olympia Heights (Florida) | 2,274.42 mi (3,660.33 km) |
| Lake Elsinore to Omaha (Nebraska) | 1,274.61 mi (2,051.28 km) |
| Lake Elsinore to On Top of the World Designated Place (Florida) | 2,081.07 mi (3,349.16 km) |
| Lake Elsinore to Onalaska (Wisconsin) | 1,564.61 mi (2,518.00 km) |
| Lake Elsinore to Oneida (New York) | 2,322.42 mi (3,737.57 km) |
| Lake Elsinore to Oneonta (New York) | 2,351.62 mi (3,784.57 km) |
| Lake Elsinore to Ontario (California) | 29.05 mi (46.75 km) |
| Lake Elsinore to Ontario (Oregon) | 714.77 mi (1,150.30 km) |
| Lake Elsinore to Opa-locka (Florida) | 2,274.53 mi (3,660.51 km) |
| Lake Elsinore to Opelika (Alabama) | 1,842.17 mi (2,964.68 km) |
| Lake Elsinore to Opelousas (Louisiana) | 1,490.22 mi (2,398.28 km) |
| Lake Elsinore to Orange (California) | 29.19 mi (46.97 km) |
| Lake Elsinore to Orange (Texas) | 1,401.28 mi (2,255.14 km) |
| Lake Elsinore to Orange City (Florida) | 2,142.10 mi (3,447.38 km) |
| Lake Elsinore to Orangeburg (South Carolina) | 2,087.84 mi (3,360.06 km) |
