| River Ridge to Olympia (Washington) | 2,100.97 mi (3,381.19 km) |
| River Ridge to Olympia Heights (Florida) | 670.52 mi (1,079.09 km) |
| River Ridge to Omaha (Nebraska) | 846.39 mi (1,362.13 km) |
| River Ridge to On Top of the World Designated Place (Florida) | 480.47 mi (773.24 km) |
| River Ridge to Onalaska (Wisconsin) | 963.92 mi (1,551.29 km) |
| River Ridge to Oneida (New York) | 1,210.83 mi (1,948.64 km) |
| River Ridge to Oneonta (New York) | 1,204.28 mi (1,938.09 km) |
| River Ridge to Ontario (California) | 1,624.24 mi (2,613.97 km) |
| River Ridge to Ontario (Oregon) | 1,755.14 mi (2,824.63 km) |
| River Ridge to Opa-locka (Florida) | 669.51 mi (1,077.47 km) |
| River Ridge to Opelika (Alabama) | 341.39 mi (549.41 km) |
| River Ridge to Opelousas (Louisiana) | 117.78 mi (189.55 km) |
| River Ridge to Orange (California) | 1,636.00 mi (2,632.88 km) |
| River Ridge to Orange (Texas) | 212.06 mi (341.27 km) |
| River Ridge to Orange City (Florida) | 541.92 mi (872.13 km) |
