| South River to Olympia (Washington) | 2,424.20 mi (3,901.37 km) |
| South River to Olympia Heights (Florida) | 1,073.38 mi (1,727.44 km) |
| South River to Omaha (Nebraska) | 1,131.20 mi (1,820.48 km) |
| South River to On Top of the World Designated Place (Florida) | 901.99 mi (1,451.61 km) |
| South River to Onalaska (Wisconsin) | 892.29 mi (1,436.00 km) |
| South River to Oneida (New York) | 193.47 mi (311.36 km) |
| South River to Oneonta (New York) | 143.35 mi (230.70 km) |
| South River to Ontario (California) | 2,394.19 mi (3,853.08 km) |
| South River to Ontario (Oregon) | 2,168.73 mi (3,490.23 km) |
| South River to Opa-locka (Florida) | 1,060.25 mi (1,706.30 km) |
| South River to Opelika (Alabama) | 812.40 mi (1,307.44 km) |
| South River to Opelousas (Louisiana) | 1,205.35 mi (1,939.82 km) |
| South River to Orange (California) | 2,412.04 mi (3,881.81 km) |
| South River to Orange (Texas) | 1,300.70 mi (2,093.28 km) |
| South River to Orange City (Florida) | 886.17 mi (1,426.15 km) |
