| River Falls to Olympia (Washington) | 1,452.81 mi (2,338.07 km) |
| River Falls to Olympia Heights (Florida) | 1,488.79 mi (2,395.97 km) |
| River Falls to Omaha (Nebraska) | 302.85 mi (487.39 km) |
| River Falls to On Top of the World Designated Place (Florida) | 1,226.65 mi (1,974.10 km) |
| River Falls to Onalaska (Wisconsin) | 97.03 mi (156.15 km) |
| River Falls to Oneida (New York) | 850.86 mi (1,369.33 km) |
| River Falls to Oneonta (New York) | 891.43 mi (1,434.62 km) |
| River Falls to Ontario (California) | 1,519.21 mi (2,444.92 km) |
| River Falls to Ontario (Oregon) | 1,198.10 mi (1,928.15 km) |
| River Falls to Opa-locka (Florida) | 1,479.89 mi (2,381.65 km) |
| River Falls to Opelika (Alabama) | 928.02 mi (1,493.50 km) |
| River Falls to Opelousas (Louisiana) | 990.94 mi (1,594.76 km) |
| River Falls to Orange (California) | 1,538.87 mi (2,476.57 km) |
| River Falls to Orange (Texas) | 1,020.19 mi (1,641.84 km) |
| River Falls to Orange City (Florida) | 1,263.30 mi (2,033.09 km) |
