| Spanish Lake to Olympia (Washington) | 1,734.73 mi (2,791.78 km) |
| Spanish Lake to Olympia Heights (Florida) | 1,069.54 mi (1,721.25 km) |
| Spanish Lake to Omaha (Nebraska) | 353.25 mi (568.51 km) |
| Spanish Lake to On Top of the World Designated Place (Florida) | 807.73 mi (1,299.92 km) |
| Spanish Lake to Onalaska (Wisconsin) | 356.16 mi (573.18 km) |
| Spanish Lake to Oneida (New York) | 813.67 mi (1,309.47 km) |
| Spanish Lake to Oneonta (New York) | 832.14 mi (1,339.19 km) |
| Spanish Lake to Ontario (California) | 1,552.18 mi (2,498.00 km) |
| Spanish Lake to Ontario (Oregon) | 1,426.65 mi (2,295.97 km) |
| Spanish Lake to Opa-locka (Florida) | 1,061.68 mi (1,708.61 km) |
| Spanish Lake to Opelika (Alabama) | 502.45 mi (808.61 km) |
| Spanish Lake to Opelousas (Louisiana) | 580.74 mi (934.61 km) |
| Spanish Lake to Orange (California) | 1,569.43 mi (2,525.76 km) |
| Spanish Lake to Orange (Texas) | 631.89 mi (1,016.92 km) |
| Spanish Lake to Orange City (Florida) | 850.72 mi (1,369.10 km) |
