| San Marino to Owosso (Michigan) | 1,918.19 mi (3,087.03 km) |
| San Marino to Oxford (Alabama) | 1,842.65 mi (2,965.46 km) |
| San Marino to Oxford (Mississippi) | 1,627.01 mi (2,618.43 km) |
| San Marino to Oxford (Ohio) | 1,871.72 mi (3,012.24 km) |
| San Marino to Oxnard (California) | 61.29 mi (98.64 km) |
| San Marino to Oxon Hill (Maryland) | 2,289.54 mi (3,684.65 km) |
| San Marino to Ozark (Alabama) | 1,886.93 mi (3,036.72 km) |
| San Marino to Ozark (Missouri) | 1,409.39 mi (2,268.20 km) |
| San Marino to Pace (Florida) | 1,815.10 mi (2,921.12 km) |
| San Marino to Pacific Grove (California) | 275.44 mi (443.29 km) |
| San Marino to Pacifica (California) | 343.20 mi (552.33 km) |
| San Marino to Paducah (Kentucky) | 1,661.43 mi (2,673.81 km) |
| San Marino to Pahrump (Nevada) | 188.02 mi (302.58 km) |
| San Marino to Painesville (Ohio) | 2,059.46 mi (3,314.38 km) |
| San Marino to Palatine (Illinois) | 1,714.87 mi (2,759.82 km) |
