| San Marino to Oak Grove (South Carolina) | 2,104.42 mi (3,386.73 km) |
| San Marino to Oak Harbor (Washington) | 1,006.65 mi (1,620.04 km) |
| San Marino to Oak Hills (Oregon) | 827.44 mi (1,331.64 km) |
| San Marino to Oak Lawn (Illinois) | 1,725.63 mi (2,777.13 km) |
| San Marino to Oak Park (California) | 37.63 mi (60.55 km) |
| San Marino to Oak Park (Illinois) | 1,725.38 mi (2,776.73 km) |
| San Marino to Oak Park (Michigan) | 1,964.33 mi (3,161.28 km) |
| San Marino to Oak Ridge (Florida) | 2,189.43 mi (3,523.55 km) |
| San Marino to Oak Ridge (New Jersey) | 2,409.86 mi (3,878.29 km) |
| San Marino to Oak Ridge (Tennessee) | 1,907.78 mi (3,070.27 km) |
| San Marino to Oakdale (California) | 294.27 mi (473.57 km) |
| San Marino to Oakdale (Minnesota) | 1,526.52 mi (2,456.69 km) |
| San Marino to Oakland (California) | 341.82 mi (550.11 km) |
| San Marino to Oakland (New Jersey) | 2,423.20 mi (3,899.77 km) |
| San Marino to Oakland Park (Florida) | 2,319.35 mi (3,732.64 km) |
