| San Marino to Opole | 5,996.01 mi (9,649.64 km) |
| San Marino to Orzesze | 6,045.85 mi (9,729.85 km) |
| San Marino to Osowa | 5,796.15 mi (9,328.01 km) |
| San Marino to Ostroda | 5,871.85 mi (9,449.82 km) |
| San Marino to Ostroleka | 5,944.51 mi (9,566.76 km) |
| San Marino to Ostrow Mazowiecka | 5,967.50 mi (9,603.77 km) |
| San Marino to Ostrow Wielkopolski | 5,937.60 mi (9,555.64 km) |
| San Marino to Ostrowiec Swietokrzyski | 6,065.01 mi (9,760.69 km) |
| San Marino to Ostrzeszow | 5,953.63 mi (9,581.45 km) |
| San Marino to Oswiecim | 6,064.02 mi (9,759.09 km) |
| San Marino to Otwock | 5,993.04 mi (9,644.87 km) |
| San Marino to Ozarow Mazowiecki | 5,976.51 mi (9,618.26 km) |
| San Marino to Ozimek | 6,002.68 mi (9,660.37 km) |
| San Marino to Ozorkow | 5,955.27 mi (9,584.07 km) |
| San Marino to Pabianice | 5,975.78 mi (9,617.08 km) |
