| Swansea to Opole | 4,889.06 mi (7,868.18 km) |
| Swansea to Orzesze | 4,939.41 mi (7,949.21 km) |
| Swansea to Osowa | 4,748.33 mi (7,641.69 km) |
| Swansea to Ostroda | 4,827.05 mi (7,768.39 km) |
| Swansea to Ostroleka | 4,905.82 mi (7,895.15 km) |
| Swansea to Ostrow Mazowiecka | 4,928.28 mi (7,931.30 km) |
| Swansea to Ostrow Wielkopolski | 4,843.43 mi (7,794.75 km) |
| Swansea to Ostrowiec Swietokrzyski | 4,994.99 mi (8,038.66 km) |
| Swansea to Ostrzeszow | 4,857.24 mi (7,816.97 km) |
| Swansea to Oswiecim | 4,960.54 mi (7,983.21 km) |
| Swansea to Otwock | 4,938.09 mi (7,947.09 km) |
| Swansea to Ozarow Mazowiecki | 4,918.45 mi (7,915.48 km) |
| Swansea to Ozimek | 4,898.43 mi (7,883.26 km) |
| Swansea to Ozorkow | 4,879.25 mi (7,852.39 km) |
| Swansea to Pabianice | 4,896.23 mi (7,879.72 km) |
