| Caldicot to Opole | 896.07 mi (1,442.09 km) |
| Caldicot to Orzesze | 939.26 mi (1,511.60 km) |
| Caldicot to Osowa | 899.97 mi (1,448.36 km) |
| Caldicot to Ostroda | 959.14 mi (1,543.59 km) |
| Caldicot to Ostroleka | 1,026.79 mi (1,652.45 km) |
| Caldicot to Ostrow Mazowiecka | 1,042.13 mi (1,677.14 km) |
| Caldicot to Ostrow Wielkopolski | 879.31 mi (1,415.12 km) |
| Caldicot to Ostrowiec Swietokrzyski | 1,040.34 mi (1,674.26 km) |
| Caldicot to Ostrzeszow | 886.62 mi (1,426.88 km) |
| Caldicot to Oswiecim | 961.43 mi (1,547.27 km) |
| Caldicot to Otwock | 1,020.88 mi (1,642.95 km) |
| Caldicot to Ozarow Mazowiecki | 1,000.39 mi (1,609.98 km) |
| Caldicot to Ozimek | 907.96 mi (1,461.22 km) |
| Caldicot to Ozorkow | 938.59 mi (1,510.52 km) |
| Caldicot to Pabianice | 945.80 mi (1,522.12 km) |
