| Llantrisant to Opole | 923.13 mi (1,485.63 km) |
| Llantrisant to Orzesze | 966.27 mi (1,555.06 km) |
| Llantrisant to Osowa | 926.28 mi (1,490.71 km) |
| Llantrisant to Ostroda | 985.77 mi (1,586.44 km) |
| Llantrisant to Ostroleka | 1,053.60 mi (1,695.60 km) |
| Llantrisant to Ostrow Mazowiecka | 1,069.00 mi (1,720.39 km) |
| Llantrisant to Ostrow Wielkopolski | 906.39 mi (1,458.70 km) |
| Llantrisant to Ostrowiec Swietokrzyski | 1,067.43 mi (1,717.86 km) |
| Llantrisant to Ostrzeszow | 913.71 mi (1,470.48 km) |
| Llantrisant to Oswiecim | 988.43 mi (1,590.73 km) |
| Llantrisant to Otwock | 1,047.89 mi (1,686.41 km) |
| Llantrisant to Ozarow Mazowiecki | 1,027.39 mi (1,653.43 km) |
| Llantrisant to Ozimek | 935.02 mi (1,504.77 km) |
| Llantrisant to Ozorkow | 965.64 mi (1,554.05 km) |
| Llantrisant to Pabianice | 972.87 mi (1,565.69 km) |
