| Llantrisant to Noventa Vicentina | 806.69 mi (1,298.25 km) |
| Llantrisant to Novi di Modena | 799.64 mi (1,286.89 km) |
| Llantrisant to Novi Ligure | 729.02 mi (1,173.25 km) |
| Llantrisant to Nuoro | 984.24 mi (1,583.98 km) |
| Llantrisant to Occhiobello | 824.05 mi (1,326.18 km) |
| Llantrisant to Oderzo | 823.90 mi (1,325.93 km) |
| Llantrisant to Oggiono | 702.41 mi (1,130.41 km) |
| Llantrisant to Olbia | 955.08 mi (1,537.06 km) |
| Llantrisant to Oleggio | 684.12 mi (1,100.99 km) |
| Llantrisant to Olgiate Comasco | 688.14 mi (1,107.45 km) |
| Llantrisant to Olgiate Olona | 691.75 mi (1,113.27 km) |
| Llantrisant to Omegna | 663.30 mi (1,067.48 km) |
| Llantrisant to Opera | 715.26 mi (1,151.10 km) |
| Llantrisant to Oppeano | 792.57 mi (1,275.52 km) |
| Llantrisant to Orbassano | 673.74 mi (1,084.28 km) |
