| Llantrisant to Nottingham | 135.51 mi (218.09 km) |
| Llantrisant to Nuneaton | 105.66 mi (170.04 km) |
| Llantrisant to Oadby | 121.90 mi (196.18 km) |
| Llantrisant to Oakengates | 88.79 mi (142.89 km) |
| Llantrisant to Oakham | 136.54 mi (219.74 km) |
| Llantrisant to Oldbury | 88.12 mi (141.82 km) |
| Llantrisant to Oldham | 148.10 mi (238.35 km) |
| Llantrisant to Ollerton | 151.62 mi (244.00 km) |
| Llantrisant to Olton | 91.03 mi (146.50 km) |
| Llantrisant to Omagh | 265.94 mi (427.99 km) |
| Llantrisant to Ormesby | 226.85 mi (365.07 km) |
| Llantrisant to Ormskirk | 141.37 mi (227.52 km) |
| Llantrisant to Orpington | 149.98 mi (241.37 km) |
| Llantrisant to Ossett | 165.80 mi (266.83 km) |
| Llantrisant to Oswaldtwistle | 157.54 mi (253.54 km) |
