| Caerfyrddin to Orthez | 601.04 mi (967.29 km) |
| Caerfyrddin to Orvault | 338.90 mi (545.41 km) |
| Caerfyrddin to Osny | 340.49 mi (547.97 km) |
| Caerfyrddin to Ostwald | 578.04 mi (930.27 km) |
| Caerfyrddin to Ouistreham | 251.74 mi (405.13 km) |
| Caerfyrddin to Oullins | 592.92 mi (954.21 km) |
| Caerfyrddin to Outreau | 267.45 mi (430.41 km) |
| Caerfyrddin to Oyonnax | 593.67 mi (955.43 km) |
| Caerfyrddin to Ozoir-la-Ferriere | 374.57 mi (602.81 km) |
| Caerfyrddin to Pace | 279.94 mi (450.52 km) |
| Caerfyrddin to Palaiseau | 361.75 mi (582.19 km) |
| Caerfyrddin to Pamiers | 663.70 mi (1,068.12 km) |
| Caerfyrddin to Panazol | 487.80 mi (785.04 km) |
| Caerfyrddin to Pantin | 359.54 mi (578.62 km) |
| Caerfyrddin to Paray-le-Monial | 532.99 mi (857.76 km) |
