| Caerphilly to Orthez | 570.41 mi (917.98 km) |
| Caerphilly to Orvault | 306.03 mi (492.51 km) |
| Caerphilly to Osny | 290.67 mi (467.79 km) |
| Caerphilly to Ostwald | 527.36 mi (848.70 km) |
| Caerphilly to Ouistreham | 205.39 mi (330.54 km) |
| Caerphilly to Oullins | 545.58 mi (878.02 km) |
| Caerphilly to Outreau | 217.11 mi (349.41 km) |
| Caerphilly to Oyonnax | 544.77 mi (876.73 km) |
| Caerphilly to Ozoir-la-Ferriere | 324.69 mi (522.55 km) |
| Caerphilly to Pace | 245.56 mi (395.20 km) |
| Caerphilly to Palaiseau | 312.37 mi (502.72 km) |
| Caerphilly to Pamiers | 626.47 mi (1,008.21 km) |
| Caerphilly to Panazol | 446.85 mi (719.13 km) |
| Caerphilly to Pantin | 309.70 mi (498.41 km) |
| Caerphilly to Paray-le-Monial | 485.37 mi (781.13 km) |
