| Porthcawl to Octeville | 156.41 mi (251.71 km) |
| Porthcawl to Oignies | 298.93 mi (481.08 km) |
| Porthcawl to Oissel | 257.11 mi (413.78 km) |
| Porthcawl to Olivet | 353.24 mi (568.49 km) |
| Porthcawl to Ollioules | 727.92 mi (1,171.47 km) |
| Porthcawl to Olonne-sur-Mer | 352.43 mi (567.19 km) |
| Porthcawl to Oloron-Sainte-Marie | 590.27 mi (949.95 km) |
| Porthcawl to Onet Village | 570.72 mi (918.48 km) |
| Porthcawl to Onnaing | 326.05 mi (524.72 km) |
| Porthcawl to Orange | 641.66 mi (1,032.65 km) |
| Porthcawl to Orchies | 309.42 mi (497.97 km) |
| Porthcawl to Orleans | 351.56 mi (565.78 km) |
| Porthcawl to Orly | 329.04 mi (529.54 km) |
| Porthcawl to Ormesson-sur-Marne | 332.60 mi (535.28 km) |
| Porthcawl to Orsay | 323.61 mi (520.81 km) |
