| Porthcawl to Nyon | 570.92 mi (918.80 km) |
| Porthcawl to Oberriet | 660.58 mi (1,063.10 km) |
| Porthcawl to Obersiggenthal | 603.48 mi (971.21 km) |
| Porthcawl to Oberwil | 573.36 mi (922.74 km) |
| Porthcawl to Oberwingert | 621.45 mi (1,000.13 km) |
| Porthcawl to Oftringen | 594.96 mi (957.50 km) |
| Porthcawl to Olten | 593.05 mi (954.43 km) |
| Porthcawl to Onex | 575.53 mi (926.22 km) |
| Porthcawl to Opfikon | 616.35 mi (991.92 km) |
| Porthcawl to Ostermundigen | 592.60 mi (953.70 km) |
| Porthcawl to Payerne | 577.33 mi (929.12 km) |
| Porthcawl to Pfaffikon | 627.39 mi (1,009.69 km) |
| Porthcawl to Plan-les-Ouates | 576.89 mi (928.42 km) |
| Porthcawl to Pratteln | 578.96 mi (931.75 km) |
| Porthcawl to Prilly | 577.34 mi (929.13 km) |
