| Rhondda to Nyon | 566.72 mi (912.04 km) |
| Rhondda to Oberriet | 653.08 mi (1,051.03 km) |
| Rhondda to Obersiggenthal | 596.43 mi (959.86 km) |
| Rhondda to Oberwil | 566.70 mi (912.01 km) |
| Rhondda to Oberwingert | 614.10 mi (988.30 km) |
| Rhondda to Oftringen | 588.35 mi (946.85 km) |
| Rhondda to Olten | 586.40 mi (943.72 km) |
| Rhondda to Onex | 571.69 mi (920.05 km) |
| Rhondda to Opfikon | 609.22 mi (980.44 km) |
| Rhondda to Ostermundigen | 586.73 mi (944.25 km) |
| Rhondda to Payerne | 572.02 mi (920.57 km) |
| Rhondda to Pfaffikon | 620.23 mi (998.16 km) |
| Rhondda to Plan-les-Ouates | 573.07 mi (922.26 km) |
| Rhondda to Pratteln | 572.21 mi (920.88 km) |
| Rhondda to Prilly | 572.65 mi (921.59 km) |
