| Rhondda to Montalegre | 707.30 mi (1,138.29 km) |
| Rhondda to Montemor-o-Novo | 925.38 mi (1,489.25 km) |
| Rhondda to Montemor-o-Velho | 830.05 mi (1,335.84 km) |
| Rhondda to Montijo | 931.97 mi (1,499.85 km) |
| Rhondda to Mortagua | 805.99 mi (1,297.12 km) |
| Rhondda to Moura | 951.87 mi (1,531.89 km) |
| Rhondda to Murtosa | 791.73 mi (1,274.16 km) |
| Rhondda to Nazare | 873.30 mi (1,405.45 km) |
| Rhondda to Nelas | 795.39 mi (1,280.06 km) |
| Rhondda to Obidos | 890.71 mi (1,433.46 km) |
| Rhondda to Odemira | 1,002.28 mi (1,613.02 km) |
| Rhondda to Odivelas | 928.77 mi (1,494.71 km) |
| Rhondda to Oeiras | 937.88 mi (1,509.37 km) |
| Rhondda to Olhao | 1,031.02 mi (1,659.26 km) |
| Rhondda to Oliveira de Azemeis | 782.32 mi (1,259.02 km) |
