| Conwy to Olivares | 1,101.67 mi (1,772.97 km) |
| Conwy to Olivenza | 1,020.24 mi (1,641.91 km) |
| Conwy to Olot | 820.30 mi (1,320.15 km) |
| Conwy to Onate | 710.93 mi (1,144.13 km) |
| Conwy to Onda | 935.28 mi (1,505.18 km) |
| Conwy to Onteniente | 1,010.55 mi (1,626.33 km) |
| Conwy to Orihuela | 1,058.79 mi (1,703.96 km) |
| Conwy to Osuna | 1,110.39 mi (1,787.00 km) |
| Conwy to Ourense | 778.62 mi (1,253.08 km) |
| Conwy to Oviedo | 691.56 mi (1,112.95 km) |
| Conwy to Paiporta | 970.54 mi (1,561.93 km) |
| Conwy to Pajara | 1,800.04 mi (2,896.89 km) |
| Conwy to Palafolls | 858.19 mi (1,381.12 km) |
| Conwy to Palafrugell | 849.02 mi (1,366.36 km) |
| Conwy to Palamos | 853.07 mi (1,372.88 km) |
