| Ciechanow to Olivenza | 1,640.17 mi (2,639.60 km) |
| Ciechanow to Olot | 1,117.52 mi (1,798.48 km) |
| Ciechanow to Onate | 1,256.13 mi (2,021.54 km) |
| Ciechanow to Onda | 1,327.39 mi (2,136.23 km) |
| Ciechanow to Onteniente | 1,399.52 mi (2,252.31 km) |
| Ciechanow to Orihuela | 1,450.72 mi (2,334.71 km) |
| Ciechanow to Osuna | 1,640.69 mi (2,640.44 km) |
| Ciechanow to Ourense | 1,499.73 mi (2,413.58 km) |
| Ciechanow to Oviedo | 1,375.67 mi (2,213.92 km) |
| Ciechanow to Paiporta | 1,360.83 mi (2,190.04 km) |
| Ciechanow to Pajara | 2,445.58 mi (3,935.78 km) |
| Ciechanow to Palafolls | 1,135.04 mi (1,826.68 km) |
| Ciechanow to Palafrugell | 1,108.16 mi (1,783.41 km) |
| Ciechanow to Palamos | 1,113.05 mi (1,791.28 km) |
| Ciechanow to Palencia | 1,383.52 mi (2,226.56 km) |
