| Sinop to Olivares | 2,196.31 mi (3,534.62 km) |
| Sinop to Olivenza | 2,213.92 mi (3,562.97 km) |
| Sinop to Olot | 1,664.00 mi (2,677.95 km) |
| Sinop to Onate | 1,898.02 mi (3,054.57 km) |
| Sinop to Onda | 1,839.19 mi (2,959.88 km) |
| Sinop to Onteniente | 1,880.01 mi (3,025.59 km) |
| Sinop to Orihuela | 1,913.97 mi (3,080.24 km) |
| Sinop to Osuna | 2,147.29 mi (3,455.73 km) |
| Sinop to Ourense | 2,178.44 mi (3,505.86 km) |
| Sinop to Oviedo | 2,062.87 mi (3,319.87 km) |
| Sinop to Paiporta | 1,857.62 mi (2,989.56 km) |
| Sinop to Pajara | 2,893.12 mi (4,656.02 km) |
| Sinop to Palafolls | 1,657.74 mi (2,667.88 km) |
| Sinop to Palafrugell | 1,633.51 mi (2,628.88 km) |
| Sinop to Palamos | 1,636.20 mi (2,633.20 km) |
