| Sinop to Nyon | 1,454.96 mi (2,341.53 km) |
| Sinop to Oberriet | 1,302.48 mi (2,096.14 km) |
| Sinop to Obersiggenthal | 1,363.02 mi (2,193.57 km) |
| Sinop to Oberwil | 1,397.46 mi (2,248.99 km) |
| Sinop to Oberwingert | 1,341.13 mi (2,158.35 km) |
| Sinop to Oftringen | 1,379.32 mi (2,219.80 km) |
| Sinop to Olten | 1,380.31 mi (2,221.40 km) |
| Sinop to Onex | 1,461.05 mi (2,351.34 km) |
| Sinop to Opfikon | 1,349.87 mi (2,172.41 km) |
| Sinop to Ostermundigen | 1,397.32 mi (2,248.76 km) |
| Sinop to Payerne | 1,422.94 mi (2,289.99 km) |
| Sinop to Pfaffikon | 1,339.30 mi (2,155.40 km) |
| Sinop to Plan-les-Ouates | 1,460.24 mi (2,350.03 km) |
| Sinop to Pratteln | 1,390.73 mi (2,238.16 km) |
| Sinop to Prilly | 1,437.83 mi (2,313.96 km) |
