| Ano Syros to Oerlinghausen | 1,275.10 mi (2,052.08 km) |
| Ano Syros to Oestrich-Winkel | 1,204.49 mi (1,938.44 km) |
| Ano Syros to Offenburg | 1,142.26 mi (1,838.29 km) |
| Ano Syros to Oftersheim | 1,156.68 mi (1,861.50 km) |
| Ano Syros to Ohrdruf | 1,156.74 mi (1,861.60 km) |
| Ano Syros to Ohringen | 1,117.51 mi (1,798.46 km) |
| Ano Syros to Olbernhau | 1,075.93 mi (1,731.54 km) |
| Ano Syros to Olching | 1,009.69 mi (1,624.95 km) |
| Ano Syros to Oldenburg | 1,346.98 mi (2,167.76 km) |
| Ano Syros to Oldenburg in Holstein | 1,339.81 mi (2,156.21 km) |
| Ano Syros to Olfen | 1,302.61 mi (2,096.34 km) |
| Ano Syros to Olpe | 1,255.82 mi (2,021.04 km) |
| Ano Syros to Olsberg | 1,250.76 mi (2,012.90 km) |
| Ano Syros to Oranienburg | 1,197.23 mi (1,926.76 km) |
| Ano Syros to Ortenberg | 1,185.52 mi (1,907.91 km) |
