| Chalkida to Oerlinghausen | 1,177.76 mi (1,895.42 km) |
| Chalkida to Oestrich-Winkel | 1,105.44 mi (1,779.04 km) |
| Chalkida to Offenburg | 1,042.60 mi (1,677.91 km) |
| Chalkida to Oftersheim | 1,057.47 mi (1,701.83 km) |
| Chalkida to Ohrdruf | 1,059.62 mi (1,705.30 km) |
| Chalkida to Ohringen | 1,018.48 mi (1,639.09 km) |
| Chalkida to Olbernhau | 980.86 mi (1,578.54 km) |
| Chalkida to Olching | 910.71 mi (1,465.65 km) |
| Chalkida to Oldenburg | 1,250.43 mi (2,012.37 km) |
| Chalkida to Oldenburg in Holstein | 1,246.45 mi (2,005.96 km) |
| Chalkida to Olfen | 1,204.44 mi (1,938.36 km) |
| Chalkida to Olpe | 1,157.34 mi (1,862.56 km) |
| Chalkida to Olsberg | 1,152.81 mi (1,855.27 km) |
| Chalkida to Oranienburg | 1,104.55 mi (1,777.60 km) |
| Chalkida to Ortenberg | 1,087.08 mi (1,749.48 km) |
