| Trikala to Oerlinghausen | 1,061.78 mi (1,708.78 km) |
| Trikala to Oestrich-Winkel | 985.47 mi (1,585.96 km) |
| Trikala to Offenburg | 920.54 mi (1,481.47 km) |
| Trikala to Oftersheim | 937.04 mi (1,508.02 km) |
| Trikala to Ohrdruf | 944.29 mi (1,519.68 km) |
| Trikala to Ohringen | 898.61 mi (1,446.18 km) |
| Trikala to Olbernhau | 869.94 mi (1,400.03 km) |
| Trikala to Olching | 791.06 mi (1,273.09 km) |
| Trikala to Oldenburg | 1,136.02 mi (1,828.25 km) |
| Trikala to Oldenburg in Holstein | 1,138.18 mi (1,831.73 km) |
| Trikala to Olfen | 1,086.62 mi (1,748.75 km) |
| Trikala to Olpe | 1,038.82 mi (1,671.81 km) |
| Trikala to Olsberg | 1,035.53 mi (1,666.52 km) |
| Trikala to Oranienburg | 997.86 mi (1,605.91 km) |
| Trikala to Ortenberg | 968.69 mi (1,558.96 km) |
