| Mesolongi to Oerlinghausen | 1,122.91 mi (1,807.15 km) |
| Mesolongi to Oestrich-Winkel | 1,040.00 mi (1,673.71 km) |
| Mesolongi to Offenburg | 969.54 mi (1,560.33 km) |
| Mesolongi to Oftersheim | 990.68 mi (1,594.35 km) |
| Mesolongi to Ohrdruf | 1,006.57 mi (1,619.92 km) |
| Mesolongi to Ohringen | 953.64 mi (1,534.73 km) |
| Mesolongi to Olbernhau | 937.26 mi (1,508.37 km) |
| Mesolongi to Olching | 846.97 mi (1,363.07 km) |
| Mesolongi to Oldenburg | 1,198.98 mi (1,929.57 km) |
| Mesolongi to Oldenburg in Holstein | 1,207.14 mi (1,942.71 km) |
| Mesolongi to Olfen | 1,144.94 mi (1,842.60 km) |
| Mesolongi to Olpe | 1,096.04 mi (1,763.91 km) |
| Mesolongi to Olsberg | 1,094.82 mi (1,761.94 km) |
| Mesolongi to Oranienburg | 1,068.33 mi (1,719.31 km) |
| Mesolongi to Ortenberg | 1,026.37 mi (1,651.78 km) |
