| Mesolongi to Navodari | 554.56 mi (892.49 km) |
| Mesolongi to Negresti-Oas | 664.01 mi (1,068.63 km) |
| Mesolongi to Nehoiu | 543.64 mi (874.91 km) |
| Mesolongi to Ocna Mures | 567.84 mi (913.85 km) |
| Mesolongi to Odobesti | 586.91 mi (944.54 km) |
| Mesolongi to Odorheiu Secuiesc | 583.30 mi (938.72 km) |
| Mesolongi to Oltenita | 478.65 mi (770.31 km) |
| Mesolongi to Onesti | 609.25 mi (980.49 km) |
| Mesolongi to Oradea | 601.84 mi (968.56 km) |
| Mesolongi to Orastie | 524.76 mi (844.51 km) |
| Mesolongi to Oravita | 461.12 mi (742.10 km) |
| Mesolongi to Orsova | 442.00 mi (711.33 km) |
| Mesolongi to Otelu Rosu | 496.25 mi (798.63 km) |
| Mesolongi to Otopeni | 489.85 mi (788.33 km) |
| Mesolongi to Ovidiu | 550.20 mi (885.46 km) |
