| Mesolongi to Orzesze | 824.54 mi (1,326.97 km) |
| Mesolongi to Osowa | 1,118.16 mi (1,799.50 km) |
| Mesolongi to Ostroda | 1,061.51 mi (1,708.34 km) |
| Mesolongi to Ostroleka | 1,015.52 mi (1,634.32 km) |
| Mesolongi to Ostrow Mazowiecka | 997.33 mi (1,605.04 km) |
| Mesolongi to Ostrow Wielkopolski | 934.08 mi (1,503.25 km) |
| Mesolongi to Ostrowiec Swietokrzyski | 868.10 mi (1,397.07 km) |
| Mesolongi to Ostrzeszow | 917.30 mi (1,476.25 km) |
| Mesolongi to Oswiecim | 813.52 mi (1,309.23 km) |
| Mesolongi to Otwock | 949.89 mi (1,528.70 km) |
| Mesolongi to Ozarow Mazowiecki | 957.25 mi (1,540.54 km) |
| Mesolongi to Ozimek | 864.52 mi (1,391.31 km) |
| Mesolongi to Ozorkow | 945.18 mi (1,521.11 km) |
| Mesolongi to Pabianice | 922.94 mi (1,485.32 km) |
| Mesolongi to Parczew | 919.10 mi (1,479.16 km) |
