| Castelsarrasin to Obernburg am Main | 550.98 mi (886.72 km) |
| Castelsarrasin to Obernkirchen | 676.89 mi (1,089.36 km) |
| Castelsarrasin to Oberschleissheim | 578.35 mi (930.76 km) |
| Castelsarrasin to Oberstdorf | 499.49 mi (803.86 km) |
| Castelsarrasin to Obertraubling | 625.55 mi (1,006.72 km) |
| Castelsarrasin to Obertshausen | 552.30 mi (888.83 km) |
| Castelsarrasin to Oberursel | 551.41 mi (887.41 km) |
| Castelsarrasin to Ochsenfurt | 573.33 mi (922.68 km) |
| Castelsarrasin to Ochsenhausen | 506.78 mi (815.58 km) |
| Castelsarrasin to Ochtrup | 629.57 mi (1,013.20 km) |
| Castelsarrasin to Odenthal | 558.19 mi (898.32 km) |
| Castelsarrasin to Oelde | 628.80 mi (1,011.96 km) |
| Castelsarrasin to Oelsnitz | 679.48 mi (1,093.52 km) |
| Castelsarrasin to Oer-Erkenschwick | 597.06 mi (960.88 km) |
| Castelsarrasin to Oerlinghausen | 648.91 mi (1,044.32 km) |
