| Castelsarrasin to Oegstgeest | 583.44 mi (938.95 km) |
| Castelsarrasin to Oirschot | 550.76 mi (886.36 km) |
| Castelsarrasin to Oisterwijk | 554.49 mi (892.37 km) |
| Castelsarrasin to Oldebroek | 621.17 mi (999.68 km) |
| Castelsarrasin to Oldenzaal | 631.23 mi (1,015.87 km) |
| Castelsarrasin to Ommen | 634.11 mi (1,020.50 km) |
| Castelsarrasin to Oosterend | 659.20 mi (1,060.88 km) |
| Castelsarrasin to Oosterhout | 553.17 mi (890.24 km) |
| Castelsarrasin to Oosterwolde | 661.93 mi (1,065.28 km) |
| Castelsarrasin to Oostzaan | 605.18 mi (973.95 km) |
| Castelsarrasin to Opmeer | 623.57 mi (1,003.55 km) |
| Castelsarrasin to Oss | 571.34 mi (919.47 km) |
| Castelsarrasin to Oud-Beijerland | 558.38 mi (898.62 km) |
| Castelsarrasin to Oudenbosch | 545.00 mi (877.10 km) |
| Castelsarrasin to Oudewater | 577.67 mi (929.66 km) |
