| Saint-Gilles to Oegstgeest | 587.68 mi (945.77 km) |
| Saint-Gilles to Oirschot | 541.97 mi (872.21 km) |
| Saint-Gilles to Oisterwijk | 547.38 mi (880.92 km) |
| Saint-Gilles to Oldebroek | 609.85 mi (981.46 km) |
| Saint-Gilles to Oldenzaal | 607.90 mi (978.32 km) |
| Saint-Gilles to Ommen | 617.48 mi (993.74 km) |
| Saint-Gilles to Oosterend | 648.67 mi (1,043.93 km) |
| Saint-Gilles to Oosterhout | 550.70 mi (886.27 km) |
| Saint-Gilles to Oosterwolde | 649.02 mi (1,044.50 km) |
| Saint-Gilles to Oostzaan | 605.30 mi (974.14 km) |
| Saint-Gilles to Opmeer | 623.83 mi (1,003.95 km) |
| Saint-Gilles to Oss | 561.14 mi (903.07 km) |
| Saint-Gilles to Oud-Beijerland | 562.35 mi (905.01 km) |
| Saint-Gilles to Oudenbosch | 546.64 mi (879.73 km) |
| Saint-Gilles to Oudewater | 576.51 mi (927.81 km) |
