| Sint-Gillis-Waas to Oestrich-Winkel | 189.86 mi (305.55 km) |
| Sint-Gillis-Waas to Offenburg | 254.93 mi (410.27 km) |
| Sint-Gillis-Waas to Oftersheim | 234.81 mi (377.89 km) |
| Sint-Gillis-Waas to Ohrdruf | 288.69 mi (464.61 km) |
| Sint-Gillis-Waas to Ohringen | 275.73 mi (443.74 km) |
| Sint-Gillis-Waas to Olbernhau | 402.78 mi (648.22 km) |
| Sint-Gillis-Waas to Olching | 383.06 mi (616.48 km) |
| Sint-Gillis-Waas to Oldenburg | 218.72 mi (351.99 km) |
| Sint-Gillis-Waas to Oldenburg in Holstein | 353.92 mi (569.58 km) |
| Sint-Gillis-Waas to Olfen | 144.77 mi (232.99 km) |
| Sint-Gillis-Waas to Olpe | 161.77 mi (260.35 km) |
| Sint-Gillis-Waas to Olsberg | 188.90 mi (304.01 km) |
| Sint-Gillis-Waas to Oranienburg | 402.05 mi (647.04 km) |
| Sint-Gillis-Waas to Ortenberg | 223.73 mi (360.06 km) |
| Sint-Gillis-Waas to Oschatz | 388.54 mi (625.30 km) |
