| Sint-Gillis-Waas to Oignies | 71.19 mi (114.57 km) |
| Sint-Gillis-Waas to Oissel | 186.04 mi (299.41 km) |
| Sint-Gillis-Waas to Olivet | 252.04 mi (405.61 km) |
| Sint-Gillis-Waas to Ollioules | 563.93 mi (907.55 km) |
| Sint-Gillis-Waas to Olonne-sur-Mer | 419.50 mi (675.12 km) |
| Sint-Gillis-Waas to Oloron-Sainte-Marie | 596.68 mi (960.27 km) |
| Sint-Gillis-Waas to Onet Village | 478.59 mi (770.21 km) |
| Sint-Gillis-Waas to Onnaing | 61.59 mi (99.11 km) |
| Sint-Gillis-Waas to Orange | 490.13 mi (788.78 km) |
| Sint-Gillis-Waas to Orchies | 63.85 mi (102.76 km) |
| Sint-Gillis-Waas to Orleans | 249.42 mi (401.41 km) |
| Sint-Gillis-Waas to Orly | 187.22 mi (301.31 km) |
| Sint-Gillis-Waas to Ormesson-sur-Marne | 181.99 mi (292.88 km) |
| Sint-Gillis-Waas to Orsay | 193.98 mi (312.19 km) |
| Sint-Gillis-Waas to Orthez | 580.62 mi (934.41 km) |
