| Boom to Oignies | 73.48 mi (118.25 km) |
| Boom to Oissel | 188.25 mi (302.96 km) |
| Boom to Olivet | 248.44 mi (399.82 km) |
| Boom to Ollioules | 553.23 mi (890.34 km) |
| Boom to Olonne-sur-Mer | 420.13 mi (676.13 km) |
| Boom to Oloron-Sainte-Marie | 592.75 mi (953.93 km) |
| Boom to Onet Village | 471.37 mi (758.60 km) |
| Boom to Onnaing | 58.64 mi (94.37 km) |
| Boom to Orange | 480.29 mi (772.96 km) |
| Boom to Orchies | 64.60 mi (103.96 km) |
| Boom to Orleans | 245.86 mi (395.68 km) |
| Boom to Orly | 183.94 mi (296.02 km) |
| Boom to Ormesson-sur-Marne | 178.34 mi (287.01 km) |
| Boom to Orsay | 191.21 mi (307.72 km) |
| Boom to Orthez | 577.03 mi (928.64 km) |
