| Boston to Octeville | 241.62 mi (388.86 km) |
| Boston to Oignies | 215.84 mi (347.36 km) |
| Boston to Oissel | 255.54 mi (411.25 km) |
| Boston to Olivet | 363.04 mi (584.25 km) |
| Boston to Ollioules | 730.95 mi (1,176.35 km) |
| Boston to Olonne-sur-Mer | 451.60 mi (726.77 km) |
| Boston to Oloron-Sainte-Marie | 676.25 mi (1,088.32 km) |
| Boston to Onet Village | 606.52 mi (976.11 km) |
| Boston to Onnaing | 236.53 mi (380.65 km) |
| Boston to Orange | 648.86 mi (1,044.24 km) |
| Boston to Orchies | 222.11 mi (357.45 km) |
| Boston to Orleans | 360.52 mi (580.20 km) |
| Boston to Orly | 310.61 mi (499.88 km) |
| Boston to Ormesson-sur-Marne | 310.09 mi (499.05 km) |
| Boston to Orsay | 310.72 mi (500.06 km) |
