| Naperville to Octeville | 3,976.20 mi (6,399.08 km) |
| Naperville to Oignies | 4,127.50 mi (6,642.57 km) |
| Naperville to Oissel | 4,093.16 mi (6,587.31 km) |
| Naperville to Olivet | 4,176.67 mi (6,721.71 km) |
| Naperville to Ollioules | 4,514.71 mi (7,265.72 km) |
| Naperville to Olonne-sur-Mer | 4,074.04 mi (6,556.54 km) |
| Naperville to Oloron-Sainte-Marie | 4,241.28 mi (6,825.68 km) |
| Naperville to Onet Village | 4,332.73 mi (6,972.86 km) |
| Naperville to Onnaing | 4,153.29 mi (6,684.07 km) |
| Naperville to Orange | 4,432.84 mi (7,133.96 km) |
| Naperville to Orchies | 4,136.82 mi (6,657.57 km) |
| Naperville to Orleans | 4,175.64 mi (6,720.04 km) |
| Naperville to Orly | 4,164.89 mi (6,702.75 km) |
| Naperville to Ormesson-sur-Marne | 4,169.10 mi (6,709.52 km) |
| Naperville to Orsay | 4,158.47 mi (6,692.41 km) |
