| Reston to Octeville | 3,654.45 mi (5,881.26 km) |
| Reston to Oignies | 3,827.40 mi (6,159.60 km) |
| Reston to Oissel | 3,776.51 mi (6,077.71 km) |
| Reston to Olivet | 3,848.54 mi (6,193.62 km) |
| Reston to Ollioules | 4,158.80 mi (6,692.95 km) |
| Reston to Olonne-sur-Mer | 3,722.37 mi (5,990.58 km) |
| Reston to Oloron-Sainte-Marie | 3,863.75 mi (6,218.11 km) |
| Reston to Onet Village | 3,975.75 mi (6,398.35 km) |
| Reston to Onnaing | 3,854.21 mi (6,202.75 km) |
| Reston to Orange | 4,081.52 mi (6,568.57 km) |
| Reston to Orchies | 3,837.52 mi (6,175.89 km) |
| Reston to Orleans | 3,847.88 mi (6,192.57 km) |
| Reston to Orly | 3,846.49 mi (6,190.33 km) |
| Reston to Ormesson-sur-Marne | 3,851.54 mi (6,198.46 km) |
| Reston to Orsay | 3,839.01 mi (6,178.28 km) |
