| Loudoun Valley Estates to Octeville | 3,660.01 mi (5,890.22 km) |
| Loudoun Valley Estates to Oignies | 3,832.69 mi (6,168.12 km) |
| Loudoun Valley Estates to Oissel | 3,782.03 mi (6,086.59 km) |
| Loudoun Valley Estates to Olivet | 3,854.22 mi (6,202.77 km) |
| Loudoun Valley Estates to Ollioules | 4,164.91 mi (6,702.77 km) |
| Loudoun Valley Estates to Olonne-sur-Mer | 3,728.36 mi (6,000.21 km) |
| Loudoun Valley Estates to Oloron-Sainte-Marie | 3,870.11 mi (6,228.33 km) |
| Loudoun Valley Estates to Onet Village | 3,981.84 mi (6,408.16 km) |
| Loudoun Valley Estates to Onnaing | 3,859.50 mi (6,211.26 km) |
| Loudoun Valley Estates to Orange | 4,087.55 mi (6,578.28 km) |
| Loudoun Valley Estates to Orchies | 3,842.80 mi (6,184.40 km) |
| Loudoun Valley Estates to Orleans | 3,853.56 mi (6,201.71 km) |
| Loudoun Valley Estates to Orly | 3,852.04 mi (6,199.27 km) |
| Loudoun Valley Estates to Ormesson-sur-Marne | 3,857.08 mi (6,207.38 km) |
| Loudoun Valley Estates to Orsay | 3,844.57 mi (6,187.24 km) |
