| Loudoun Valley Estates to Orbetello | 4,426.69 mi (7,124.07 km) |
| Loudoun Valley Estates to Oria | 4,779.33 mi (7,691.58 km) |
| Loudoun Valley Estates to Oristano | 4,396.62 mi (7,075.67 km) |
| Loudoun Valley Estates to Orta Nova | 4,663.96 mi (7,505.93 km) |
| Loudoun Valley Estates to Orte | 4,477.52 mi (7,205.87 km) |
| Loudoun Valley Estates to Ortona | 4,569.26 mi (7,353.52 km) |
| Loudoun Valley Estates to Orvieto | 4,456.36 mi (7,171.82 km) |
| Loudoun Valley Estates to Orzinuovi | 4,271.25 mi (6,873.92 km) |
| Loudoun Valley Estates to Osimo | 4,488.89 mi (7,224.17 km) |
| Loudoun Valley Estates to Ospitaletto | 4,272.15 mi (6,875.36 km) |
| Loudoun Valley Estates to Ostuni | 4,768.14 mi (7,673.57 km) |
| Loudoun Valley Estates to Ottaviano | 4,627.77 mi (7,447.67 km) |
| Loudoun Valley Estates to Ovada | 4,240.53 mi (6,824.47 km) |
| Loudoun Valley Estates to Ozieri | 4,391.97 mi (7,068.19 km) |
| Loudoun Valley Estates to Paceco | 4,647.34 mi (7,479.18 km) |
