| Manassas to Octeville | 3,668.89 mi (5,904.51 km) |
| Manassas to Oignies | 3,842.07 mi (6,183.22 km) |
| Manassas to Oissel | 3,791.00 mi (6,101.02 km) |
| Manassas to Olivet | 3,862.86 mi (6,216.68 km) |
| Manassas to Ollioules | 4,172.67 mi (6,715.27 km) |
| Manassas to Olonne-sur-Mer | 3,736.38 mi (6,013.12 km) |
| Manassas to Oloron-Sainte-Marie | 3,877.31 mi (6,239.92 km) |
| Manassas to Onet Village | 3,989.63 mi (6,420.69 km) |
| Manassas to Onnaing | 3,868.90 mi (6,226.39 km) |
| Manassas to Orange | 4,095.47 mi (6,591.03 km) |
| Manassas to Orchies | 3,852.20 mi (6,199.52 km) |
| Manassas to Orleans | 3,862.22 mi (6,215.64 km) |
| Manassas to Orly | 3,860.95 mi (6,213.60 km) |
| Manassas to Ormesson-sur-Marne | 3,866.01 mi (6,221.74 km) |
| Manassas to Orsay | 3,853.45 mi (6,201.52 km) |
