| Manassas to Olivares | 3,776.04 mi (6,076.96 km) |
| Manassas to Olivenza | 3,692.65 mi (5,942.74 km) |
| Manassas to Olot | 4,049.34 mi (6,516.78 km) |
| Manassas to Onate | 3,797.95 mi (6,112.21 km) |
| Manassas to Onda | 3,987.23 mi (6,416.82 km) |
| Manassas to Onteniente | 4,005.46 mi (6,446.17 km) |
| Manassas to Orihuela | 4,011.73 mi (6,456.26 km) |
| Manassas to Osuna | 3,833.61 mi (6,169.61 km) |
| Manassas to Ourense | 3,559.44 mi (5,728.36 km) |
| Manassas to Oviedo | 3,629.47 mi (5,841.06 km) |
| Manassas to Paiporta | 3,996.04 mi (6,431.00 km) |
| Manassas to Pajara | 3,647.57 mi (5,870.20 km) |
| Manassas to Palafolls | 4,077.00 mi (6,561.30 km) |
| Manassas to Palafrugell | 4,088.45 mi (6,579.72 km) |
| Manassas to Palamos | 4,089.07 mi (6,580.72 km) |
