| Manassas to Nuth | 3,947.78 mi (6,353.34 km) |
| Manassas to Oegstgeest | 3,858.66 mi (6,209.92 km) |
| Manassas to Oirschot | 3,909.09 mi (6,291.07 km) |
| Manassas to Oisterwijk | 3,902.95 mi (6,281.19 km) |
| Manassas to Oldebroek | 3,908.27 mi (6,289.76 km) |
| Manassas to Oldenzaal | 3,952.10 mi (6,360.29 km) |
| Manassas to Ommen | 3,926.71 mi (6,319.43 km) |
| Manassas to Oosterend | 3,900.60 mi (6,277.40 km) |
| Manassas to Oosterhout | 3,887.75 mi (6,256.73 km) |
| Manassas to Oosterwolde | 3,909.63 mi (6,291.94 km) |
| Manassas to Oostzaan | 3,868.86 mi (6,226.32 km) |
| Manassas to Opmeer | 3,864.83 mi (6,219.84 km) |
| Manassas to Oss | 3,910.80 mi (6,293.82 km) |
| Manassas to Oud-Beijerland | 3,865.16 mi (6,220.38 km) |
| Manassas to Oudenbosch | 3,875.83 mi (6,237.55 km) |
