| Ashburn to Oerlinghausen | 4,015.35 mi (6,462.08 km) |
| Ashburn to Oestrich-Winkel | 4,045.19 mi (6,510.11 km) |
| Ashburn to Offenburg | 4,087.57 mi (6,578.31 km) |
| Ashburn to Oftersheim | 4,087.33 mi (6,577.92 km) |
| Ashburn to Ohrdruf | 4,129.34 mi (6,645.54 km) |
| Ashburn to Ohringen | 4,129.60 mi (6,645.95 km) |
| Ashburn to Olbernhau | 4,235.81 mi (6,816.88 km) |
| Ashburn to Olching | 4,234.74 mi (6,815.15 km) |
| Ashburn to Oldenburg | 3,965.33 mi (6,381.58 km) |
| Ashburn to Oldenburg in Holstein | 4,033.21 mi (6,490.82 km) |
| Ashburn to Olfen | 3,972.17 mi (6,392.59 km) |
| Ashburn to Olpe | 4,009.44 mi (6,452.57 km) |
| Ashburn to Olsberg | 4,025.66 mi (6,478.67 km) |
| Ashburn to Oranienburg | 4,166.34 mi (6,705.07 km) |
| Ashburn to Ortenberg | 4,077.11 mi (6,561.48 km) |
