| Fairfax to Oerlinghausen | 4,016.99 mi (6,464.72 km) |
| Fairfax to Oestrich-Winkel | 4,046.23 mi (6,511.78 km) |
| Fairfax to Offenburg | 4,088.17 mi (6,579.28 km) |
| Fairfax to Oftersheim | 4,088.24 mi (6,579.39 km) |
| Fairfax to Ohrdruf | 4,130.84 mi (6,647.94 km) |
| Fairfax to Ohringen | 4,130.54 mi (6,647.46 km) |
| Fairfax to Olbernhau | 4,237.48 mi (6,819.57 km) |
| Fairfax to Olching | 4,235.57 mi (6,816.49 km) |
| Fairfax to Oldenburg | 3,967.28 mi (6,384.72 km) |
| Fairfax to Oldenburg in Holstein | 4,035.68 mi (6,494.80 km) |
| Fairfax to Olfen | 3,973.65 mi (6,394.97 km) |
| Fairfax to Olpe | 4,010.75 mi (6,454.68 km) |
| Fairfax to Olsberg | 4,027.11 mi (6,481.02 km) |
| Fairfax to Oranienburg | 4,168.56 mi (6,708.66 km) |
| Fairfax to Ortenberg | 4,078.33 mi (6,563.45 km) |
