| Fairfax to Orbetello | 4,422.51 mi (7,117.35 km) |
| Fairfax to Oria | 4,775.38 mi (7,685.23 km) |
| Fairfax to Oristano | 4,391.62 mi (7,067.63 km) |
| Fairfax to Orta Nova | 4,659.99 mi (7,499.53 km) |
| Fairfax to Orte | 4,473.46 mi (7,199.33 km) |
| Fairfax to Ortona | 4,565.38 mi (7,347.26 km) |
| Fairfax to Orvieto | 4,452.33 mi (7,165.33 km) |
| Fairfax to Orzinuovi | 4,267.64 mi (6,868.10 km) |
| Fairfax to Osimo | 4,485.17 mi (7,218.18 km) |
| Fairfax to Ospitaletto | 4,268.59 mi (6,869.63 km) |
| Fairfax to Ostuni | 4,764.23 mi (7,667.29 km) |
| Fairfax to Ottaviano | 4,623.56 mi (7,440.91 km) |
| Fairfax to Ovada | 4,236.62 mi (6,818.18 km) |
| Fairfax to Ozieri | 4,387.16 mi (7,060.46 km) |
| Fairfax to Paceco | 4,642.34 mi (7,471.12 km) |
