| Fort Washington to Olivares | 3,752.69 mi (6,039.37 km) |
| Fort Washington to Olivenza | 3,669.50 mi (5,905.48 km) |
| Fort Washington to Olot | 4,027.85 mi (6,482.20 km) |
| Fort Washington to Onate | 3,776.25 mi (6,077.29 km) |
| Fort Washington to Onda | 3,964.93 mi (6,380.94 km) |
| Fort Washington to Onteniente | 3,982.87 mi (6,409.81 km) |
| Fort Washington to Orihuela | 3,988.95 mi (6,419.59 km) |
| Fort Washington to Osuna | 3,810.30 mi (6,132.09 km) |
| Fort Washington to Ourense | 3,537.12 mi (5,692.44 km) |
| Fort Washington to Oviedo | 3,607.58 mi (5,805.84 km) |
| Fort Washington to Paiporta | 3,973.61 mi (6,394.90 km) |
| Fort Washington to Pajara | 3,622.32 mi (5,829.56 km) |
| Fort Washington to Palafolls | 4,055.41 mi (6,526.54 km) |
| Fort Washington to Palafrugell | 4,066.95 mi (6,545.13 km) |
| Fort Washington to Palamos | 4,067.55 mi (6,546.09 km) |
