| Frederick to Olivares | 3,754.49 mi (6,042.26 km) |
| Frederick to Olivenza | 3,670.33 mi (5,906.82 km) |
| Frederick to Olot | 4,021.69 mi (6,472.28 km) |
| Frederick to Onate | 3,770.90 mi (6,068.68 km) |
| Frederick to Onda | 3,961.94 mi (6,376.12 km) |
| Frederick to Onteniente | 3,981.12 mi (6,407.00 km) |
| Frederick to Orihuela | 3,988.05 mi (6,418.15 km) |
| Frederick to Osuna | 3,811.88 mi (6,134.63 km) |
| Frederick to Ourense | 3,534.26 mi (5,687.85 km) |
| Frederick to Oviedo | 3,602.97 mi (5,798.43 km) |
| Frederick to Paiporta | 3,971.19 mi (6,391.02 km) |
| Frederick to Pajara | 3,636.75 mi (5,852.78 km) |
| Frederick to Palafolls | 4,049.65 mi (6,517.27 km) |
| Frederick to Palafrugell | 4,060.81 mi (6,535.24 km) |
| Frederick to Palamos | 4,061.49 mi (6,536.33 km) |
