| Pikesville to Olivares | 3,720.42 mi (5,987.43 km) |
| Pikesville to Olivenza | 3,636.57 mi (5,852.50 km) |
| Pikesville to Olot | 3,990.59 mi (6,422.23 km) |
| Pikesville to Onate | 3,739.45 mi (6,018.07 km) |
| Pikesville to Onda | 3,929.56 mi (6,324.02 km) |
| Pikesville to Onteniente | 3,948.28 mi (6,354.15 km) |
| Pikesville to Orihuela | 3,954.90 mi (6,364.80 km) |
| Pikesville to Osuna | 3,777.88 mi (6,079.91 km) |
| Pikesville to Ourense | 3,501.82 mi (5,635.64 km) |
| Pikesville to Oviedo | 3,571.22 mi (5,747.32 km) |
| Pikesville to Paiporta | 3,938.60 mi (6,338.56 km) |
| Pikesville to Pajara | 3,599.56 mi (5,792.93 km) |
| Pikesville to Palafolls | 4,018.38 mi (6,466.95 km) |
| Pikesville to Palafrugell | 4,029.70 mi (6,485.17 km) |
| Pikesville to Palamos | 4,030.34 mi (6,486.21 km) |
