| Darby to Olivares | 3,635.64 mi (5,850.99 km) |
| Darby to Olivenza | 3,551.70 mi (5,715.90 km) |
| Darby to Olot | 3,905.86 mi (6,285.87 km) |
| Darby to Onate | 3,654.63 mi (5,881.56 km) |
| Darby to Onda | 3,844.58 mi (6,187.25 km) |
| Darby to Onteniente | 3,863.28 mi (6,217.35 km) |
| Darby to Orihuela | 3,869.92 mi (6,228.04 km) |
| Darby to Osuna | 3,693.08 mi (5,943.44 km) |
| Darby to Ourense | 3,416.83 mi (5,498.86 km) |
| Darby to Oviedo | 3,486.33 mi (5,610.70 km) |
| Darby to Paiporta | 3,853.60 mi (6,201.77 km) |
| Darby to Pajara | 3,518.81 mi (5,662.98 km) |
| Darby to Palafolls | 3,933.60 mi (6,330.51 km) |
| Darby to Palafrugell | 3,944.97 mi (6,348.81 km) |
| Darby to Palamos | 3,945.60 mi (6,349.83 km) |
