| DeForest to Olivares | 4,214.93 mi (6,783.28 km) |
| DeForest to Olivenza | 4,123.23 mi (6,635.69 km) |
| DeForest to Olot | 4,403.05 mi (7,086.02 km) |
| DeForest to Onate | 4,164.00 mi (6,701.31 km) |
| DeForest to Onda | 4,375.48 mi (7,041.66 km) |
| DeForest to Onteniente | 4,406.37 mi (7,091.37 km) |
| DeForest to Orihuela | 4,421.22 mi (7,115.27 km) |
| DeForest to Osuna | 4,269.68 mi (6,871.39 km) |
| DeForest to Ourense | 3,955.07 mi (6,365.07 km) |
| DeForest to Oviedo | 4,005.89 mi (6,446.86 km) |
| DeForest to Paiporta | 4,390.23 mi (7,065.39 km) |
| DeForest to Pajara | 4,197.63 mi (6,755.43 km) |
| DeForest to Palafolls | 4,434.71 mi (7,136.97 km) |
| DeForest to Palafrugell | 4,441.79 mi (7,148.37 km) |
| DeForest to Palamos | 4,443.29 mi (7,150.78 km) |
