| Backnang to Olivenza | 1,082.94 mi (1,742.82 km) |
| Backnang to Olot | 574.95 mi (925.29 km) |
| Backnang to Onate | 698.97 mi (1,124.89 km) |
| Backnang to Onda | 782.19 mi (1,258.81 km) |
| Backnang to Onteniente | 858.15 mi (1,381.06 km) |
| Backnang to Orihuela | 911.11 mi (1,466.29 km) |
| Backnang to Osuna | 1,088.28 mi (1,751.43 km) |
| Backnang to Ourense | 948.98 mi (1,527.24 km) |
| Backnang to Oviedo | 824.68 mi (1,327.19 km) |
| Backnang to Paiporta | 817.46 mi (1,315.58 km) |
| Backnang to Pajara | 1,891.40 mi (3,043.91 km) |
| Backnang to Palafolls | 597.95 mi (962.31 km) |
| Backnang to Palafrugell | 572.44 mi (921.26 km) |
| Backnang to Palamos | 577.61 mi (929.57 km) |
| Backnang to Palencia | 826.69 mi (1,330.42 km) |
