| Assen to Olivenza | 1,183.39 mi (1,904.48 km) |
| Assen to Olot | 770.89 mi (1,240.62 km) |
| Assen to Onate | 802.72 mi (1,291.85 km) |
| Assen to Onda | 956.56 mi (1,539.44 km) |
| Assen to Onteniente | 1,037.26 mi (1,669.30 km) |
| Assen to Orihuela | 1,091.29 mi (1,756.26 km) |
| Assen to Osuna | 1,225.35 mi (1,972.01 km) |
| Assen to Ourense | 993.14 mi (1,598.30 km) |
| Assen to Oviedo | 875.35 mi (1,408.74 km) |
| Assen to Paiporta | 994.28 mi (1,600.14 km) |
| Assen to Pajara | 2,002.31 mi (3,222.41 km) |
| Assen to Palafolls | 802.72 mi (1,291.85 km) |
| Assen to Palafrugell | 781.83 mi (1,258.24 km) |
| Assen to Palamos | 787.02 mi (1,266.58 km) |
| Assen to Palencia | 916.54 mi (1,475.02 km) |
