| Trier to Olivenza | 1,020.54 mi (1,642.40 km) |
| Trier to Olot | 559.82 mi (900.95 km) |
| Trier to Onate | 633.24 mi (1,019.09 km) |
| Trier to Onda | 755.74 mi (1,216.24 km) |
| Trier to Onteniente | 835.29 mi (1,344.28 km) |
| Trier to Orihuela | 889.34 mi (1,431.25 km) |
| Trier to Osuna | 1,043.73 mi (1,679.72 km) |
| Trier to Ourense | 861.68 mi (1,386.74 km) |
| Trier to Oviedo | 738.19 mi (1,188.01 km) |
| Trier to Paiporta | 792.85 mi (1,275.96 km) |
| Trier to Pajara | 1,837.79 mi (2,957.64 km) |
| Trier to Palafolls | 589.27 mi (948.33 km) |
| Trier to Palafrugell | 566.77 mi (912.12 km) |
| Trier to Palamos | 572.01 mi (920.56 km) |
| Trier to Palencia | 756.65 mi (1,217.71 km) |
