| Trecastagni to Olivenza | 1,204.67 mi (1,938.72 km) |
| Trecastagni to Olot | 737.36 mi (1,186.66 km) |
| Trecastagni to Onate | 992.50 mi (1,597.27 km) |
| Trecastagni to Onda | 841.14 mi (1,353.69 km) |
| Trecastagni to Onteniente | 854.73 mi (1,375.55 km) |
| Trecastagni to Orihuela | 874.07 mi (1,406.68 km) |
| Trecastagni to Osuna | 1,105.65 mi (1,779.37 km) |
| Trecastagni to Ourense | 1,253.65 mi (2,017.55 km) |
| Trecastagni to Oviedo | 1,165.32 mi (1,875.40 km) |
| Trecastagni to Paiporta | 846.17 mi (1,361.77 km) |
| Trecastagni to Pajara | 1,799.43 mi (2,895.90 km) |
| Trecastagni to Palafolls | 712.54 mi (1,146.72 km) |
| Trecastagni to Palafrugell | 698.50 mi (1,124.12 km) |
| Trecastagni to Palamos | 698.37 mi (1,123.91 km) |
| Trecastagni to Palencia | 1,081.77 mi (1,740.94 km) |
