| Montesilvano to Olivenza | 1,142.45 mi (1,838.59 km) |
| Montesilvano to Olot | 595.40 mi (958.21 km) |
| Montesilvano to Onate | 839.59 mi (1,351.19 km) |
| Montesilvano to Onda | 768.30 mi (1,236.46 km) |
| Montesilvano to Onteniente | 813.06 mi (1,308.49 km) |
| Montesilvano to Orihuela | 850.84 mi (1,369.29 km) |
| Montesilvano to Osuna | 1,081.05 mi (1,739.79 km) |
| Montesilvano to Ourense | 1,119.59 mi (1,801.80 km) |
| Montesilvano to Oviedo | 1,010.65 mi (1,626.48 km) |
| Montesilvano to Paiporta | 788.19 mi (1,268.46 km) |
| Montesilvano to Pajara | 1,853.90 mi (2,983.57 km) |
| Montesilvano to Palafolls | 586.90 mi (944.53 km) |
| Montesilvano to Palafrugell | 563.30 mi (906.55 km) |
| Montesilvano to Palamos | 565.74 mi (910.48 km) |
| Montesilvano to Palencia | 953.96 mi (1,535.25 km) |
