| Horley to Noventa Vicentina | 673.90 mi (1,084.54 km) |
| Horley to Novi di Modena | 669.59 mi (1,077.61 km) |
| Horley to Novi Ligure | 605.92 mi (975.13 km) |
| Horley to Nuoro | 877.46 mi (1,412.13 km) |
| Horley to Occhiobello | 692.38 mi (1,114.27 km) |
| Horley to Oderzo | 688.03 mi (1,107.28 km) |
| Horley to Oggiono | 572.72 mi (921.71 km) |
| Horley to Olbia | 845.41 mi (1,360.56 km) |
| Horley to Oleggio | 557.46 mi (897.15 km) |
| Horley to Olgiate Comasco | 559.55 mi (900.51 km) |
| Horley to Olgiate Olona | 564.12 mi (907.87 km) |
| Horley to Omegna | 536.01 mi (862.62 km) |
| Horley to Opera | 587.76 mi (945.91 km) |
| Horley to Oppeano | 660.42 mi (1,062.85 km) |
| Horley to Orbassano | 554.47 mi (892.33 km) |
