| Montesilvano to Oerlinghausen | 701.42 mi (1,128.82 km) |
| Montesilvano to Oestrich-Winkel | 594.35 mi (956.51 km) |
| Montesilvano to Offenburg | 509.33 mi (819.69 km) |
| Montesilvano to Oftersheim | 543.61 mi (874.86 km) |
| Montesilvano to Ohrdruf | 596.66 mi (960.24 km) |
| Montesilvano to Ohringen | 513.03 mi (825.63 km) |
| Montesilvano to Olbernhau | 564.60 mi (908.64 km) |
| Montesilvano to Olching | 416.15 mi (669.73 km) |
| Montesilvano to Oldenburg | 783.68 mi (1,261.21 km) |
| Montesilvano to Oldenburg in Holstein | 827.75 mi (1,332.14 km) |
| Montesilvano to Olfen | 710.25 mi (1,143.04 km) |
| Montesilvano to Olpe | 658.56 mi (1,059.85 km) |
| Montesilvano to Olsberg | 665.97 mi (1,071.77 km) |
| Montesilvano to Oranienburg | 708.79 mi (1,140.68 km) |
| Montesilvano to Ortenberg | 593.27 mi (954.78 km) |
