| Monsummano to Oerlinghausen | 568.37 mi (914.71 km) |
| Monsummano to Oestrich-Winkel | 444.03 mi (714.60 km) |
| Monsummano to Offenburg | 346.42 mi (557.51 km) |
| Monsummano to Oftersheim | 394.71 mi (635.23 km) |
| Monsummano to Ohrdruf | 481.00 mi (774.10 km) |
| Monsummano to Ohringen | 373.76 mi (601.50 km) |
| Monsummano to Olbernhau | 484.35 mi (779.48 km) |
| Monsummano to Olching | 300.36 mi (483.38 km) |
| Monsummano to Oldenburg | 651.86 mi (1,049.06 km) |
| Monsummano to Oldenburg in Holstein | 720.88 mi (1,160.14 km) |
| Monsummano to Olfen | 565.15 mi (909.51 km) |
| Monsummano to Olpe | 513.20 mi (825.91 km) |
| Monsummano to Olsberg | 528.27 mi (850.17 km) |
| Monsummano to Oranienburg | 623.97 mi (1,004.19 km) |
| Monsummano to Ortenberg | 455.90 mi (733.71 km) |
