| Trossingen to Oerlinghausen | 268.85 mi (432.68 km) |
| Trossingen to Oestrich-Winkel | 136.05 mi (218.95 km) |
| Trossingen to Offenburg | 42.13 mi (67.80 km) |
| Trossingen to Oftersheim | 89.51 mi (144.05 km) |
| Trossingen to Ohrdruf | 212.20 mi (341.50 km) |
| Trossingen to Ohringen | 87.13 mi (140.22 km) |
| Trossingen to Olbernhau | 276.87 mi (445.58 km) |
| Trossingen to Olching | 123.89 mi (199.38 km) |
| Trossingen to Oldenburg | 350.67 mi (564.35 km) |
| Trossingen to Oldenburg in Holstein | 440.88 mi (709.52 km) |
| Trossingen to Olfen | 257.67 mi (414.68 km) |
| Trossingen to Olpe | 206.37 mi (332.12 km) |
| Trossingen to Olsberg | 226.34 mi (364.26 km) |
| Trossingen to Oranienburg | 381.32 mi (613.67 km) |
| Trossingen to Ortenberg | 158.68 mi (255.37 km) |
