| Trnava to Oerlinghausen | 465.74 mi (749.54 km) |
| Trnava to Oestrich-Winkel | 446.91 mi (719.23 km) |
| Trnava to Offenburg | 442.46 mi (712.07 km) |
| Trnava to Oftersheim | 414.61 mi (667.25 km) |
| Trnava to Ohrdruf | 350.38 mi (563.88 km) |
| Trnava to Ohringen | 372.36 mi (599.26 km) |
| Trnava to Olbernhau | 247.80 mi (398.80 km) |
| Trnava to Olching | 288.50 mi (464.30 km) |
| Trnava to Oldenburg | 524.94 mi (844.81 km) |
| Trnava to Oldenburg in Holstein | 500.72 mi (805.84 km) |
| Trnava to Olfen | 507.56 mi (816.84 km) |
| Trnava to Olpe | 472.10 mi (759.77 km) |
| Trnava to Olsberg | 454.13 mi (730.85 km) |
| Trnava to Oranienburg | 357.52 mi (575.37 km) |
| Trnava to Ortenberg | 407.26 mi (655.42 km) |
