| Trnava to Octeville | 873.56 mi (1,405.85 km) |
| Trnava to Oignies | 670.48 mi (1,079.03 km) |
| Trnava to Oissel | 751.34 mi (1,209.17 km) |
| Trnava to Olivet | 723.19 mi (1,163.85 km) |
| Trnava to Ollioules | 670.70 mi (1,079.38 km) |
| Trnava to Olonne-sur-Mer | 910.90 mi (1,465.95 km) |
| Trnava to Oloron-Sainte-Marie | 944.08 mi (1,519.35 km) |
| Trnava to Onet Village | 765.12 mi (1,231.34 km) |
| Trnava to Onnaing | 643.38 mi (1,035.43 km) |
| Trnava to Orange | 675.96 mi (1,087.85 km) |
| Trnava to Orchies | 659.58 mi (1,061.50 km) |
| Trnava to Orleans | 722.40 mi (1,162.60 km) |
| Trnava to Orly | 694.16 mi (1,117.15 km) |
| Trnava to Ormesson-sur-Marne | 687.37 mi (1,106.22 km) |
| Trnava to Orsay | 703.71 mi (1,132.52 km) |
