| Tarpon Springs to Octeville | 4,381.27 mi (7,050.98 km) |
| Tarpon Springs to Oignies | 4,565.94 mi (7,348.17 km) |
| Tarpon Springs to Oissel | 4,505.12 mi (7,250.28 km) |
| Tarpon Springs to Olivet | 4,568.26 mi (7,351.91 km) |
| Tarpon Springs to Ollioules | 4,852.61 mi (7,809.52 km) |
| Tarpon Springs to Olonne-sur-Mer | 4,426.21 mi (7,123.30 km) |
| Tarpon Springs to Oloron-Sainte-Marie | 4,543.20 mi (7,311.57 km) |
| Tarpon Springs to Onet Village | 4,671.38 mi (7,517.85 km) |
| Tarpon Springs to Onnaing | 4,593.07 mi (7,391.83 km) |
| Tarpon Springs to Orange | 4,780.25 mi (7,693.07 km) |
| Tarpon Springs to Orchies | 4,576.43 mi (7,365.06 km) |
| Tarpon Springs to Orleans | 4,567.89 mi (7,351.31 km) |
| Tarpon Springs to Orly | 4,573.01 mi (7,359.54 km) |
| Tarpon Springs to Ormesson-sur-Marne | 4,578.56 mi (7,368.48 km) |
| Tarpon Springs to Orsay | 4,564.90 mi (7,346.49 km) |
