| Tarpon Springs to Orbetello | 5,122.73 mi (8,244.24 km) |
| Tarpon Springs to Oria | 5,480.14 mi (8,819.43 km) |
| Tarpon Springs to Oristano | 5,067.38 mi (8,155.16 km) |
| Tarpon Springs to Orta Nova | 5,364.63 mi (8,633.54 km) |
| Tarpon Springs to Orte | 5,176.70 mi (8,331.10 km) |
| Tarpon Springs to Ortona | 5,272.93 mi (8,485.95 km) |
| Tarpon Springs to Orvieto | 5,156.55 mi (8,298.67 km) |
| Tarpon Springs to Orzinuovi | 4,983.96 mi (8,020.90 km) |
| Tarpon Springs to Osimo | 5,197.45 mi (8,364.49 km) |
| Tarpon Springs to Ospitaletto | 4,986.16 mi (8,024.45 km) |
| Tarpon Springs to Ostuni | 5,470.25 mi (8,803.52 km) |
| Tarpon Springs to Ottaviano | 5,321.92 mi (8,564.80 km) |
| Tarpon Springs to Ovada | 4,945.36 mi (7,958.79 km) |
| Tarpon Springs to Ozieri | 5,068.96 mi (8,157.70 km) |
| Tarpon Springs to Paceco | 5,315.92 mi (8,555.15 km) |
