| New Port Richey to Orbetello | 5,116.29 mi (8,233.87 km) |
| New Port Richey to Oria | 5,473.67 mi (8,809.02 km) |
| New Port Richey to Oristano | 5,061.14 mi (8,145.11 km) |
| New Port Richey to Orta Nova | 5,358.16 mi (8,623.13 km) |
| New Port Richey to Orte | 5,170.23 mi (8,320.69 km) |
| New Port Richey to Ortona | 5,266.43 mi (8,475.49 km) |
| New Port Richey to Orvieto | 5,150.07 mi (8,288.24 km) |
| New Port Richey to Orzinuovi | 4,977.37 mi (8,010.30 km) |
| New Port Richey to Osimo | 5,190.91 mi (8,353.96 km) |
| New Port Richey to Ospitaletto | 4,979.56 mi (8,013.83 km) |
| New Port Richey to Ostuni | 5,463.77 mi (8,793.09 km) |
| New Port Richey to Ottaviano | 5,315.49 mi (8,554.46 km) |
| New Port Richey to Ovada | 4,938.84 mi (7,948.29 km) |
| New Port Richey to Ozieri | 5,062.67 mi (8,147.57 km) |
| New Port Richey to Paceco | 5,309.71 mi (8,545.15 km) |
