| Security-Widefield to Orbetello | 5,539.22 mi (8,914.51 km) |
| Security-Widefield to Oria | 5,864.85 mi (9,438.57 km) |
| Security-Widefield to Oristano | 5,562.83 mi (8,952.51 km) |
| Security-Widefield to Orta Nova | 5,755.04 mi (9,261.85 km) |
| Security-Widefield to Orte | 5,580.54 mi (8,981.00 km) |
| Security-Widefield to Ortona | 5,657.50 mi (9,104.87 km) |
| Security-Widefield to Orvieto | 5,558.00 mi (8,944.74 km) |
| Security-Widefield to Orzinuovi | 5,351.27 mi (8,612.04 km) |
| Security-Widefield to Osimo | 5,568.89 mi (8,962.27 km) |
| Security-Widefield to Ospitaletto | 5,348.82 mi (8,608.09 km) |
| Security-Widefield to Ostuni | 5,851.03 mi (9,416.33 km) |
| Security-Widefield to Ottaviano | 5,735.56 mi (9,230.49 km) |
| Security-Widefield to Ovada | 5,341.31 mi (8,596.01 km) |
| Security-Widefield to Ozieri | 5,546.28 mi (8,925.87 km) |
| Security-Widefield to Paceco | 5,807.49 mi (9,346.26 km) |
