| Irving to Orbetello | 5,531.35 mi (8,901.85 km) |
| Irving to Oria | 5,875.81 mi (9,456.20 km) |
| Irving to Oristano | 5,521.24 mi (8,885.57 km) |
| Irving to Orta Nova | 5,761.82 mi (9,272.75 km) |
| Irving to Orte | 5,578.76 mi (8,978.15 km) |
| Irving to Ortona | 5,665.21 mi (9,117.27 km) |
| Irving to Orvieto | 5,556.88 mi (8,942.94 km) |
| Irving to Orzinuovi | 5,361.29 mi (8,628.15 km) |
| Irving to Osimo | 5,580.76 mi (8,981.36 km) |
| Irving to Ospitaletto | 5,360.76 mi (8,627.32 km) |
| Irving to Ostuni | 5,863.46 mi (9,436.32 km) |
| Irving to Ottaviano | 5,732.06 mi (9,224.86 km) |
| Irving to Ovada | 5,338.97 mi (8,592.25 km) |
| Irving to Ozieri | 5,512.30 mi (8,871.18 km) |
| Irving to Paceco | 5,771.38 mi (9,288.13 km) |
