| Omaha to Orbetello | 5,093.28 mi (8,196.84 km) |
| Omaha to Oria | 5,426.54 mi (8,733.18 km) |
| Omaha to Oristano | 5,106.00 mi (8,217.32 km) |
| Omaha to Orta Nova | 5,314.90 mi (8,553.50 km) |
| Omaha to Orte | 5,136.84 mi (8,266.95 km) |
| Omaha to Ortona | 5,217.44 mi (8,396.66 km) |
| Omaha to Orvieto | 5,114.48 mi (8,230.97 km) |
| Omaha to Orzinuovi | 4,911.23 mi (7,903.86 km) |
| Omaha to Osimo | 5,130.13 mi (8,256.14 km) |
| Omaha to Ospitaletto | 4,909.48 mi (7,901.04 km) |
| Omaha to Ostuni | 5,413.23 mi (8,711.76 km) |
| Omaha to Ottaviano | 5,291.67 mi (8,516.11 km) |
| Omaha to Ovada | 4,896.78 mi (7,880.60 km) |
| Omaha to Ozieri | 5,091.75 mi (8,194.38 km) |
| Omaha to Paceco | 5,352.94 mi (8,614.73 km) |
