| Ardmore to Orbetello | 5,472.93 mi (8,807.82 km) |
| Ardmore to Oria | 5,815.54 mi (9,359.20 km) |
| Ardmore to Oristano | 5,467.01 mi (8,798.30 km) |
| Ardmore to Orta Nova | 5,701.90 mi (9,176.33 km) |
| Ardmore to Orte | 5,519.65 mi (8,883.02 km) |
| Ardmore to Ortona | 5,605.07 mi (9,020.48 km) |
| Ardmore to Orvieto | 5,497.67 mi (8,847.64 km) |
| Ardmore to Orzinuovi | 5,300.50 mi (8,530.33 km) |
| Ardmore to Osimo | 5,520.02 mi (8,883.61 km) |
| Ardmore to Ospitaletto | 5,299.75 mi (8,529.12 km) |
| Ardmore to Ostuni | 5,802.99 mi (9,339.01 km) |
| Ardmore to Ottaviano | 5,673.35 mi (9,130.37 km) |
| Ardmore to Ovada | 5,279.64 mi (8,496.75 km) |
| Ardmore to Ozieri | 5,457.09 mi (8,782.33 km) |
| Ardmore to Paceco | 5,716.77 mi (9,200.25 km) |
