| Amherst to Orbetello | 4,532.81 mi (7,294.86 km) |
| Amherst to Oria | 4,879.50 mi (7,852.80 km) |
| Amherst to Oristano | 4,519.86 mi (7,274.01 km) |
| Amherst to Orta Nova | 4,765.05 mi (7,668.60 km) |
| Amherst to Orte | 4,581.01 mi (7,372.42 km) |
| Amherst to Ortona | 4,668.82 mi (7,513.74 km) |
| Amherst to Orvieto | 4,559.27 mi (7,337.44 km) |
| Amherst to Orzinuovi | 4,366.12 mi (7,026.59 km) |
| Amherst to Osimo | 4,585.35 mi (7,379.41 km) |
| Amherst to Ospitaletto | 4,365.99 mi (7,026.38 km) |
| Amherst to Ostuni | 4,867.44 mi (7,833.38 km) |
| Amherst to Ottaviano | 4,733.76 mi (7,618.25 km) |
| Amherst to Ovada | 4,341.64 mi (6,987.19 km) |
| Amherst to Ozieri | 4,511.27 mi (7,260.19 km) |
| Amherst to Paceco | 4,770.09 mi (7,676.72 km) |
