| Amherst to Oerlinghausen | 4,082.81 mi (6,570.65 km) |
| Amherst to Oestrich-Winkel | 4,124.18 mi (6,637.22 km) |
| Amherst to Offenburg | 4,174.61 mi (6,718.39 km) |
| Amherst to Oftersheim | 4,168.56 mi (6,708.65 km) |
| Amherst to Ohrdruf | 4,199.26 mi (6,758.05 km) |
| Amherst to Ohringen | 4,210.06 mi (6,775.44 km) |
| Amherst to Olbernhau | 4,301.86 mi (6,923.17 km) |
| Amherst to Olching | 4,316.84 mi (6,947.28 km) |
| Amherst to Oldenburg | 4,027.17 mi (6,481.10 km) |
| Amherst to Oldenburg in Holstein | 4,084.58 mi (6,573.49 km) |
| Amherst to Olfen | 4,043.08 mi (6,506.70 km) |
| Amherst to Olpe | 4,083.35 mi (6,571.51 km) |
| Amherst to Olsberg | 4,096.71 mi (6,593.02 km) |
| Amherst to Oranienburg | 4,221.95 mi (6,794.56 km) |
| Amherst to Ortenberg | 4,152.41 mi (6,682.66 km) |
