| Americus to Oerlinghausen | 4,624.16 mi (7,441.87 km) |
| Americus to Oestrich-Winkel | 4,651.16 mi (7,485.32 km) |
| Americus to Offenburg | 4,690.94 mi (7,549.34 km) |
| Americus to Oftersheim | 4,692.58 mi (7,551.98 km) |
| Americus to Ohrdruf | 4,737.53 mi (7,624.31 km) |
| Americus to Ohringen | 4,735.02 mi (7,620.28 km) |
| Americus to Olbernhau | 4,844.72 mi (7,796.82 km) |
| Americus to Olching | 4,839.51 mi (7,788.44 km) |
| Americus to Oldenburg | 4,575.23 mi (7,363.11 km) |
| Americus to Oldenburg in Holstein | 4,644.44 mi (7,474.50 km) |
| Americus to Olfen | 4,580.29 mi (7,371.26 km) |
| Americus to Olpe | 4,616.80 mi (7,430.02 km) |
| Americus to Olsberg | 4,633.69 mi (7,457.20 km) |
| Americus to Oranienburg | 4,777.02 mi (7,687.87 km) |
| Americus to Ortenberg | 4,684.04 mi (7,538.24 km) |
