| Hamm to Oswego (Illinois) | 4,271.86 mi (6,874.89 km) |
| Hamm to Oswego (New York) | 3,748.71 mi (6,032.96 km) |
| Hamm to Otsego (Minnesota) | 4,277.67 mi (6,884.24 km) |
| Hamm to Ottawa (Illinois) | 4,305.73 mi (6,929.41 km) |
| Hamm to Ottawa (Kansas) | 4,676.03 mi (7,525.34 km) |
| Hamm to Ottumwa (Iowa) | 4,450.77 mi (7,162.82 km) |
| Hamm to Overland (Missouri) | 4,495.38 mi (7,234.62 km) |
| Hamm to Overland Park (Kansas) | 4,640.67 mi (7,468.44 km) |
| Hamm to Overlea (Maryland) | 3,936.84 mi (6,335.73 km) |
| Hamm to Oviedo (Florida) | 4,650.71 mi (7,484.60 km) |
| Hamm to Owasso (Oklahoma) | 4,817.91 mi (7,753.68 km) |
| Hamm to Owatonna (Minnesota) | 4,323.50 mi (6,958.01 km) |
| Hamm to Owensboro (Kentucky) | 4,422.44 mi (7,117.23 km) |
| Hamm to Owings Mills (Maryland) | 3,945.38 mi (6,349.48 km) |
| Hamm to Owosso (Michigan) | 4,056.89 mi (6,528.93 km) |
