| Echt to Oswego (Illinois) | 4,222.75 mi (6,795.86 km) |
| Echt to Oswego (New York) | 3,692.42 mi (5,942.37 km) |
| Echt to Otsego (Minnesota) | 4,236.98 mi (6,818.76 km) |
| Echt to Ottawa (Illinois) | 4,256.67 mi (6,850.45 km) |
| Echt to Ottawa (Kansas) | 4,629.61 mi (7,450.64 km) |
| Echt to Ottumwa (Iowa) | 4,404.37 mi (7,088.15 km) |
| Echt to Overland (Missouri) | 4,444.80 mi (7,153.22 km) |
| Echt to Overland Park (Kansas) | 4,594.03 mi (7,393.38 km) |
| Echt to Overlea (Maryland) | 3,875.86 mi (6,237.60 km) |
| Echt to Oviedo (Florida) | 4,583.29 mi (7,376.09 km) |
| Echt to Owasso (Oklahoma) | 4,769.73 mi (7,676.14 km) |
| Echt to Owatonna (Minnesota) | 4,281.16 mi (6,889.86 km) |
| Echt to Owensboro (Kentucky) | 4,368.16 mi (7,029.88 km) |
| Echt to Owings Mills (Maryland) | 3,884.66 mi (6,251.76 km) |
| Echt to Owosso (Michigan) | 4,005.91 mi (6,446.89 km) |
