| Conwy to Oswego (Illinois) | 3,789.40 mi (6,098.44 km) |
| Conwy to Oswego (New York) | 3,255.16 mi (5,238.67 km) |
| Conwy to Otsego (Minnesota) | 3,812.76 mi (6,136.05 km) |
| Conwy to Ottawa (Illinois) | 3,823.34 mi (6,153.07 km) |
| Conwy to Ottawa (Kansas) | 4,198.48 mi (6,756.81 km) |
| Conwy to Ottumwa (Iowa) | 3,973.37 mi (6,394.52 km) |
| Conwy to Overland (Missouri) | 4,010.26 mi (6,453.89 km) |
| Conwy to Overland Park (Kansas) | 4,162.71 mi (6,699.23 km) |
| Conwy to Overlea (Maryland) | 3,438.28 mi (5,533.38 km) |
| Conwy to Oviedo (Florida) | 4,149.03 mi (6,677.22 km) |
| Conwy to Owasso (Oklahoma) | 4,336.95 mi (6,979.65 km) |
| Conwy to Owatonna (Minnesota) | 3,854.75 mi (6,203.62 km) |
| Conwy to Owensboro (Kentucky) | 3,931.55 mi (6,327.22 km) |
| Conwy to Owings Mills (Maryland) | 3,447.04 mi (5,547.48 km) |
| Conwy to Owosso (Michigan) | 3,571.22 mi (5,747.33 km) |
