| Ashtabula to Oswego (Illinois) | 388.53 mi (625.27 km) |
| Ashtabula to Oswego (New York) | 243.81 mi (392.37 km) |
| Ashtabula to Otsego (Minnesota) | 682.20 mi (1,097.89 km) |
| Ashtabula to Ottawa (Illinois) | 416.09 mi (669.63 km) |
| Ashtabula to Ottawa (Kansas) | 794.76 mi (1,279.04 km) |
| Ashtabula to Ottumwa (Iowa) | 604.25 mi (972.44 km) |
| Ashtabula to Overland (Missouri) | 549.88 mi (884.94 km) |
| Ashtabula to Overland Park (Kansas) | 758.68 mi (1,220.97 km) |
| Ashtabula to Overlea (Maryland) | 283.89 mi (456.88 km) |
| Ashtabula to Oviedo (Florida) | 913.85 mi (1,470.69 km) |
| Ashtabula to Owasso (Oklahoma) | 892.36 mi (1,436.11 km) |
| Ashtabula to Owatonna (Minnesota) | 646.00 mi (1,039.63 km) |
| Ashtabula to Owensboro (Kentucky) | 439.77 mi (707.75 km) |
| Ashtabula to Owings Mills (Maryland) | 270.56 mi (435.42 km) |
| Ashtabula to Owosso (Michigan) | 188.65 mi (303.61 km) |
