| Wallingford Center to Oskaloosa (Iowa) | 1,025.56 mi (1,650.49 km) |
| Wallingford Center to Oswego (Illinois) | 801.29 mi (1,289.55 km) |
| Wallingford Center to Oswego (New York) | 233.11 mi (375.15 km) |
| Wallingford Center to Otsego (Minnesota) | 1,074.40 mi (1,729.07 km) |
| Wallingford Center to Ottawa (Illinois) | 828.42 mi (1,333.22 km) |
| Wallingford Center to Ottawa (Kansas) | 1,200.25 mi (1,931.62 km) |
| Wallingford Center to Ottumwa (Iowa) | 1,016.64 mi (1,636.13 km) |
| Wallingford Center to Overland (Missouri) | 945.44 mi (1,521.55 km) |
| Wallingford Center to Overland Park (Kansas) | 1,164.88 mi (1,874.70 km) |
| Wallingford Center to Overlea (Maryland) | 242.10 mi (389.63 km) |
| Wallingford Center to Oviedo (Florida) | 1,001.37 mi (1,611.55 km) |
| Wallingford Center to Owasso (Oklahoma) | 1,283.93 mi (2,066.28 km) |
| Wallingford Center to Owatonna (Minnesota) | 1,048.45 mi (1,687.31 km) |
| Wallingford Center to Owensboro (Kentucky) | 801.63 mi (1,290.10 km) |
| Wallingford Center to Owings Mills (Maryland) | 251.92 mi (405.42 km) |
