| Valley to Oskaloosa (Iowa) | 715.43 mi (1,151.37 km) |
| Valley to Oswego (Illinois) | 637.14 mi (1,025.38 km) |
| Valley to Oswego (New York) | 872.54 mi (1,404.21 km) |
| Valley to Otsego (Minnesota) | 971.28 mi (1,563.12 km) |
| Valley to Ottawa (Illinois) | 623.60 mi (1,003.58 km) |
| Valley to Ottawa (Kansas) | 692.19 mi (1,113.97 km) |
| Valley to Ottumwa (Iowa) | 693.45 mi (1,116.01 km) |
| Valley to Overland (Missouri) | 499.90 mi (804.52 km) |
| Valley to Overland Park (Kansas) | 677.42 mi (1,090.20 km) |
| Valley to Overlea (Maryland) | 662.07 mi (1,065.50 km) |
| Valley to Oviedo (Florida) | 372.09 mi (598.82 km) |
| Valley to Owasso (Oklahoma) | 651.54 mi (1,048.55 km) |
| Valley to Owatonna (Minnesota) | 891.92 mi (1,435.41 km) |
| Valley to Owensboro (Kentucky) | 358.91 mi (577.61 km) |
| Valley to Owings Mills (Maryland) | 653.20 mi (1,051.22 km) |
