| Spanish Lake to Oskaloosa (Iowa) | 215.59 mi (346.95 km) |
| Spanish Lake to Oswego (Illinois) | 223.02 mi (358.91 km) |
| Spanish Lake to Oswego (New York) | 781.58 mi (1,257.83 km) |
| Spanish Lake to Otsego (Minnesota) | 480.49 mi (773.27 km) |
| Spanish Lake to Ottawa (Illinois) | 191.82 mi (308.70 km) |
| Spanish Lake to Ottawa (Kansas) | 272.93 mi (439.23 km) |
| Spanish Lake to Ottumwa (Iowa) | 193.62 mi (311.60 km) |
| Spanish Lake to Overland (Missouri) | 10.76 mi (17.31 km) |
| Spanish Lake to Overland Park (Kansas) | 241.14 mi (388.08 km) |
| Spanish Lake to Overlea (Maryland) | 734.68 mi (1,182.36 km) |
| Spanish Lake to Oviedo (Florida) | 869.96 mi (1,400.06 km) |
| Spanish Lake to Owasso (Oklahoma) | 353.13 mi (568.31 km) |
| Spanish Lake to Owatonna (Minnesota) | 398.38 mi (641.13 km) |
| Spanish Lake to Owensboro (Kentucky) | 182.13 mi (293.11 km) |
| Spanish Lake to Owings Mills (Maryland) | 720.00 mi (1,158.74 km) |
