| Oak Forest to Oakley (California) | 1,807.19 mi (2,908.39 km) |
| Oak Forest to Oakton (Virginia) | 581.79 mi (936.29 km) |
| Oak Forest to Oakville (Missouri) | 256.96 mi (413.53 km) |
| Oak Forest to Oatfield (Oregon) | 1,751.63 mi (2,818.98 km) |
| Oak Forest to Ocala (Florida) | 914.23 mi (1,471.31 km) |
| Oak Forest to Ocean Acres (New Jersey) | 716.83 mi (1,153.62 km) |
| Oak Forest to Ocean City (New Jersey) | 709.41 mi (1,141.68 km) |
| Oak Forest to Ocean Pines (Maryland) | 702.49 mi (1,130.56 km) |
| Oak Forest to Ocean Pointe (Hawaii) | 4,252.46 mi (6,843.67 km) |
| Oak Forest to Ocean Springs (Mississippi) | 775.79 mi (1,248.51 km) |
| Oak Forest to Oceanside (California) | 1,712.08 mi (2,755.32 km) |
| Oak Forest to Oceanside (New York) | 737.00 mi (1,186.09 km) |
| Oak Forest to Ocoee (Florida) | 965.54 mi (1,553.88 km) |
| Oak Forest to Oconomowoc (Wisconsin) | 109.97 mi (176.98 km) |
| Oak Forest to Odenton (Maryland) | 607.79 mi (978.14 km) |
