| Chicago Heights to Oak Harbor (Washington) | 1,758.95 mi (2,830.76 km) |
| Chicago Heights to Oak Hills (Oregon) | 1,771.06 mi (2,850.24 km) |
| Chicago Heights to Oak Lawn (Illinois) | 15.36 mi (24.71 km) |
| Chicago Heights to Oak Park (California) | 1,761.55 mi (2,834.94 km) |
| Chicago Heights to Oak Park (Illinois) | 27.27 mi (43.88 km) |
| Chicago Heights to Oak Park (Michigan) | 237.94 mi (382.93 km) |
| Chicago Heights to Oak Ridge (Florida) | 966.40 mi (1,555.26 km) |
| Chicago Heights to Oak Ridge (New Jersey) | 682.37 mi (1,098.17 km) |
| Chicago Heights to Oak Ridge (Tennessee) | 423.30 mi (681.23 km) |
| Chicago Heights to Oakdale (California) | 1,774.99 mi (2,856.56 km) |
| Chicago Heights to Oakdale (Minnesota) | 359.96 mi (579.30 km) |
| Chicago Heights to Oakland (California) | 1,845.11 mi (2,969.42 km) |
| Chicago Heights to Oakland (New Jersey) | 695.63 mi (1,119.51 km) |
| Chicago Heights to Oakland Park (Florida) | 1,141.87 mi (1,837.66 km) |
| Chicago Heights to Oakleaf Plantation (Florida) | 847.74 mi (1,364.31 km) |
