| Evanston to Olympia Heights (Florida) | 1,202.89 mi (1,935.86 km) |
| Evanston to Omaha (Nebraska) | 434.71 mi (699.60 km) |
| Evanston to On Top of the World Designated Place (Florida) | 943.80 mi (1,518.90 km) |
| Evanston to Onalaska (Wisconsin) | 218.47 mi (351.60 km) |
| Evanston to Oneida (New York) | 615.91 mi (991.20 km) |
| Evanston to Oneonta (New York) | 645.85 mi (1,039.39 km) |
| Evanston to Ontario (California) | 1,708.77 mi (2,750.00 km) |
| Evanston to Ontario (Oregon) | 1,477.27 mi (2,377.44 km) |
| Evanston to Opa-locka (Florida) | 1,193.06 mi (1,920.04 km) |
| Evanston to Opelika (Alabama) | 660.75 mi (1,063.38 km) |
| Evanston to Opelousas (Louisiana) | 832.37 mi (1,339.57 km) |
| Evanston to Orange (California) | 1,727.30 mi (2,779.82 km) |
| Evanston to Orange (Texas) | 890.15 mi (1,432.55 km) |
| Evanston to Orange City (Florida) | 974.22 mi (1,567.85 km) |
| Evanston to Orangeburg (South Carolina) | 698.23 mi (1,123.70 km) |
