| Skokie to Olympia (Washington) | 1,750.12 mi (2,816.55 km) |
| Skokie to Olympia Heights (Florida) | 1,203.13 mi (1,936.25 km) |
| Skokie to Omaha (Nebraska) | 432.32 mi (695.75 km) |
| Skokie to On Top of the World Designated Place (Florida) | 943.95 mi (1,519.14 km) |
| Skokie to Onalaska (Wisconsin) | 217.04 mi (349.29 km) |
| Skokie to Oneida (New York) | 618.34 mi (995.13 km) |
| Skokie to Oneonta (New York) | 648.26 mi (1,043.27 km) |
| Skokie to Ontario (California) | 1,706.34 mi (2,746.09 km) |
| Skokie to Ontario (Oregon) | 1,475.20 mi (2,374.10 km) |
| Skokie to Opa-locka (Florida) | 1,193.32 mi (1,920.47 km) |
| Skokie to Opelika (Alabama) | 660.53 mi (1,063.03 km) |
| Skokie to Opelousas (Louisiana) | 830.95 mi (1,337.29 km) |
| Skokie to Orange (California) | 1,724.87 mi (2,775.91 km) |
| Skokie to Orange (Texas) | 888.53 mi (1,429.96 km) |
| Skokie to Orange City (Florida) | 974.50 mi (1,568.31 km) |
