| Herrin to Olympia Heights (Florida) | 976.97 mi (1,572.29 km) |
| Herrin to Omaha (Nebraska) | 444.01 mi (714.56 km) |
| Herrin to On Top of the World Designated Place (Florida) | 714.93 mi (1,150.58 km) |
| Herrin to Onalaska (Wisconsin) | 435.85 mi (701.43 km) |
| Herrin to Oneida (New York) | 790.68 mi (1,272.48 km) |
| Herrin to Oneonta (New York) | 803.55 mi (1,293.19 km) |
| Herrin to Ontario (California) | 1,613.48 mi (2,596.64 km) |
| Herrin to Ontario (Oregon) | 1,513.01 mi (2,434.96 km) |
| Herrin to Opa-locka (Florida) | 968.98 mi (1,559.42 km) |
| Herrin to Opelika (Alabama) | 410.40 mi (660.47 km) |
| Herrin to Opelousas (Louisiana) | 531.84 mi (855.92 km) |
| Herrin to Orange (California) | 1,630.21 mi (2,623.56 km) |
| Herrin to Orange (Texas) | 595.37 mi (958.16 km) |
| Herrin to Orange City (Florida) | 757.39 mi (1,218.90 km) |
| Herrin to Orangeburg (South Carolina) | 546.09 mi (878.85 km) |
