| Iisalmi to Olympia Heights (Florida) | 5,144.66 mi (8,279.53 km) |
| Iisalmi to Omaha (Nebraska) | 4,558.32 mi (7,335.91 km) |
| Iisalmi to On Top of the World Designated Place (Florida) | 4,987.56 mi (8,026.70 km) |
| Iisalmi to Onalaska (Wisconsin) | 4,289.34 mi (6,903.02 km) |
| Iisalmi to Oneida (New York) | 3,963.53 mi (6,378.69 km) |
| Iisalmi to Oneonta (New York) | 3,984.80 mi (6,412.91 km) |
| Iisalmi to Ontario (California) | 5,421.88 mi (8,725.67 km) |
| Iisalmi to Ontario (Oregon) | 4,748.40 mi (7,641.81 km) |
| Iisalmi to Opa-locka (Florida) | 5,131.47 mi (8,258.30 km) |
| Iisalmi to Opelika (Alabama) | 4,847.27 mi (7,800.93 km) |
| Iisalmi to Opelousas (Louisiana) | 5,146.94 mi (8,283.20 km) |
| Iisalmi to Orange (California) | 5,440.81 mi (8,756.14 km) |
| Iisalmi to Orange (Texas) | 5,212.38 mi (8,388.52 km) |
| Iisalmi to Orange City (Florida) | 4,971.46 mi (8,000.79 km) |
| Iisalmi to Orangeburg (South Carolina) | 4,679.10 mi (7,530.28 km) |
