| Okemos to Olympia Heights (Florida) | 1,195.79 mi (1,924.45 km) |
| Okemos to Omaha (Nebraska) | 605.54 mi (974.52 km) |
| Okemos to On Top of the World Designated Place (Florida) | 947.08 mi (1,524.18 km) |
| Okemos to Onalaska (Wisconsin) | 351.17 mi (565.15 km) |
| Okemos to Oneida (New York) | 443.54 mi (713.81 km) |
| Okemos to Oneonta (New York) | 475.60 mi (765.40 km) |
| Okemos to Ontario (California) | 1,881.00 mi (3,027.18 km) |
| Okemos to Ontario (Oregon) | 1,627.49 mi (2,619.20 km) |
| Okemos to Opa-locka (Florida) | 1,184.78 mi (1,906.71 km) |
| Okemos to Opelika (Alabama) | 695.99 mi (1,120.09 km) |
| Okemos to Opelousas (Louisiana) | 941.92 mi (1,515.87 km) |
| Okemos to Orange (California) | 1,899.64 mi (3,057.17 km) |
| Okemos to Orange (Texas) | 1,011.39 mi (1,627.68 km) |
| Okemos to Orange City (Florida) | 967.26 mi (1,556.65 km) |
| Okemos to Orangeburg (South Carolina) | 664.94 mi (1,070.12 km) |
