| Chelm to Olympia Heights (Florida) | 5,409.43 mi (8,705.64 km) |
| Chelm to Omaha (Nebraska) | 5,090.83 mi (8,192.89 km) |
| Chelm to On Top of the World Designated Place (Florida) | 5,300.60 mi (8,530.49 km) |
| Chelm to Onalaska (Wisconsin) | 4,799.10 mi (7,723.41 km) |
| Chelm to Oneida (New York) | 4,330.79 mi (6,969.74 km) |
| Chelm to Oneonta (New York) | 4,340.51 mi (6,985.37 km) |
| Chelm to Ontario (California) | 6,094.74 mi (9,808.54 km) |
| Chelm to Ontario (Oregon) | 5,448.81 mi (8,769.00 km) |
| Chelm to Opa-locka (Florida) | 5,396.69 mi (8,685.14 km) |
| Chelm to Opelika (Alabama) | 5,220.33 mi (8,401.30 km) |
| Chelm to Opelousas (Louisiana) | 5,573.27 mi (8,969.31 km) |
| Chelm to Orange (California) | 6,114.56 mi (9,840.44 km) |
| Chelm to Orange (Texas) | 5,653.10 mi (9,097.79 km) |
| Chelm to Orange City (Florida) | 5,272.29 mi (8,484.93 km) |
| Chelm to Orangeburg (South Carolina) | 5,012.21 mi (8,066.38 km) |
