| Melres to Olympia Heights (Florida) | 4,165.15 mi (6,703.16 km) |
| Melres to Omaha (Nebraska) | 4,341.86 mi (6,987.55 km) |
| Melres to On Top of the World Designated Place (Florida) | 4,134.73 mi (6,654.20 km) |
| Melres to Onalaska (Wisconsin) | 4,037.51 mi (6,497.75 km) |
| Melres to Oneida (New York) | 3,356.77 mi (5,402.20 km) |
| Melres to Oneonta (New York) | 3,344.96 mi (5,383.19 km) |
| Melres to Ontario (California) | 5,573.44 mi (8,969.58 km) |
| Melres to Ontario (Oregon) | 5,078.97 mi (8,173.82 km) |
| Melres to Opa-locka (Florida) | 4,154.00 mi (6,685.22 km) |
| Melres to Opelika (Alabama) | 4,156.73 mi (6,689.62 km) |
| Melres to Opelousas (Louisiana) | 4,567.06 mi (7,349.97 km) |
| Melres to Orange (California) | 5,593.62 mi (9,002.06 km) |
| Melres to Orange (Texas) | 4,664.88 mi (7,507.40 km) |
| Melres to Orange City (Florida) | 4,090.60 mi (6,583.18 km) |
| Melres to Orangeburg (South Carolina) | 3,903.79 mi (6,282.54 km) |
