| Holly Hill to Olympia Heights (Florida) | 247.06 mi (397.60 km) |
| Holly Hill to Omaha (Nebraska) | 1,182.58 mi (1,903.17 km) |
| Holly Hill to On Top of the World Designated Place (Florida) | 75.42 mi (121.38 km) |
| Holly Hill to Onalaska (Wisconsin) | 1,156.20 mi (1,860.73 km) |
| Holly Hill to Oneida (New York) | 1,001.25 mi (1,611.35 km) |
| Holly Hill to Oneonta (New York) | 971.61 mi (1,563.65 km) |
| Holly Hill to Ontario (California) | 2,164.36 mi (3,483.19 km) |
| Holly Hill to Ontario (Oregon) | 2,214.79 mi (3,564.36 km) |
| Holly Hill to Opa-locka (Florida) | 236.11 mi (379.98 km) |
| Holly Hill to Opelika (Alabama) | 348.61 mi (561.04 km) |
| Holly Hill to Opelousas (Louisiana) | 666.69 mi (1,072.93 km) |
| Holly Hill to Orange (California) | 2,177.16 mi (3,503.80 km) |
| Holly Hill to Orange (Texas) | 765.20 mi (1,231.47 km) |
| Holly Hill to Orange City (Florida) | 25.88 mi (41.65 km) |
| Holly Hill to Orangeburg (South Carolina) | 293.74 mi (472.73 km) |
