| Cave Spring to Olympia Heights (Florida) | 794.91 mi (1,279.28 km) |
| Cave Spring to Omaha (Nebraska) | 901.20 mi (1,450.34 km) |
| Cave Spring to On Top of the World Designated Place (Florida) | 576.23 mi (927.36 km) |
| Cave Spring to Onalaska (Wisconsin) | 745.59 mi (1,199.92 km) |
| Cave Spring to Oneida (New York) | 464.71 mi (747.88 km) |
| Cave Spring to Oneonta (New York) | 446.21 mi (718.10 km) |
| Cave Spring to Ontario (California) | 2,109.08 mi (3,394.23 km) |
| Cave Spring to Ontario (Oregon) | 1,977.05 mi (3,181.75 km) |
| Cave Spring to Opa-locka (Florida) | 782.67 mi (1,259.58 km) |
| Cave Spring to Opelika (Alabama) | 437.95 mi (704.81 km) |
| Cave Spring to Opelousas (Louisiana) | 832.00 mi (1,338.98 km) |
| Cave Spring to Orange (California) | 2,125.68 mi (3,420.95 km) |
| Cave Spring to Orange (Texas) | 929.22 mi (1,495.43 km) |
| Cave Spring to Orange City (Florida) | 577.59 mi (929.53 km) |
| Cave Spring to Orangeburg (South Carolina) | 262.41 mi (422.30 km) |
