| Ridge to Orangeburg (South Carolina) | 674.32 mi (1,085.21 km) |
| Ridge to Orangevale (California) | 2,537.83 mi (4,084.24 km) |
| Ridge to Orchards (Washington) | 2,478.03 mi (3,988.00 km) |
| Ridge to Orcutt (California) | 2,593.51 mi (4,173.85 km) |
| Ridge to Oregon (Ohio) | 549.89 mi (884.96 km) |
| Ridge to Oregon (Wisconsin) | 858.66 mi (1,381.88 km) |
| Ridge to Oregon City (Oregon) | 2,485.46 mi (3,999.97 km) |
| Ridge to Orem (Utah) | 2,019.84 mi (3,250.62 km) |
| Ridge to Orinda (California) | 2,605.66 mi (4,193.40 km) |
| Ridge to Orland Park (Illinois) | 778.62 mi (1,253.07 km) |
| Ridge to Orlando (Florida) | 982.81 mi (1,581.68 km) |
| Ridge to Ormond Beach (Florida) | 925.86 mi (1,490.03 km) |
| Ridge to Oro Valley (Arizona) | 2,172.53 mi (3,496.35 km) |
| Ridge to Oroville (California) | 2,537.16 mi (4,083.16 km) |
| Ridge to Oshkosh (Wisconsin) | 826.27 mi (1,329.76 km) |
