| Forest Hills to Olympia Heights (Florida) | 1,225.81 mi (1,972.75 km) |
| Forest Hills to Omaha (Nebraska) | 553.57 mi (890.88 km) |
| Forest Hills to On Top of the World Designated Place (Florida) | 973.45 mi (1,566.62 km) |
| Forest Hills to Onalaska (Wisconsin) | 293.99 mi (473.13 km) |
| Forest Hills to Oneida (New York) | 496.23 mi (798.61 km) |
| Forest Hills to Oneonta (New York) | 529.99 mi (852.94 km) |
| Forest Hills to Ontario (California) | 1,829.49 mi (2,944.28 km) |
| Forest Hills to Ontario (Oregon) | 1,570.38 mi (2,527.28 km) |
| Forest Hills to Opa-locka (Florida) | 1,215.10 mi (1,955.51 km) |
| Forest Hills to Opelika (Alabama) | 711.45 mi (1,144.96 km) |
| Forest Hills to Opelousas (Louisiana) | 932.55 mi (1,500.79 km) |
| Forest Hills to Orange (California) | 1,848.24 mi (2,974.45 km) |
| Forest Hills to Orange (Texas) | 997.40 mi (1,605.15 km) |
| Forest Hills to Orange City (Florida) | 996.62 mi (1,603.91 km) |
| Forest Hills to Orangeburg (South Carolina) | 700.14 mi (1,126.76 km) |
