| Havelock to Olympia Heights (Florida) | 666.75 mi (1,073.03 km) |
| Havelock to Omaha (Nebraska) | 1,127.31 mi (1,814.22 km) |
| Havelock to On Top of the World Designated Place (Florida) | 510.05 mi (820.85 km) |
| Havelock to Onalaska (Wisconsin) | 981.75 mi (1,579.97 km) |
| Havelock to Oneida (New York) | 568.30 mi (914.60 km) |
| Havelock to Oneonta (New York) | 530.71 mi (854.09 km) |
| Havelock to Ontario (California) | 2,303.28 mi (3,706.77 km) |
| Havelock to Ontario (Oregon) | 2,204.62 mi (3,547.99 km) |
| Havelock to Opa-locka (Florida) | 653.62 mi (1,051.90 km) |
| Havelock to Opelika (Alabama) | 510.81 mi (822.07 km) |
| Havelock to Opelousas (Louisiana) | 931.94 mi (1,499.81 km) |
| Havelock to Orange (California) | 2,319.08 mi (3,732.21 km) |
| Havelock to Orange (Texas) | 1,034.99 mi (1,665.66 km) |
| Havelock to Orange City (Florida) | 486.25 mi (782.55 km) |
| Havelock to Orangeburg (South Carolina) | 246.93 mi (397.39 km) |
