| Ewa Beach to Olympia Heights (Florida) | 4,857.54 mi (7,817.45 km) |
| Ewa Beach to Omaha (Nebraska) | 3,822.17 mi (6,151.19 km) |
| Ewa Beach to On Top of the World Designated Place (Florida) | 4,685.58 mi (7,540.71 km) |
| Ewa Beach to Onalaska (Wisconsin) | 4,069.67 mi (6,549.51 km) |
| Ewa Beach to Oneida (New York) | 4,849.52 mi (7,804.55 km) |
| Ewa Beach to Oneonta (New York) | 4,887.61 mi (7,865.85 km) |
| Ewa Beach to Ontario (California) | 2,603.91 mi (4,190.59 km) |
| Ewa Beach to Ontario (Oregon) | 2,813.26 mi (4,527.50 km) |
| Ewa Beach to Opa-locka (Florida) | 4,859.46 mi (7,820.55 km) |
| Ewa Beach to Opelika (Alabama) | 4,457.33 mi (7,173.37 km) |
| Ewa Beach to Opelousas (Louisiana) | 4,090.55 mi (6,583.11 km) |
| Ewa Beach to Orange (California) | 2,589.18 mi (4,166.88 km) |
| Ewa Beach to Orange (Texas) | 3,995.11 mi (6,429.51 km) |
| Ewa Beach to Orange City (Florida) | 4,747.01 mi (7,639.58 km) |
| Ewa Beach to Orangeburg (South Carolina) | 4,702.96 mi (7,568.68 km) |
