| Abertillery to Olympia Heights (Florida) | 4,306.94 mi (6,931.35 km) |
| Abertillery to Omaha (Nebraska) | 4,172.77 mi (6,715.43 km) |
| Abertillery to On Top of the World Designated Place (Florida) | 4,219.73 mi (6,790.99 km) |
| Abertillery to Onalaska (Wisconsin) | 3,868.95 mi (6,226.48 km) |
| Abertillery to Oneida (New York) | 3,301.13 mi (5,312.65 km) |
| Abertillery to Oneonta (New York) | 3,303.06 mi (5,315.76 km) |
| Abertillery to Ontario (California) | 5,312.57 mi (8,549.76 km) |
| Abertillery to Ontario (Oregon) | 4,736.77 mi (7,623.09 km) |
| Abertillery to Opa-locka (Florida) | 4,294.51 mi (6,911.35 km) |
| Abertillery to Opelika (Alabama) | 4,172.79 mi (6,715.46 km) |
| Abertillery to Opelousas (Louisiana) | 4,552.39 mi (7,326.37 km) |
| Abertillery to Orange (California) | 5,332.99 mi (8,582.62 km) |
| Abertillery to Orange (Texas) | 4,640.53 mi (7,468.21 km) |
| Abertillery to Orange City (Florida) | 4,186.26 mi (6,737.14 km) |
| Abertillery to Orangeburg (South Carolina) | 3,946.27 mi (6,350.91 km) |
