| Cwmbran to Oakley (California) | 5,225.64 mi (8,409.85 km) |
| Cwmbran to Oakton (Virginia) | 3,554.81 mi (5,720.91 km) |
| Cwmbran to Oakville (Missouri) | 4,097.16 mi (6,593.75 km) |
| Cwmbran to Oatfield (Oregon) | 4,829.92 mi (7,773.01 km) |
| Cwmbran to Ocala (Florida) | 4,216.08 mi (6,785.13 km) |
| Cwmbran to Ocean Acres (New Jersey) | 3,392.76 mi (5,460.12 km) |
| Cwmbran to Ocean City (New Jersey) | 3,426.78 mi (5,514.87 km) |
| Cwmbran to Ocean Pines (Maryland) | 3,488.40 mi (5,614.04 km) |
| Cwmbran to Ocean Pointe (Hawaii) | 7,172.95 mi (11,543.75 km) |
| Cwmbran to Ocean Springs (Mississippi) | 4,430.31 mi (7,129.90 km) |
| Cwmbran to Oceanside (California) | 5,355.51 mi (8,618.86 km) |
| Cwmbran to Oceanside (New York) | 3,327.83 mi (5,355.63 km) |
| Cwmbran to Ocoee (Florida) | 4,219.78 mi (6,791.08 km) |
| Cwmbran to Oconomowoc (Wisconsin) | 3,809.60 mi (6,130.96 km) |
| Cwmbran to Odenton (Maryland) | 3,521.94 mi (5,668.01 km) |
