| Rhondda to Norton Shores (Michigan) | 3,706.88 mi (5,965.65 km) |
| Rhondda to Norwalk (California) | 5,331.29 mi (8,579.89 km) |
| Rhondda to Norwalk (Connecticut) | 3,282.89 mi (5,283.30 km) |
| Rhondda to Norwalk (Iowa) | 4,067.09 mi (6,545.35 km) |
| Rhondda to Norwalk (Ohio) | 3,649.44 mi (5,873.21 km) |
| Rhondda to Norwich (Connecticut) | 3,209.67 mi (5,165.47 km) |
| Rhondda to Norwood (Ohio) | 3,817.27 mi (6,143.30 km) |
| Rhondda to Novato (California) | 5,235.98 mi (8,426.49 km) |
| Rhondda to Novi (Michigan) | 3,629.63 mi (5,841.33 km) |
| Rhondda to O'Fallon (Illinois) | 4,059.76 mi (6,533.55 km) |
| Rhondda to O'Fallon (Missouri) | 4,082.16 mi (6,569.60 km) |
| Rhondda to Oak Creek (Wisconsin) | 3,782.89 mi (6,087.98 km) |
| Rhondda to Oak Forest (Illinois) | 3,835.12 mi (6,172.03 km) |
| Rhondda to Oak Grove (Oregon) | 4,821.76 mi (7,759.87 km) |
| Rhondda to Oak Grove (South Carolina) | 3,924.72 mi (6,316.23 km) |
