| Rhondda to Tacoma (Washington) | 4,713.95 mi (7,586.37 km) |
| Rhondda to Tahlequah (Oklahoma) | 4,387.97 mi (7,061.75 km) |
| Rhondda to Takoma Park (Maryland) | 3,522.84 mi (5,669.46 km) |
| Rhondda to Talladega (Alabama) | 4,155.21 mi (6,687.17 km) |
| Rhondda to Tallahassee (Florida) | 4,224.84 mi (6,799.22 km) |
| Rhondda to Tallmadge (Ohio) | 3,608.38 mi (5,807.13 km) |
| Rhondda to Tamalpais-Homestead Valley (California) | 5,247.57 mi (8,445.15 km) |
| Rhondda to Tamarac (Florida) | 4,267.85 mi (6,868.44 km) |
| Rhondda to Tamiami (Florida) | 4,296.78 mi (6,915.01 km) |
| Rhondda to Tampa (Florida) | 4,271.11 mi (6,873.68 km) |
| Rhondda to Tanaina (Alaska) | 4,390.55 mi (7,065.90 km) |
| Rhondda to Tanque Verde (Arizona) | 5,168.39 mi (8,317.71 km) |
| Rhondda to Tarboro (North Carolina) | 3,685.03 mi (5,930.48 km) |
| Rhondda to Tarpon Springs (Florida) | 4,276.77 mi (6,882.80 km) |
| Rhondda to Tarrytown (New York) | 3,303.34 mi (5,316.22 km) |
