| Pontypridd to Orangevale (California) | 5,164.11 mi (8,310.84 km) |
| Pontypridd to Orchards (Washington) | 4,806.27 mi (7,734.94 km) |
| Pontypridd to Orcutt (California) | 5,356.26 mi (8,620.07 km) |
| Pontypridd to Oregon (Ohio) | 3,667.29 mi (5,901.94 km) |
| Pontypridd to Oregon (Wisconsin) | 3,840.96 mi (6,181.43 km) |
| Pontypridd to Oregon City (Oregon) | 4,827.57 mi (7,769.23 km) |
| Pontypridd to Orem (Utah) | 4,770.34 mi (7,677.12 km) |
| Pontypridd to Orinda (California) | 5,239.49 mi (8,432.15 km) |
| Pontypridd to Orland Park (Illinois) | 3,842.59 mi (6,184.05 km) |
| Pontypridd to Orlando (Florida) | 4,203.67 mi (6,765.15 km) |
| Pontypridd to Ormond Beach (Florida) | 4,153.08 mi (6,683.74 km) |
| Pontypridd to Oro Valley (Arizona) | 5,171.67 mi (8,323.00 km) |
| Pontypridd to Oroville (California) | 5,128.43 mi (8,253.41 km) |
| Pontypridd to Oshkosh (Wisconsin) | 3,759.98 mi (6,051.10 km) |
| Pontypridd to Oskaloosa (Iowa) | 4,040.15 mi (6,502.00 km) |
