| Pontypridd to Odessa (Texas) | 4,881.26 mi (7,855.63 km) |
| Pontypridd to Ogden (Utah) | 4,729.45 mi (7,611.31 km) |
| Pontypridd to Oildale (California) | 5,279.59 mi (8,496.68 km) |
| Pontypridd to Ojus (Florida) | 4,279.75 mi (6,887.60 km) |
| Pontypridd to Okemos (Michigan) | 3,659.14 mi (5,888.82 km) |
| Pontypridd to Oklahoma City (Oklahoma) | 4,511.45 mi (7,260.47 km) |
| Pontypridd to Okmulgee (Oklahoma) | 4,446.07 mi (7,155.26 km) |
| Pontypridd to Olathe (Kansas) | 4,238.70 mi (6,821.54 km) |
| Pontypridd to Old Jamestown (Missouri) | 4,066.04 mi (6,543.66 km) |
| Pontypridd to Oldsmar (Florida) | 4,281.16 mi (6,889.86 km) |
| Pontypridd to Olean (New York) | 3,449.16 mi (5,550.89 km) |
| Pontypridd to Olive Branch (Mississippi) | 4,235.91 mi (6,817.03 km) |
| Pontypridd to Olivehurst (California) | 5,152.13 mi (8,291.55 km) |
| Pontypridd to Olney (Maryland) | 3,521.71 mi (5,667.64 km) |
| Pontypridd to Olympia (Washington) | 4,740.19 mi (7,628.59 km) |
