| Pontneddfechan to Orangevale (California) | 5,149.17 mi (8,286.79 km) |
| Pontneddfechan to Orchards (Washington) | 4,791.36 mi (7,710.95 km) |
| Pontneddfechan to Orcutt (California) | 5,341.35 mi (8,596.08 km) |
| Pontneddfechan to Oregon (Ohio) | 3,653.47 mi (5,879.70 km) |
| Pontneddfechan to Oregon (Wisconsin) | 3,826.72 mi (6,158.52 km) |
| Pontneddfechan to Oregon City (Oregon) | 4,812.67 mi (7,745.24 km) |
| Pontneddfechan to Orem (Utah) | 4,755.48 mi (7,653.21 km) |
| Pontneddfechan to Orinda (California) | 5,224.56 mi (8,408.11 km) |
| Pontneddfechan to Orland Park (Illinois) | 3,828.53 mi (6,161.42 km) |
| Pontneddfechan to Orlando (Florida) | 4,191.46 mi (6,745.51 km) |
| Pontneddfechan to Ormond Beach (Florida) | 4,140.81 mi (6,663.98 km) |
| Pontneddfechan to Oro Valley (Arizona) | 5,157.04 mi (8,299.46 km) |
| Pontneddfechan to Oroville (California) | 5,113.49 mi (8,229.37 km) |
| Pontneddfechan to Oshkosh (Wisconsin) | 3,745.69 mi (6,028.11 km) |
| Pontneddfechan to Oskaloosa (Iowa) | 4,025.87 mi (6,479.01 km) |
