| Cwmbran to Orangevale (California) | 5,171.47 mi (8,322.68 km) |
| Cwmbran to Orchards (Washington) | 4,812.53 mi (7,745.02 km) |
| Cwmbran to Orcutt (California) | 5,364.20 mi (8,632.85 km) |
| Cwmbran to Oregon (Ohio) | 3,678.58 mi (5,920.11 km) |
| Cwmbran to Oregon (Wisconsin) | 3,851.50 mi (6,198.40 km) |
| Cwmbran to Oregon City (Oregon) | 4,833.88 mi (7,779.37 km) |
| Cwmbran to Orem (Utah) | 4,778.77 mi (7,690.68 km) |
| Cwmbran to Orinda (California) | 5,246.82 mi (8,443.94 km) |
| Cwmbran to Orland Park (Illinois) | 3,853.47 mi (6,201.57 km) |
| Cwmbran to Orlando (Florida) | 4,216.59 mi (6,785.95 km) |
| Cwmbran to Ormond Beach (Florida) | 4,165.96 mi (6,704.47 km) |
| Cwmbran to Oro Valley (Arizona) | 5,181.18 mi (8,338.30 km) |
| Cwmbran to Oroville (California) | 5,135.64 mi (8,265.02 km) |
| Cwmbran to Oshkosh (Wisconsin) | 3,770.43 mi (6,067.92 km) |
| Cwmbran to Oskaloosa (Iowa) | 4,050.61 mi (6,518.82 km) |
