| Penarth to Black Forest (Colorado) | 4,606.06 mi (7,412.73 km) |
| Penarth to Blackfoot (Idaho) | 4,650.20 mi (7,483.78 km) |
| Penarth to Blackhawk (California) | 5,248.46 mi (8,446.59 km) |
| Penarth to Blacksburg (Virginia) | 3,756.74 mi (6,045.89 km) |
| Penarth to Blackwells Mills (New Jersey) | 3,372.31 mi (5,427.21 km) |
| Penarth to Blaine (Minnesota) | 3,893.05 mi (6,265.25 km) |
| Penarth to Bloomingdale (Florida) | 4,281.98 mi (6,891.18 km) |
| Penarth to Bloomingdale (Illinois) | 3,847.61 mi (6,192.14 km) |
| Penarth to Bloomington (California) | 5,316.35 mi (8,555.84 km) |
| Penarth to Bloomington (Illinois) | 3,949.59 mi (6,356.25 km) |
| Penarth to Bloomington (Indiana) | 3,914.39 mi (6,299.60 km) |
| Penarth to Bloomington (Minnesota) | 3,912.52 mi (6,296.59 km) |
| Penarth to Bloomsburg (Pennsylvania) | 3,426.18 mi (5,513.90 km) |
| Penarth to Blue Ash (Ohio) | 3,825.01 mi (6,155.76 km) |
| Penarth to Blue Island (Illinois) | 3,845.10 mi (6,188.09 km) |
