| Abertawe to Oswego (Illinois) | 3,833.55 mi (6,169.50 km) |
| Abertawe to Oswego (New York) | 3,289.01 mi (5,293.16 km) |
| Abertawe to Otsego (Minnesota) | 3,868.40 mi (6,225.58 km) |
| Abertawe to Ottawa (Illinois) | 3,867.50 mi (6,224.14 km) |
| Abertawe to Ottawa (Kansas) | 4,245.83 mi (6,833.01 km) |
| Abertawe to Ottumwa (Iowa) | 4,021.07 mi (6,471.29 km) |
| Abertawe to Overland (Missouri) | 4,051.95 mi (6,520.98 km) |
| Abertawe to Overland Park (Kansas) | 4,209.80 mi (6,775.03 km) |
| Abertawe to Overlea (Maryland) | 3,463.97 mi (5,574.72 km) |
| Abertawe to Oviedo (Florida) | 4,162.50 mi (6,698.90 km) |
| Abertawe to Owasso (Oklahoma) | 4,381.66 mi (7,051.60 km) |
| Abertawe to Owatonna (Minnesota) | 3,908.14 mi (6,289.54 km) |
| Abertawe to Owensboro (Kentucky) | 3,967.76 mi (6,385.49 km) |
| Abertawe to Owings Mills (Maryland) | 3,473.17 mi (5,589.53 km) |
| Abertawe to Owosso (Michigan) | 3,612.95 mi (5,814.48 km) |
