| Boulder to Albolote | 5,150.28 mi (8,288.57 km) |
| Boulder to Alboraya | 5,188.89 mi (8,350.72 km) |
| Boulder to Albox | 5,208.46 mi (8,382.20 km) |
| Boulder to Alcala de Guadaira | 5,051.35 mi (8,129.37 km) |
| Boulder to Alcala de Henares | 5,022.43 mi (8,082.83 km) |
| Boulder to Alcala la Real | 5,129.65 mi (8,255.38 km) |
| Boulder to Alcanar | 5,176.14 mi (8,330.20 km) |
| Boulder to Alcaniz | 5,128.96 mi (8,254.26 km) |
| Boulder to Alcantarilla | 5,221.29 mi (8,402.85 km) |
| Boulder to Alcarraz | 5,132.40 mi (8,259.80 km) |
| Boulder to Alcaudete | 5,116.06 mi (8,233.50 km) |
| Boulder to Alcazar de San Juan | 5,075.26 mi (8,167.85 km) |
| Boulder to Alcira | 5,201.06 mi (8,370.30 km) |
| Boulder to Alcobendas | 5,009.13 mi (8,061.41 km) |
| Boulder to Alcora | 5,169.91 mi (8,320.17 km) |
