| Howard to Arcos de Valdevez | 3,849.51 mi (6,195.19 km) |
| Howard to Arcozelo | 3,868.95 mi (6,226.47 km) |
| Howard to Arganil | 3,926.04 mi (6,318.35 km) |
| Howard to Arouca | 3,890.82 mi (6,261.68 km) |
| Howard to Arruda dos Vinhos | 3,927.62 mi (6,320.90 km) |
| Howard to Aveiro | 3,884.14 mi (6,250.93 km) |
| Howard to Aver-o-Mar | 3,850.42 mi (6,196.65 km) |
| Howard to Aves | 3,869.66 mi (6,227.61 km) |
| Howard to Azambuja | 3,933.42 mi (6,330.23 km) |
| Howard to Baiao | 3,891.46 mi (6,262.70 km) |
| Howard to Barcelos | 3,852.96 mi (6,200.74 km) |
| Howard to Barreiro | 3,939.67 mi (6,340.29 km) |
| Howard to Batalha | 3,914.32 mi (6,299.49 km) |
| Howard to Beja | 4,017.31 mi (6,465.23 km) |
| Howard to Belas | 3,926.32 mi (6,318.80 km) |
