| Watertown Town to Arcos de Valdevez | 3,140.36 mi (5,053.91 km) |
| Watertown Town to Arcozelo | 3,151.33 mi (5,071.58 km) |
| Watertown Town to Arganil | 3,202.86 mi (5,154.50 km) |
| Watertown Town to Arouca | 3,173.55 mi (5,107.34 km) |
| Watertown Town to Arruda dos Vinhos | 3,189.65 mi (5,133.24 km) |
| Watertown Town to Aveiro | 3,162.52 mi (5,089.59 km) |
| Watertown Town to Aver-o-Mar | 3,135.64 mi (5,046.32 km) |
| Watertown Town to Aves | 3,157.00 mi (5,080.69 km) |
| Watertown Town to Azambuja | 3,196.92 mi (5,144.94 km) |
| Watertown Town to Baiao | 3,177.20 mi (5,113.21 km) |
| Watertown Town to Barcelos | 3,139.84 mi (5,053.08 km) |
| Watertown Town to Barreiro | 3,198.99 mi (5,148.27 km) |
| Watertown Town to Batalha | 3,183.19 mi (5,122.85 km) |
| Watertown Town to Beja | 3,275.78 mi (5,271.85 km) |
| Watertown Town to Belas | 3,185.79 mi (5,127.03 km) |
