| Potomac to Torres Vedras | 3,553.24 mi (5,718.38 km) |
| Potomac to Trancoso | 3,601.60 mi (5,796.22 km) |
| Potomac to Trofa | 3,528.83 mi (5,679.11 km) |
| Potomac to Vagos | 3,543.05 mi (5,701.99 km) |
| Potomac to Valadares | 3,531.19 mi (5,682.90 km) |
| Potomac to Valbom | 3,533.68 mi (5,686.92 km) |
| Potomac to Vale de Cambra | 3,549.04 mi (5,711.62 km) |
| Potomac to Valenca | 3,508.26 mi (5,646.00 km) |
| Potomac to Valongo | 3,535.63 mi (5,690.05 km) |
| Potomac to Vendas Novas | 3,604.50 mi (5,800.89 km) |
| Potomac to Viana do Castelo | 3,506.52 mi (5,643.20 km) |
| Potomac to Vieira do Minho | 3,541.85 mi (5,700.06 km) |
| Potomac to Vila do Conde | 3,519.52 mi (5,664.12 km) |
| Potomac to Vila Franca do Campo | 2,766.88 mi (4,452.87 km) |
| Potomac to Vila Nova de Cerveira | 3,507.10 mi (5,644.13 km) |
