| Potomac to Entroncamento | 3,582.28 mi (5,765.13 km) |
| Potomac to Ericeira | 3,549.03 mi (5,711.60 km) |
| Potomac to Ermezinde | 3,532.36 mi (5,684.78 km) |
| Potomac to Esmoriz | 3,535.33 mi (5,689.56 km) |
| Potomac to Espinho | 3,533.29 mi (5,686.28 km) |
| Potomac to Esposende | 3,513.10 mi (5,653.79 km) |
| Potomac to Estarreja | 3,543.54 mi (5,702.77 km) |
| Potomac to Estoril | 3,556.98 mi (5,724.40 km) |
| Potomac to Estremoz | 3,642.66 mi (5,862.29 km) |
| Potomac to Evora | 3,634.93 mi (5,849.85 km) |
| Potomac to Fafe | 3,544.90 mi (5,704.97 km) |
| Potomac to Falagueira | 3,564.02 mi (5,735.74 km) |
| Potomac to Famalicao | 3,528.89 mi (5,679.20 km) |
| Potomac to Fanzeres | 3,534.45 mi (5,688.14 km) |
| Potomac to Faro | 3,677.37 mi (5,918.15 km) |
