| Potomac to Zottegem | 3,841.14 mi (6,181.72 km) |
| Potomac to Zulte | 3,825.00 mi (6,155.75 km) |
| Potomac to Zwevegem | 3,823.87 mi (6,153.92 km) |
| Potomac to Zwijndrecht | 3,853.78 mi (6,202.06 km) |
| Potomac to Asenovgrad | 5,009.12 mi (8,061.40 km) |
| Potomac to Aytos | 5,076.46 mi (8,169.78 km) |
| Potomac to Balchik | 5,081.27 mi (8,177.51 km) |
| Potomac to Bankya | 4,909.93 mi (7,901.77 km) |
| Potomac to Bansko | 4,959.82 mi (7,982.06 km) |
| Potomac to Berkovitsa | 4,887.59 mi (7,865.82 km) |
| Potomac to Blagoevgrad | 4,936.19 mi (7,944.04 km) |
| Potomac to Botevgrad | 4,928.47 mi (7,931.61 km) |
| Potomac to Burgas | 5,093.69 mi (8,197.51 km) |
| Potomac to Byala Slatina | 4,911.23 mi (7,903.87 km) |
| Potomac to Chirpan | 5,020.13 mi (8,079.11 km) |
