| Potomac to Glyka Nera | 5,135.25 mi (8,264.39 km) |
| Potomac to Grevena | 4,944.62 mi (7,957.59 km) |
| Potomac to Ialysos | 5,387.88 mi (8,670.96 km) |
| Potomac to Ilion | 5,127.10 mi (8,251.28 km) |
| Potomac to Ilioupoli | 5,133.47 mi (8,261.53 km) |
| Potomac to Ioannina | 4,936.94 mi (7,945.23 km) |
| Potomac to Irakleio | 5,304.55 mi (8,536.85 km) |
| Potomac to Irakleio | 5,129.28 mi (8,254.77 km) |
| Potomac to Kaisariani | 5,132.36 mi (8,259.73 km) |
| Potomac to Kalamaria | 4,988.94 mi (8,028.92 km) |
| Potomac to Kalamata | 5,099.49 mi (8,206.84 km) |
| Potomac to Kallithea | 5,130.61 mi (8,256.92 km) |
| Potomac to Kalymnos | 5,312.92 mi (8,550.32 km) |
| Potomac to Kalyvia Thorikou | 5,144.89 mi (8,279.90 km) |
| Potomac to Kamatero | 5,126.51 mi (8,250.32 km) |
