| South Portland to Glyka Nera | 4,659.98 mi (7,499.51 km) |
| South Portland to Grevena | 4,468.74 mi (7,191.75 km) |
| South Portland to Ialysos | 4,911.59 mi (7,904.44 km) |
| South Portland to Ilion | 4,651.87 mi (7,486.46 km) |
| South Portland to Ilioupoli | 4,658.31 mi (7,496.82 km) |
| South Portland to Ioannina | 4,461.75 mi (7,180.49 km) |
| South Portland to Irakleio | 4,831.07 mi (7,774.86 km) |
| South Portland to Irakleio | 4,653.99 mi (7,489.88 km) |
| South Portland to Kaisariani | 4,657.15 mi (7,494.96 km) |
| South Portland to Kalamaria | 4,511.97 mi (7,261.32 km) |
| South Portland to Kalamata | 4,626.28 mi (7,445.28 km) |
| South Portland to Kallithea | 4,655.46 mi (7,492.23 km) |
| South Portland to Kalymnos | 4,836.79 mi (7,784.06 km) |
| South Portland to Kalyvia Thorikou | 4,669.72 mi (7,515.19 km) |
| South Portland to Kamatero | 4,651.25 mi (7,485.46 km) |
