| South Portland to Cesky Tesin | 3,981.49 mi (6,407.60 km) |
| South Portland to Cheb | 3,727.38 mi (5,998.63 km) |
| South Portland to Chocen | 3,880.20 mi (6,244.58 km) |
| South Portland to Chodov | 3,736.88 mi (6,013.94 km) |
| South Portland to Chomutov | 3,756.14 mi (6,044.92 km) |
| South Portland to Chotebor | 3,868.32 mi (6,225.47 km) |
| South Portland to Chrudim | 3,865.38 mi (6,220.73 km) |
| South Portland to Decin | 3,776.27 mi (6,077.31 km) |
| South Portland to Dobris | 3,807.61 mi (6,127.76 km) |
| South Portland to Domazlice | 3,769.91 mi (6,067.08 km) |
| South Portland to Duchcov | 3,764.35 mi (6,058.14 km) |
| South Portland to Dvur Kralove nad Labem | 3,849.77 mi (6,195.60 km) |
| South Portland to Frenstat pod Radhostem | 3,972.60 mi (6,393.28 km) |
| South Portland to Frydek-Mistek | 3,973.09 mi (6,394.07 km) |
| South Portland to Frydlant nad Ostravici | 3,976.74 mi (6,399.94 km) |
