| South Portland to Camarillo (California) | 2,659.29 mi (4,279.72 km) |
| South Portland to Camas (Washington) | 2,522.33 mi (4,059.29 km) |
| South Portland to Cambridge (Maryland) | 462.41 mi (744.18 km) |
| South Portland to Cambridge (Massachusetts) | 96.30 mi (154.99 km) |
| South Portland to Camden (Arkansas) | 1,395.89 mi (2,246.47 km) |
| South Portland to Camden (New Jersey) | 355.95 mi (572.84 km) |
| South Portland to Cameron Park (California) | 2,618.49 mi (4,214.05 km) |
| South Portland to Camp Pendleton South (California) | 2,611.10 mi (4,202.16 km) |
| South Portland to Camp Springs (Maryland) | 479.20 mi (771.20 km) |
| South Portland to Camp Verde (Arizona) | 2,289.04 mi (3,683.85 km) |
| South Portland to Campbell (California) | 2,707.05 mi (4,356.57 km) |
| South Portland to Campbellsville (Kentucky) | 900.86 mi (1,449.80 km) |
| South Portland to Campton Hills (Illinois) | 924.54 mi (1,487.91 km) |
| South Portland to Canby (Oregon) | 2,540.79 mi (4,089.01 km) |
| South Portland to Candelaria (Puerto Rico) | 1,759.04 mi (2,830.90 km) |
