| Detroit (Michigan) to South Portland | 652.43 mi (1,049.98 km) |
| Chicago (Illinois) to South Portland | 889.87 mi (1,432.11 km) |
| Atlanta (Georgia) to South Portland | 1,019.96 mi (1,641.46 km) |
| St. Louis (Missouri) to South Portland | 1,091.13 mi (1,756.01 km) |
| Minneapolis (Minnesota) to South Portland | 1,136.22 mi (1,828.56 km) |
| Boston (Massachusetts) to South Portland | 99.19 mi (159.62 km) |
| Tampa (Florida) to South Portland | 1,273.99 mi (2,050.29 km) |
| Miami (Florida) to South Portland | 1,353.33 mi (2,177.98 km) |
| Dallas (Texas) to South Portland | 1,610.88 mi (2,592.46 km) |
| Houston (Texas) to South Portland | 1,676.77 mi (2,698.49 km) |
| Denver (Colorado) to South Portland | 1,791.02 mi (2,882.37 km) |
| Phoenix (Arizona) to South Portland | 2,334.26 mi (3,756.64 km) |
| Las Vegas (Nevada) to South Portland | 2,406.52 mi (3,872.92 km) |
| Seattle (Washington) to South Portland | 2,481.83 mi (3,994.11 km) |
| Portland (Oregon) to South Portland | 2,533.75 mi (4,077.67 km) |
| Riverside (California) to South Portland | 2,587.06 mi (4,163.48 km) |
| San Diego (California) to South Portland | 2,611.56 mi (4,202.90 km) |
| Los Angeles (California) to South Portland | 2,631.71 mi (4,235.33 km) |
| San Francisco (California) to South Portland | 2,716.97 mi (4,372.55 km) |
| Queens (New York) to South Portland | 268.05 mi (431.39 km) |
| New York (New York) to South Portland | 275.33 mi (443.10 km) |
| Brooklyn (New York) to South Portland | 278.48 mi (448.17 km) |
| Philadelphia (Pennsylvania) to South Portland | 353.28 mi (568.56 km) |
| Baltimore (Maryland) to South Portland | 443.11 mi (713.12 km) |
| Washington (District of Columbia) to South Portland | 477.90 mi (769.11 km) |
