| South Portland to Ayamonte | 3,258.68 mi (5,244.34 km) |
| South Portland to Azcoitia | 3,311.51 mi (5,329.36 km) |
| South Portland to Azpeitia | 3,313.49 mi (5,332.55 km) |
| South Portland to Azuqueca de Henares | 3,347.04 mi (5,386.55 km) |
| South Portland to Badajoz | 3,224.80 mi (5,189.81 km) |
| South Portland to Badalona | 3,573.10 mi (5,750.35 km) |
| South Portland to Baena | 3,393.17 mi (5,460.78 km) |
| South Portland to Baeza | 3,421.48 mi (5,506.34 km) |
| South Portland to Bailen | 3,403.85 mi (5,477.96 km) |
| South Portland to Balaguer | 3,496.40 mi (5,626.91 km) |
| South Portland to Banolas | 3,574.83 mi (5,753.14 km) |
| South Portland to Baranain | 3,352.18 mi (5,394.81 km) |
| South Portland to Barbadanes | 3,078.60 mi (4,954.53 km) |
| South Portland to Barbastro | 3,457.58 mi (5,564.44 km) |
| South Portland to Barcelona | 3,572.20 mi (5,748.90 km) |
