| South Portland to Radviliskis | 3,943.92 mi (6,347.12 km) |
| South Portland to Raseiniai | 3,944.61 mi (6,348.24 km) |
| South Portland to Rietavas | 3,892.46 mi (6,264.31 km) |
| South Portland to Rokiskis | 4,005.30 mi (6,445.91 km) |
| South Portland to Sakiai | 3,957.05 mi (6,368.26 km) |
| South Portland to Salcininkai | 4,059.43 mi (6,533.01 km) |
| South Portland to Siauliai | 3,931.45 mi (6,327.05 km) |
| South Portland to Silale | 3,908.94 mi (6,290.84 km) |
| South Portland to Silute | 3,889.69 mi (6,259.85 km) |
| South Portland to Sirvintos | 4,018.90 mi (6,467.79 km) |
| South Portland to Skuodas | 3,860.35 mi (6,212.64 km) |
| South Portland to Svencionys | 4,054.95 mi (6,525.82 km) |
| South Portland to Taurage | 3,920.56 mi (6,309.53 km) |
| South Portland to Telsiai | 3,894.01 mi (6,266.80 km) |
| South Portland to Trakai | 4,032.45 mi (6,489.61 km) |
