| Portugalete to Rovinj | 832.28 mi (1,339.43 km) |
| Portugalete to Samobor | 935.90 mi (1,506.18 km) |
| Portugalete to Sesvete | 954.97 mi (1,536.88 km) |
| Portugalete to Sibenik | 945.69 mi (1,521.95 km) |
| Portugalete to Sinj | 982.85 mi (1,581.74 km) |
| Portugalete to Sisak | 966.61 mi (1,555.61 km) |
| Portugalete to Slatina | 1,031.12 mi (1,659.43 km) |
| Portugalete to Slavonski Brod | 1,046.01 mi (1,683.40 km) |
| Portugalete to Solin | 977.08 mi (1,572.46 km) |
| Portugalete to Split | 974.51 mi (1,568.32 km) |
| Portugalete to Sveti Ivan Zelina | 961.91 mi (1,548.05 km) |
| Portugalete to Trilj | 987.55 mi (1,589.31 km) |
| Portugalete to Trogir | 965.06 mi (1,553.12 km) |
| Portugalete to Umag | 828.05 mi (1,332.62 km) |
| Portugalete to Valpovo | 1,065.60 mi (1,714.91 km) |
