| Duncan to Santarem | 4,730.21 mi (7,612.54 km) |
| Duncan to Santiago do Cacem | 4,768.90 mi (7,674.80 km) |
| Duncan to Santo Andre | 4,765.42 mi (7,669.20 km) |
| Duncan to Santo Tirso | 4,673.79 mi (7,521.75 km) |
| Duncan to Sao Bras de Alportel | 4,836.74 mi (7,783.97 km) |
| Duncan to Sao Felix da Marinha | 4,675.97 mi (7,525.24 km) |
| Duncan to Sao Joao da Madeira | 4,686.50 mi (7,542.20 km) |
| Duncan to Sao Joao de Ver | 4,681.83 mi (7,534.67 km) |
| Duncan to Sao Mamede de Infesta | 4,671.82 mi (7,518.56 km) |
| Duncan to Sao Pedro do Sul | 4,710.78 mi (7,581.27 km) |
| Duncan to Satao | 4,726.79 mi (7,607.03 km) |
| Duncan to Seia | 4,738.23 mi (7,625.44 km) |
| Duncan to Senhora da Hora | 4,669.89 mi (7,515.47 km) |
| Duncan to Serpa | 4,824.03 mi (7,763.52 km) |
| Duncan to Serta | 4,739.66 mi (7,627.75 km) |
