| Sammamish to Cascais | 5,180.08 mi (8,336.53 km) |
| Sammamish to Castelo Branco | 5,186.36 mi (8,346.65 km) |
| Sammamish to Castro Daire | 5,114.15 mi (8,230.44 km) |
| Sammamish to Celorico de Basto | 5,086.30 mi (8,185.61 km) |
| Sammamish to Chamusca | 5,177.83 mi (8,332.91 km) |
| Sammamish to Chaves | 5,084.85 mi (8,183.27 km) |
| Sammamish to Cinfaes | 5,096.86 mi (8,202.61 km) |
| Sammamish to Coimbra | 5,134.00 mi (8,262.38 km) |
| Sammamish to Condeixa-a-Nova | 5,136.60 mi (8,266.56 km) |
| Sammamish to Corroios | 5,193.82 mi (8,358.65 km) |
| Sammamish to Coruche | 5,197.21 mi (8,364.10 km) |
| Sammamish to Costa de Caparica | 5,189.29 mi (8,351.36 km) |
| Sammamish to Covilha | 5,161.47 mi (8,306.58 km) |
| Sammamish to Eiras | 5,132.54 mi (8,260.02 km) |
| Sammamish to Elvas | 5,249.03 mi (8,447.50 km) |
