| Olecko to Castelo Branco | 1,702.54 mi (2,739.98 km) |
| Olecko to Castro Daire | 1,666.64 mi (2,682.20 km) |
| Olecko to Celorico de Basto | 1,646.47 mi (2,649.73 km) |
| Olecko to Chamusca | 1,762.29 mi (2,836.13 km) |
| Olecko to Chaves | 1,609.64 mi (2,590.47 km) |
| Olecko to Cinfaes | 1,664.82 mi (2,679.28 km) |
| Olecko to Coimbra | 1,718.35 mi (2,765.42 km) |
| Olecko to Condeixa-a-Nova | 1,725.58 mi (2,777.05 km) |
| Olecko to Corroios | 1,823.70 mi (2,934.96 km) |
| Olecko to Coruche | 1,783.35 mi (2,870.03 km) |
| Olecko to Costa de Caparica | 1,825.39 mi (2,937.68 km) |
| Olecko to Covilha | 1,679.80 mi (2,703.38 km) |
| Olecko to Eiras | 1,716.66 mi (2,762.70 km) |
| Olecko to Elvas | 1,736.81 mi (2,795.12 km) |
| Olecko to Entroncamento | 1,756.06 mi (2,826.10 km) |
