| Johnston to Cascais | 4,264.93 mi (6,863.75 km) |
| Johnston to Castelo Branco | 4,309.74 mi (6,935.85 km) |
| Johnston to Castro Daire | 4,250.35 mi (6,840.28 km) |
| Johnston to Celorico de Basto | 4,229.73 mi (6,807.10 km) |
| Johnston to Chamusca | 4,283.05 mi (6,892.90 km) |
| Johnston to Chaves | 4,239.91 mi (6,823.48 km) |
| Johnston to Cinfaes | 4,234.19 mi (6,814.26 km) |
| Johnston to Coimbra | 4,253.62 mi (6,845.55 km) |
| Johnston to Condeixa-a-Nova | 4,253.93 mi (6,846.05 km) |
| Johnston to Corroios | 4,280.20 mi (6,888.31 km) |
| Johnston to Coruche | 4,295.73 mi (6,913.31 km) |
| Johnston to Costa de Caparica | 4,275.23 mi (6,880.32 km) |
| Johnston to Covilha | 4,292.34 mi (6,907.86 km) |
| Johnston to Eiras | 4,252.71 mi (6,844.08 km) |
| Johnston to Elvas | 4,361.20 mi (7,018.67 km) |
