| Gahanna to Cascais | 3,805.95 mi (6,125.08 km) |
| Gahanna to Castelo Branco | 3,863.29 mi (6,217.36 km) |
| Gahanna to Castro Daire | 3,809.85 mi (6,131.36 km) |
| Gahanna to Celorico de Basto | 3,792.33 mi (6,103.16 km) |
| Gahanna to Chamusca | 3,830.80 mi (6,165.08 km) |
| Gahanna to Chaves | 3,806.45 mi (6,125.89 km) |
| Gahanna to Cinfaes | 3,794.48 mi (6,106.62 km) |
| Gahanna to Coimbra | 3,807.13 mi (6,126.99 km) |
| Gahanna to Condeixa-a-Nova | 3,806.62 mi (6,126.17 km) |
| Gahanna to Corroios | 3,821.41 mi (6,149.97 km) |
| Gahanna to Coruche | 3,840.85 mi (6,181.25 km) |
| Gahanna to Costa de Caparica | 3,816.40 mi (6,141.90 km) |
| Gahanna to Covilha | 3,848.95 mi (6,194.29 km) |
| Gahanna to Eiras | 3,806.44 mi (6,125.88 km) |
| Gahanna to Elvas | 3,909.66 mi (6,291.99 km) |
