| Porthcawl to Cloverly (Maryland) | 3,508.57 mi (5,646.49 km) |
| Porthcawl to Clovis (California) | 5,216.06 mi (8,394.43 km) |
| Porthcawl to Clovis (New Mexico) | 4,770.47 mi (7,677.33 km) |
| Porthcawl to Clute (Texas) | 4,746.12 mi (7,638.14 km) |
| Porthcawl to Coachella (California) | 5,274.88 mi (8,489.09 km) |
| Porthcawl to Coalinga (California) | 5,275.31 mi (8,489.79 km) |
| Porthcawl to Coamo (Puerto Rico) | 4,078.76 mi (6,564.14 km) |
| Porthcawl to Coatesville (Pennsylvania) | 3,421.50 mi (5,506.37 km) |
| Porthcawl to Cockeysville (Maryland) | 3,476.86 mi (5,595.47 km) |
| Porthcawl to Cocoa (Florida) | 4,170.96 mi (6,712.51 km) |
| Porthcawl to Cocoa Beach (Florida) | 4,167.45 mi (6,706.86 km) |
| Porthcawl to Coconut Creek (Florida) | 4,250.73 mi (6,840.88 km) |
| Porthcawl to Coeur d'Alene (Idaho) | 4,527.50 mi (7,286.30 km) |
| Porthcawl to Cohoes (New York) | 3,217.26 mi (5,177.68 km) |
| Porthcawl to Cold Springs (Nevada) | 5,064.16 mi (8,149.97 km) |
