| Donostia to Corinth (Mississippi) | 4,462.93 mi (7,182.39 km) |
| Donostia to Corinth (Texas) | 4,924.42 mi (7,925.10 km) |
| Donostia to Cornelius (North Carolina) | 4,089.64 mi (6,581.64 km) |
| Donostia to Cornelius (Oregon) | 5,314.26 mi (8,552.47 km) |
| Donostia to Corning (New York) | 3,674.41 mi (5,913.40 km) |
| Donostia to Corona (California) | 5,736.70 mi (9,232.33 km) |
| Donostia to Coronado (California) | 5,783.23 mi (9,307.21 km) |
| Donostia to Corpus Christi (Texas) | 5,182.83 mi (8,340.96 km) |
| Donostia to Corsicana (Texas) | 4,944.87 mi (7,957.99 km) |
| Donostia to Cortland (New York) | 3,620.12 mi (5,826.02 km) |
| Donostia to Corvallis (Oregon) | 5,371.82 mi (8,645.10 km) |
| Donostia to Coshocton (Ohio) | 3,955.18 mi (6,365.25 km) |
| Donostia to Costa Mesa (California) | 5,760.04 mi (9,269.88 km) |
| Donostia to Coto de Caza (California) | 5,751.28 mi (9,255.80 km) |
| Donostia to Cottage Grove (Minnesota) | 4,258.81 mi (6,853.89 km) |
