| Donostia to Caño Martin Peña (Puerto Rico) | 4,059.51 mi (6,533.15 km) |
| Donostia to Cañon City (Colorado) | 5,028.59 mi (8,092.74 km) |
| Donostia to Canóvanas (Puerto Rico) | 4,054.73 mi (6,525.46 km) |
| Donostia to Canton (Georgia) | 4,306.09 mi (6,929.98 km) |
| Donostia to Canton (Illinois) | 4,304.50 mi (6,927.42 km) |
| Donostia to Canton (Mississippi) | 4,630.47 mi (7,452.01 km) |
| Donostia to Canton (Ohio) | 3,914.01 mi (6,298.99 km) |
| Donostia to Canyon (Texas) | 5,051.33 mi (8,129.34 km) |
| Donostia to Canyon Lake (California) | 5,734.16 mi (9,228.23 km) |
| Donostia to Canyon Lake (Texas) | 5,124.87 mi (8,247.67 km) |
| Donostia to Cape Coral (Florida) | 4,500.69 mi (7,243.16 km) |
| Donostia to Cape Girardeau (Missouri) | 4,413.51 mi (7,102.85 km) |
| Donostia to Carbondale (Illinois) | 4,381.95 mi (7,052.07 km) |
| Donostia to Carlisle (Pennsylvania) | 3,746.80 mi (6,029.89 km) |
| Donostia to Carlsbad (California) | 5,764.16 mi (9,276.52 km) |
