| Mason City to Dallas (Oregon) | 1,492.17 mi (2,401.42 km) |
| Mason City to Dallas (Texas) | 741.19 mi (1,192.82 km) |
| Mason City to Dalton (Georgia) | 727.64 mi (1,171.02 km) |
| Mason City to Daly City (California) | 1,576.49 mi (2,537.12 km) |
| Mason City to Damascus (Maryland) | 872.36 mi (1,403.92 km) |
| Mason City to Damascus (Oregon) | 1,446.89 mi (2,328.55 km) |
| Mason City to Dana Point (California) | 1,479.27 mi (2,380.66 km) |
| Mason City to Danbury (Connecticut) | 1,013.42 mi (1,630.95 km) |
| Mason City to Dania Beach (Florida) | 1,390.36 mi (2,237.57 km) |
| Mason City to Danville (California) | 1,548.01 mi (2,491.29 km) |
| Mason City to Danville (Illinois) | 355.39 mi (571.95 km) |
| Mason City to Danville (Indiana) | 418.33 mi (673.23 km) |
| Mason City to Danville (Kentucky) | 583.56 mi (939.16 km) |
| Mason City to Danville (Virginia) | 858.96 mi (1,382.36 km) |
| Mason City to Daphne (Alabama) | 913.24 mi (1,469.73 km) |
