| National City to Duluth (Minnesota) | 1,634.33 mi (2,630.19 km) |
| National City to Dumas (Texas) | 890.93 mi (1,433.81 km) |
| National City to Dumont (New Jersey) | 2,426.55 mi (3,905.16 km) |
| National City to Duncan (Oklahoma) | 1,109.46 mi (1,785.50 km) |
| National City to Duncanville (Texas) | 1,172.45 mi (1,886.87 km) |
| National City to Dundalk (Maryland) | 2,296.21 mi (3,695.40 km) |
| National City to Dunedin (Florida) | 2,061.70 mi (3,317.99 km) |
| National City to Dunkirk (New York) | 2,156.16 mi (3,470.01 km) |
| National City to Dunmore (Pennsylvania) | 2,342.80 mi (3,770.37 km) |
| National City to Dunwoody (Georgia) | 1,887.29 mi (3,037.30 km) |
| National City to Durango (Colorado) | 610.76 mi (982.93 km) |
| National City to Durant (Oklahoma) | 1,196.82 mi (1,926.09 km) |
| National City to Durham (North Carolina) | 2,177.70 mi (3,504.67 km) |
| National City to Dyer (Indiana) | 1,731.02 mi (2,785.80 km) |
| National City to Dyersburg (Tennessee) | 1,592.86 mi (2,563.46 km) |
