| Mason City to Dendermonde | 4,265.97 mi (6,865.42 km) |
| Mason City to Dessel | 4,294.15 mi (6,910.77 km) |
| Mason City to Destelbergen | 4,254.60 mi (6,847.11 km) |
| Mason City to Deurne | 4,271.33 mi (6,874.03 km) |
| Mason City to Diepenbeek | 4,317.85 mi (6,948.91 km) |
| Mason City to Diest | 4,301.76 mi (6,923.02 km) |
| Mason City to Diksmuide | 4,221.76 mi (6,794.26 km) |
| Mason City to Dilbeek | 4,279.23 mi (6,886.75 km) |
| Mason City to Dinant | 4,325.73 mi (6,961.58 km) |
| Mason City to Dison | 4,344.92 mi (6,992.47 km) |
| Mason City to Dour | 4,279.56 mi (6,887.29 km) |
| Mason City to Drongen | 4,249.83 mi (6,839.44 km) |
| Mason City to Duffel | 4,278.18 mi (6,885.07 km) |
| Mason City to Durbuy | 4,341.61 mi (6,987.15 km) |
| Mason City to Ecaussinnes-Lalaing | 4,287.40 mi (6,899.90 km) |
