| Mason City to Deville-les-Rouen | 4,215.32 mi (6,783.90 km) |
| Mason City to Dieppe | 4,199.22 mi (6,757.99 km) |
| Mason City to Digne-les-Bains | 4,632.54 mi (7,455.36 km) |
| Mason City to Dijon | 4,449.76 mi (7,161.19 km) |
| Mason City to Dinan | 4,135.77 mi (6,655.87 km) |
| Mason City to Dinard | 4,128.77 mi (6,644.61 km) |
| Mason City to Divonne-les-Bains | 4,532.28 mi (7,294.01 km) |
| Mason City to Dole | 4,476.82 mi (7,204.74 km) |
| Mason City to Dombasle-sur-Meurthe | 4,444.76 mi (7,153.14 km) |
| Mason City to Domerat | 4,394.38 mi (7,072.07 km) |
| Mason City to Domont | 4,280.13 mi (6,888.21 km) |
| Mason City to Douai | 4,255.21 mi (6,848.10 km) |
| Mason City to Douarnenez | 4,060.11 mi (6,534.12 km) |
| Mason City to Douchy-les-Mines | 4,269.33 mi (6,870.82 km) |
| Mason City to Dourdan | 4,287.89 mi (6,900.68 km) |
