| Mason City to Ilawa | 4,662.91 mi (7,504.23 km) |
| Mason City to Imielin | 4,817.31 mi (7,752.72 km) |
| Mason City to Inowroclaw | 4,661.23 mi (7,501.53 km) |
| Mason City to Janow Lubelski | 4,888.59 mi (7,867.42 km) |
| Mason City to Jarocin | 4,676.22 mi (7,525.64 km) |
| Mason City to Jaroslaw | 4,931.33 mi (7,936.21 km) |
| Mason City to Jasien | 4,598.02 mi (7,399.79 km) |
| Mason City to Jaslo | 4,907.26 mi (7,897.47 km) |
| Mason City to Jastrzebie-Zdroj | 4,805.82 mi (7,734.23 km) |
| Mason City to Jawor | 4,677.35 mi (7,527.46 km) |
| Mason City to Jaworzno | 4,815.59 mi (7,749.95 km) |
| Mason City to Jedrzejow | 4,827.36 mi (7,768.88 km) |
| Mason City to Jelcz-Laskowice | 4,714.54 mi (7,587.33 km) |
| Mason City to Jelenia Gora | 4,669.01 mi (7,514.05 km) |
| Mason City to Jozefoslaw | 4,779.12 mi (7,691.25 km) |
