| Mason City to Ukiah (California) | 1,576.96 mi (2,537.88 km) |
| Mason City to Union (Missouri) | 345.18 mi (555.52 km) |
| Mason City to Union City (California) | 1,556.11 mi (2,504.31 km) |
| Mason City to Union City (Georgia) | 808.12 mi (1,300.55 km) |
| Mason City to Union City (New Jersey) | 996.20 mi (1,603.22 km) |
| Mason City to Union City (Tennessee) | 513.94 mi (827.10 km) |
| Mason City to Union Hill-Novelty Hill (Washington) | 1,424.02 mi (2,291.75 km) |
| Mason City to Union Park (Florida) | 1,207.19 mi (1,942.78 km) |
| Mason City to Uniondale (New York) | 1,019.17 mi (1,640.20 km) |
| Mason City to Universal City (Texas) | 980.97 mi (1,578.72 km) |
| Mason City to University (Florida) | 1,201.82 mi (1,934.15 km) |
| Mason City to University City (Missouri) | 344.00 mi (553.61 km) |
| Mason City to University Heights (Ohio) | 606.23 mi (975.63 km) |
| Mason City to University of California-Santa Barbara (California) | 1,548.90 mi (2,492.71 km) |
| Mason City to University Park (Texas) | 737.75 mi (1,187.29 km) |
