| Mason City to Bicaz | 5,195.18 mi (8,360.83 km) |
| Mason City to Bistrita | 5,133.88 mi (8,262.19 km) |
| Mason City to Blaj | 5,164.23 mi (8,311.03 km) |
| Mason City to Bocsa | 5,132.52 mi (8,259.99 km) |
| Mason City to Boldesti-Scaeni | 5,291.30 mi (8,515.52 km) |
| Mason City to Bolintin Vale | 5,312.96 mi (8,550.37 km) |
| Mason City to Borsa | 5,112.26 mi (8,227.39 km) |
| Mason City to Botosani | 5,169.32 mi (8,319.22 km) |
| Mason City to Brad | 5,130.12 mi (8,256.13 km) |
| Mason City to Bragadiru | 5,323.98 mi (8,568.12 km) |
| Mason City to Braila | 5,339.50 mi (8,593.10 km) |
| Mason City to Brasov | 5,244.94 mi (8,440.92 km) |
| Mason City to Breaza | 5,271.33 mi (8,483.39 km) |
| Mason City to Bucharest | 5,324.91 mi (8,569.62 km) |
| Mason City to Buftea | 5,312.76 mi (8,550.07 km) |
