| Mason City to Popovo | 5,385.87 mi (8,667.71 km) |
| Mason City to Provadia | 5,433.61 mi (8,744.55 km) |
| Mason City to Radnevo | 5,431.12 mi (8,740.55 km) |
| Mason City to Radomir | 5,317.56 mi (8,557.78 km) |
| Mason City to Rakitovo | 5,385.39 mi (8,666.95 km) |
| Mason City to Rakovski | 5,399.40 mi (8,689.49 km) |
| Mason City to Razgrad | 5,385.45 mi (8,667.05 km) |
| Mason City to Razlog | 5,369.47 mi (8,641.33 km) |
| Mason City to Ruse | 5,351.95 mi (8,613.14 km) |
| Mason City to Samokov | 5,349.16 mi (8,608.63 km) |
| Mason City to Sandanski | 5,379.34 mi (8,657.21 km) |
| Mason City to Sevlievo | 5,365.95 mi (8,635.66 km) |
| Mason City to Shumen | 5,412.15 mi (8,710.01 km) |
| Mason City to Silistra | 5,378.58 mi (8,656.00 km) |
| Mason City to Sliven | 5,424.20 mi (8,729.40 km) |
