| Smithville to Popovo | 5,631.09 mi (9,062.36 km) |
| Smithville to Provadia | 5,679.90 mi (9,140.92 km) |
| Smithville to Radnevo | 5,674.62 mi (9,132.42 km) |
| Smithville to Radomir | 5,558.00 mi (8,944.73 km) |
| Smithville to Rakitovo | 5,626.33 mi (9,054.70 km) |
| Smithville to Rakovski | 5,641.78 mi (9,079.57 km) |
| Smithville to Razgrad | 5,631.21 mi (9,062.56 km) |
| Smithville to Razlog | 5,609.54 mi (9,027.68 km) |
| Smithville to Ruse | 5,597.49 mi (9,008.29 km) |
| Smithville to Samokov | 5,589.99 mi (8,996.21 km) |
| Smithville to Sandanski | 5,618.72 mi (9,042.45 km) |
| Smithville to Sevlievo | 5,609.52 mi (9,027.64 km) |
| Smithville to Shumen | 5,658.03 mi (9,105.72 km) |
| Smithville to Silistra | 5,625.86 mi (9,053.94 km) |
| Smithville to Sliven | 5,668.65 mi (9,122.82 km) |
