| Cities | Distance |
|---|---|
| Frauenfeld to Popovo | 886.60 mi (1,426.84 km) |
| Frauenfeld to Provadia | 946.16 mi (1,522.71 km) |
| Frauenfeld to Radnevo | 906.33 mi (1,458.60 km) |
| Frauenfeld to Radomir | 766.38 mi (1,233.36 km) |
| Frauenfeld to Rakitovo | 836.27 mi (1,345.84 km) |
| Frauenfeld to Rakovski | 863.84 mi (1,390.21 km) |
| Frauenfeld to Razgrad | 894.23 mi (1,439.13 km) |
| Frauenfeld to Razlog | 813.50 mi (1,309.20 km) |
| Frauenfeld to Ruse | 860.42 mi (1,384.71 km) |
| Frauenfeld to Samokov | 800.37 mi (1,288.07 km) |
| Frauenfeld to Sandanski | 817.98 mi (1,316.41 km) |
| Frauenfeld to Sevlievo | 845.85 mi (1,361.27 km) |
| Frauenfeld to Shumen | 920.43 mi (1,481.29 km) |
| Frauenfeld to Silistra | 912.73 mi (1,468.90 km) |
| Frauenfeld to Sliven | 911.59 mi (1,467.07 km) |