| Fostoria to Popovo | 5,145.39 mi (8,280.70 km) |
| Fostoria to Provadia | 5,197.42 mi (8,364.44 km) |
| Fostoria to Radnevo | 5,183.35 mi (8,341.79 km) |
| Fostoria to Radomir | 5,058.47 mi (8,140.82 km) |
| Fostoria to Rakitovo | 5,127.83 mi (8,252.45 km) |
| Fostoria to Rakovski | 5,147.37 mi (8,283.88 km) |
| Fostoria to Razgrad | 5,147.26 mi (8,283.71 km) |
| Fostoria to Razlog | 5,108.71 mi (8,221.68 km) |
| Fostoria to Ruse | 5,113.00 mi (8,228.58 km) |
| Fostoria to Samokov | 5,091.39 mi (8,193.79 km) |
| Fostoria to Sandanski | 5,115.99 mi (8,233.39 km) |
| Fostoria to Sevlievo | 5,118.78 mi (8,237.88 km) |
| Fostoria to Shumen | 5,174.33 mi (8,327.29 km) |
| Fostoria to Silistra | 5,146.98 mi (8,283.26 km) |
| Fostoria to Sliven | 5,180.35 mi (8,336.96 km) |
