| Tonawanda to Popovo | 4,888.69 mi (7,867.58 km) |
| Tonawanda to Provadia | 4,941.30 mi (7,952.25 km) |
| Tonawanda to Radnevo | 4,925.56 mi (7,926.92 km) |
| Tonawanda to Radomir | 4,799.31 mi (7,723.74 km) |
| Tonawanda to Rakitovo | 4,868.80 mi (7,835.57 km) |
| Tonawanda to Rakovski | 4,889.03 mi (7,868.14 km) |
| Tonawanda to Razgrad | 4,890.89 mi (7,871.13 km) |
| Tonawanda to Razlog | 4,849.29 mi (7,804.18 km) |
| Tonawanda to Ruse | 4,856.56 mi (7,815.88 km) |
| Tonawanda to Samokov | 4,832.36 mi (7,776.93 km) |
| Tonawanda to Sandanski | 4,856.24 mi (7,815.37 km) |
| Tonawanda to Sevlievo | 4,861.15 mi (7,823.27 km) |
| Tonawanda to Shumen | 4,917.99 mi (7,914.75 km) |
| Tonawanda to Silistra | 4,891.62 mi (7,872.31 km) |
| Tonawanda to Sliven | 4,923.11 mi (7,922.99 km) |
