| North Tonawanda to Popovo | 4,886.51 mi (7,864.09 km) |
| North Tonawanda to Provadia | 4,939.11 mi (7,948.73 km) |
| North Tonawanda to Radnevo | 4,923.41 mi (7,923.46 km) |
| North Tonawanda to Radomir | 4,797.19 mi (7,720.33 km) |
| North Tonawanda to Rakitovo | 4,866.67 mi (7,832.16 km) |
| North Tonawanda to Rakovski | 4,886.90 mi (7,864.70 km) |
| North Tonawanda to Razgrad | 4,888.71 mi (7,867.62 km) |
| North Tonawanda to Razlog | 4,847.18 mi (7,800.78 km) |
| North Tonawanda to Ruse | 4,854.38 mi (7,812.38 km) |
| North Tonawanda to Samokov | 4,830.24 mi (7,773.51 km) |
| North Tonawanda to Sandanski | 4,854.14 mi (7,811.98 km) |
| North Tonawanda to Sevlievo | 4,859.00 mi (7,819.80 km) |
| North Tonawanda to Shumen | 4,915.81 mi (7,911.24 km) |
| North Tonawanda to Silistra | 4,889.42 mi (7,868.77 km) |
| North Tonawanda to Sliven | 4,920.95 mi (7,919.51 km) |
