| Seabrook to Popovo | 4,996.20 mi (8,040.60 km) |
| Seabrook to Provadia | 5,051.00 mi (8,128.80 km) |
| Seabrook to Radnevo | 5,028.21 mi (8,092.12 km) |
| Seabrook to Radomir | 4,895.82 mi (7,879.06 km) |
| Seabrook to Rakitovo | 4,965.70 mi (7,991.53 km) |
| Seabrook to Rakovski | 4,989.30 mi (8,029.50 km) |
| Seabrook to Razgrad | 4,999.79 mi (8,046.39 km) |
| Seabrook to Razlog | 4,944.30 mi (7,957.09 km) |
| Seabrook to Ruse | 4,965.29 mi (7,990.86 km) |
| Seabrook to Samokov | 4,929.44 mi (7,933.16 km) |
| Seabrook to Sandanski | 4,949.52 mi (7,965.48 km) |
| Seabrook to Sevlievo | 4,964.72 mi (7,989.95 km) |
| Seabrook to Shumen | 5,026.90 mi (8,090.01 km) |
| Seabrook to Silistra | 5,004.55 mi (8,054.04 km) |
| Seabrook to Sliven | 5,028.24 mi (8,092.16 km) |
