| Port Huron to Bicaz | 4,848.96 mi (7,803.66 km) |
| Port Huron to Bistrita | 4,783.00 mi (7,697.49 km) |
| Port Huron to Blaj | 4,806.07 mi (7,734.62 km) |
| Port Huron to Bocsa | 4,762.20 mi (7,664.02 km) |
| Port Huron to Boldesti-Scaeni | 4,934.98 mi (7,942.08 km) |
| Port Huron to Bolintin Vale | 4,952.61 mi (7,970.45 km) |
| Port Huron to Borsa | 4,764.81 mi (7,668.21 km) |
| Port Huron to Botosani | 4,829.77 mi (7,772.77 km) |
| Port Huron to Brad | 4,767.65 mi (7,672.80 km) |
| Port Huron to Bragadiru | 4,964.07 mi (7,988.90 km) |
| Port Huron to Braila | 4,991.80 mi (8,033.53 km) |
| Port Huron to Brasov | 4,890.38 mi (7,870.30 km) |
| Port Huron to Breaza | 4,914.44 mi (7,909.02 km) |
| Port Huron to Bucharest | 4,965.80 mi (7,991.68 km) |
| Port Huron to Buftea | 4,953.77 mi (7,972.33 km) |
