| Portage to Brown Deer (Wisconsin) | 138.54 mi (222.97 km) |
| Portage to Brownsburg (Indiana) | 168.63 mi (271.39 km) |
| Portage to Brownsville (Florida) | 1,171.71 mi (1,885.69 km) |
| Portage to Brownsville (Texas) | 1,306.30 mi (2,102.28 km) |
| Portage to Brownwood (Texas) | 1,032.60 mi (1,661.80 km) |
| Portage to Brunswick (Georgia) | 796.89 mi (1,282.47 km) |
| Portage to Brunswick (Ohio) | 205.29 mi (330.38 km) |
| Portage to Brushy Creek (Texas) | 1,050.82 mi (1,691.13 km) |
| Portage to Bryan (Texas) | 995.69 mi (1,602.40 km) |
| Portage to Bryant (Arkansas) | 643.10 mi (1,034.97 km) |
| Portage to Bryn Mawr-Skyway (Washington) | 1,814.58 mi (2,920.28 km) |
| Portage to Buckeye (Arizona) | 1,587.45 mi (2,554.76 km) |
| Portage to Buckhall (Virginia) | 490.53 mi (789.43 km) |
| Portage to Bucyrus (Ohio) | 166.26 mi (267.57 km) |
| Portage to Buda (Texas) | 1,079.08 mi (1,736.62 km) |
