| Rancho Santa Margarita to Brown Deer (Wisconsin) | 1,722.76 mi (2,772.52 km) |
| Rancho Santa Margarita to Brownsburg (Indiana) | 1,771.10 mi (2,850.31 km) |
| Rancho Santa Margarita to Brownsville (Florida) | 2,292.32 mi (3,689.14 km) |
| Rancho Santa Margarita to Brownsville (Texas) | 1,314.54 mi (2,115.55 km) |
| Rancho Santa Margarita to Brownwood (Texas) | 1,089.66 mi (1,753.64 km) |
| Rancho Santa Margarita to Brunswick (Georgia) | 2,104.03 mi (3,386.11 km) |
| Rancho Santa Margarita to Brunswick (Ohio) | 2,016.59 mi (3,245.39 km) |
| Rancho Santa Margarita to Brushy Creek (Texas) | 1,180.64 mi (1,900.06 km) |
| Rancho Santa Margarita to Bryan (Texas) | 1,255.76 mi (2,020.95 km) |
| Rancho Santa Margarita to Bryant (Arkansas) | 1,433.99 mi (2,307.78 km) |
| Rancho Santa Margarita to Bryn Mawr-Skyway (Washington) | 987.88 mi (1,589.83 km) |
| Rancho Santa Margarita to Buckeye (Arizona) | 285.74 mi (459.86 km) |
| Rancho Santa Margarita to Buckhall (Virginia) | 2,248.59 mi (3,618.75 km) |
| Rancho Santa Margarita to Bucyrus (Ohio) | 1,954.83 mi (3,145.99 km) |
| Rancho Santa Margarita to Buda (Texas) | 1,182.87 mi (1,903.65 km) |
