| Rancho Santa Margarita to Bonham (Texas) | 1,229.70 mi (1,979.01 km) |
| Rancho Santa Margarita to Bonita (California) | 74.47 mi (119.84 km) |
| Rancho Santa Margarita to Bonita Springs (Florida) | 2,189.66 mi (3,523.92 km) |
| Rancho Santa Margarita to Bonney Lake (Washington) | 965.98 mi (1,554.60 km) |
| Rancho Santa Margarita to Boone (Iowa) | 1,412.90 mi (2,273.84 km) |
| Rancho Santa Margarita to Boone (North Carolina) | 2,031.82 mi (3,269.89 km) |
| Rancho Santa Margarita to Borger (Texas) | 930.20 mi (1,497.02 km) |
| Rancho Santa Margarita to Bossier City (Louisiana) | 1,384.60 mi (2,228.30 km) |
| Rancho Santa Margarita to Boston (Massachusetts) | 2,570.08 mi (4,136.14 km) |
| Rancho Santa Margarita to Bostonia (California) | 67.60 mi (108.79 km) |
| Rancho Santa Margarita to Bothell (Washington) | 1,005.96 mi (1,618.93 km) |
| Rancho Santa Margarita to Bothell East (Washington) | 1,007.90 mi (1,622.06 km) |
| Rancho Santa Margarita to Bothell West (Washington) | 1,008.54 mi (1,623.08 km) |
| Rancho Santa Margarita to Boulder (Colorado) | 812.03 mi (1,306.84 km) |
| Rancho Santa Margarita to Boulder City (Nevada) | 215.22 mi (346.37 km) |
