| Rancho Santa Margarita to Arcata (California) | 613.12 mi (986.73 km) |
| Rancho Santa Margarita to Archdale (North Carolina) | 2,128.97 mi (3,426.24 km) |
| Rancho Santa Margarita to Arden-Arcade (California) | 403.09 mi (648.71 km) |
| Rancho Santa Margarita to Ardmore (Oklahoma) | 1,172.59 mi (1,887.11 km) |
| Rancho Santa Margarita to Ardmore (Pennsylvania) | 2,358.40 mi (3,795.47 km) |
| Rancho Santa Margarita to Arecibo (Puerto Rico) | 3,291.42 mi (5,297.02 km) |
| Rancho Santa Margarita to Arkadelphia (Arkansas) | 1,403.90 mi (2,259.36 km) |
| Rancho Santa Margarita to Arkansas City (Kansas) | 1,180.29 mi (1,899.50 km) |
| Rancho Santa Margarita to Arlington (Tennessee) | 1,590.19 mi (2,559.17 km) |
| Rancho Santa Margarita to Arlington (Texas) | 1,183.97 mi (1,905.42 km) |
| Rancho Santa Margarita to Arlington (Virginia) | 2,266.54 mi (3,647.64 km) |
| Rancho Santa Margarita to Arlington (Washington) | 1,031.68 mi (1,660.33 km) |
| Rancho Santa Margarita to Arlington Heights (Illinois) | 1,707.69 mi (2,748.26 km) |
| Rancho Santa Margarita to Arnold (Maryland) | 2,298.19 mi (3,698.57 km) |
| Rancho Santa Margarita to Arnold (Missouri) | 1,550.91 mi (2,495.95 km) |
