Flank steak may not be the first cut you think of when buying steaks to grill. If you're on a budget though, thin, flat cuts like flank steaks or skirt steaks are often cheaper than thick steaks ...
Flat iron steak and flank steak may come from opposite ends ... make sure to check out Chowhound's guide to pan-searing first! This is a thin cut of steak, so it won't take very long to reach ...