<prompt> Human: Hi, I will be working in a hospital in Maryland for the next year or so, but my family and my whole life is back in Chicago. I want to fly back to Chicago as often as possible at least 8 round trips, but dont know much about flying frugally. Should I set up some kind of frequent flyer miles account with a single airline and possibly accrue frequent flying benefits or should I just hunt for the cheapest tickets with any airline each time I have to fly? I would greatly appreciate any advice.Thank you for your time and wisdom.  <response>: Stick with one airline; ORD is a huge United hub, if that helps anything. 