the question you pose is what is the best low tier program

I too am going to say AS. Simply because AS as it stands now has 2 tiers and is attainable with less miles than most other low tier frequent flyer choices and upgrades arent rare or unheard of for MVP on a lot of routes. You also get 50% bonus RDMS...again unheard of on most silver/low tier status


What is the best program for you the OP may not be AS but IMO is the best "low tier" program