I joined NW WP in the mid 1990s because back in the day, my family was very loyal to KLM for our flights to DEL / CCU. When I moved to ATL for school, I switched to DL because it made sense to be a DL frequent flyer when you live in ATL. Up until now, I was never focused on status - I would just wait to get enough miles in order to be able to get a free domestic coach ticket to some random city for Spring Break or to go to a concert.

Fast forward to today... I'm now working in NYC and have access to multiple airlines. I don't really travel for business, but manage to log at least 25k miles a year (if not 50k) in leisure travel. I don't really care about getting free tix anymore, but would love the ability to get upgrades to F or Biz every now and then when flying out to Vegas for the weekend or to PR for a winter getaway.

I have been considering switching to another program, but in reality, I don't know whether it is worth switching. I despise AA with a passion - I have never had a flight be on time with AA and I find AA aircraft to be disgusting and ghetto. I don't do Jersey, so CO is out of the question.

Note - a good chunk of my miles come a few weekenders in europe each year and an annual trip to India. Last year I flew the AI nonstop but would easily take AF or KL or BA to do a stopover and see my friends in Europe.

What do you think? Stay with DL or switch to UA or some other program?