Hi there Im not sure if this should be posted here but I am looking around to see which airlines offer pretty good air pass deals and was just wondering if anyone has used these before or has any advice for someone using one for the first time, I only want the pass to be valid within the USA as I will have a return flight pre-booked from the UK. Can you earn miles/tier pass flights? Which airlines would you recommend looking into to get one from.

Thanks!

Mark