J is basically domestic F. Some planes are newer and vastly better than others, but no way of knowing which is which ahead of time.
I know it's a question that only I can answer for myself, but I'm interested to know your (and others') opinion on whether it's worth the extra UA miles to travel in J? 17.5k vs. 30k each way. I realize it is "domestic F" and the KSML may be inedible. I have access to PP lounges, so not much benefit, plus I don't even know what lounge Copa uses at BOS? Maybe the UA lounge in a totally different terminal, not connected airside?
But it's a small amount of additional miles to fly J...is it worth it?
I should’ve mentioned, the route is Boston to Panama City. It’s about six hours each way.