Stroller advice

Hi girls! I have a stroller question ... I currently have the uppababy vista and love it for an overall travel system, however I am looking for a light weight less expensive option for traveling. We have Mexico coming up then Portugal to see family in the summer.  With the visita you need to take off the second seat in order to fold it up which doesn't seem practical for air travel and whatnot. I like the joovy double stroller but it's a side by side ... will I not be about to fit places? I get a lot of mixed reviews with stadium vs side by side seating as they get older. Any ideas?