Hi, I’m thinking of flying frontier nonstop on a longish flight (frontier has the only nonstop at the time I need). I have some issues with people I don’t know sitting right next to me and I try to work seating out where I will most likely have an empty seat beside me (I know how nutty I sound). I have been successful many times playing with seats on other airlines but have never flown frontier. I wondered how often the middle seat in the stretch area is empty? I’m debating between buying my husband and I the aisle and window seat in stretch and hoping the middle remains empty or purchasing an extra seat back in the cheaper area and getting the cheapest assigned seats for the three seats. The cost would be around the same but I don’t care as much about that as the empty seat. Does frontier even give you the option to purchase an extra seat if you don’t need it due to size? Thanks for any help anyone can give!