I don't know, but it's free to call and find out before you book.
Also, sometimes fares can be surprising - if domestic, check the "instant upgrade" fares, particularly if this involves a person of size. It
may be cheaper to buy the "instant upgrade" than to purchase XTRA SEAT in some instances.
Originally Posted by
nkedel
If you've got two people traveling together, I assume the same "XTRA SEAT" booking could be used for a (paid) blocked ticket between the two of them? This is a lot cheaper than J, and even for people who don't need the extra seat, I can see split across two tickets it being worth it for comfort.