I'd post a comment, but it would appear that each time I do, someone else pops in with his two-cents-worth. I wasn't recommending a Poncho Liner in that previous post, merely querying why someone had not suggested it. And I offered the suggestion of the Softie 3 Merlin because it is a superior product, and worthy of you; someone should have understood that, instead of lamely referencing his ad-hoc exterior garment.
However, in this problem of costly air tickets, could you register him as a dependent (though large despite his attested age)?

Cheers
JMH

tee hee. I think his five o'clock shadow would give him away as not being an infant in arms.
For some reason, it is more expensive for me to fly to South Carolina than just about any other place I've been - it's just about twice as much as it costs to fly to California, Nevada, Michigan, etc.

Argghhh! Being completely unable to resist, at least my two cents is worth more than your two cents! Neener neener neener!

And besides, given my general level of maturity, I spent most of my adult life as an infant-in-arms. Or under arms, at any rate.

Whoa, if the keyboard had stuttered, you'd have been in-fan-try!

Cheers
JMH