Guy i have been take an iMac Pro (+ Original box and apple brown box) from US to Thailand by TG flight (Thai airways).
I come to my home perfectly.
I think apple box design for this situation.
I live in both Bangkok and Portland, OR.
I was going to order my MP and have it shipped to my place in Portland - no sales tax - Maxed out everything except the RAM (32GB) and SSD (4TB). I can order it in BKK but it'll cost me $6,xxx more and that's after 25% employee discount. So I decided to import it myself - carry on. But before ordering, I remember that prices in HK is exactly the same as in the US with no sales tax, sometimes a tad bit cheaper (insignificant), so I ordered mine to be shipped to my friend's place in HK. Flying to and from HK is only 2hr45m away and business class seats with big overhead storage is plentiful. I've ordered this https://www.amazon.com/gp/product/B07Y9SRW2Z/ref=ox_sc_act_title_2?smid=A2GM3DB5NJCW4D&psc=1 from Amazon so I can hand carry on the plane.
No import tax for computers, just 7% VAT - and most customs don't even bother.
As for the XDR display and stand, it is only ~$400 more to have it shipped right to my place in BKK so that's what I chose to do.
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.