cardboard on rails, bubble wrap around the lot. tuck paddle(in cover) in matching deck curve. pool noodle next to paddle(cut in half). All in Da Kine 10mm coffin travel bag. 2 times with airasia no issues.

More handles on bag help baggage handlers so they do not kick/throw things

I reckon the paddle is the biggest worry.

This year I put my Kialoa paddle in it's padded cover in my 6'4 short board coffin bag with the handle hanging out the end, my kite harness around the blade and tail of my shortboard/kiteboard, with one rolled kite each side of the shaft and had no worries. My SUP was just in another padded board bag by itself with a towel and some clothing protecting it (yep I had a ship load of gear but it is pretty cheap with Air Asia).
I now use a KeNalu paddle and am heading over in March just taking a SUP, I think I will remove the blade and handle and put them in my carry on bag and put the shaft inside a pvc pipe in my SUP bag along with towel and clothing.
I have already booked accommodation and my room has a hair dryer so I will assemble my paddle there.

I always use the boardbag as my main 'suitcase'.

Pack towels, shirts, boardies, rashies etc and most of my stuff which protects the paddle and board, never had any issues. Check in a boardbag and then carry on a backpack - too easy.

cheers

Rob.