Got all my dive gear packed in one check-in trolley-style bag, together with some clothing and a small pharmacy pouch. Good for about 21kg, well within the 2x 22.5kg limit as allowed by Delta Air Lines on flights to the USA.
Sunglasses, logbook, dive computer, cameras, accessories & housings are all safely stowed in my hand-luggage sized backpack, together with a few spare clothes. Another 6kg.