Join Date: Feb 2013
Location: SFO, MNL, SIN, HAM
Programs: UA GS, SQ PPS, IHG Plat Amb, Marriot Gold, Hilton Gold, Club Carlson Gold, Accor Plat
Posts: 489
I would recommend a soft backpack instead of a hardcase, both for size and weight! Ryan Air also has a weight limit and a full roll-aboard can easily exceed that.
eBags Weekender and CabinMax have very good carry-on size backpacks that meet Ryan Air (and other European LCC) restrictions!