As noted above, the technology of the iPad is biased toward a sharp depth of field. You might want to consider other attributes too. When zoomed to the 1:1 pixel level, are the details just as sharp and detailed as a successful (good) DSLR result? This includes both the 1:1 details on your monitor and both image files printed to the same physical dimensions. Does the iPad capture in RAW? Is the comparison for all photography or just landscapes? How does the iPad perform in low(er) light? Are there flaws in the shooting technique of the DSLR user that lowers the output quality?

Not overseas, but I used the Airport Elements bag for a trip to Hudson Bay, Canada, in a series of ever smaller planes. It was perfect for my needs, and fit within the space limitations of the often picky Air Canada and others. I also found that, although the airlines are strict in enforcing weight limits for your carry-on luggage, not so for you. I stuffed two lenses in my jacket pockets and rearranged things once on the plane. Of course, always check with your airline for current restrictions.