Lowepro - Flipside 500 AW II Camera Backpack - Black

This bag offers plenty of space. Have my D750 camera, 24-70 zoom lens, 70-200 lens, 300 lens, and still have room to spare.

I also have the 250. You can load a 400mm and all the lenses needed for decent holiday shooting, travel docs, a small Microsoft laptop, batteries, headphones, chargers, and whatever else you want to hump. But it is LARGE. Save yourself a SURPRISE. LOAD UP A FEW WEEKS BEFORE YOUR FLIGHT, AND GO TO THE AIRPORT AND ASK THEM IF THIS WILL FIT UNDER YOUR SEAT. OR PASS THROUGH TSA. You may want to get a smaller bag. A 9 hour flight from Dalllas to Maui.... you want your legs jammed around where they can barely move?