OK, so the Airport Accelerated was way too big. Great bag, but too much room. I ultimately decided that I'll be leaving a few lenses behind depending on the shoot (e.g. leave the 24-70 behind to bring the 24, 35, 50, 135). No need to bring every single lens, so I downsized to the Airport Antidote which will without a doubt fit underneath the seat in front of me on the airplane.
Pics for comparison: