First let me say tat the flight back and forth there involved 5 flight transfers and on every flight (even on the smallest plane) the Western Flyer and Tri-Star fit underneath our seats. You might ask where did I put the Synapse 19on the planes? I placed it in the middle compartment of the Tri-Star (empty and flat except for Ipad Mini and a 2 phones and wires) and it fit perfectly. We did not did any heavy clothes since it is so hot there (except for a gown for the misses and long dress pants for me since we were in the wedding. All other dress clothing was rented for the occasion when we got there.
The Synapse 19 was the perfect bag for EDC as the jeepneys, vans, and Tricycles as they are all to crowded to be getting in and out of with a larger day bag. The packing cube backpack was used as our grocery bag at the markets and the shoulder packing cube was my wife's only purse."