When I travel, I normally don’t carry my usual purse. To ensure maximum space (I have never learned the art of packing light), I carry a larger-sized handbag along side my carry-on luggage.
I think the Balenciaga chain handle saddle bag ($2,495) is the perfect travel bag. Its 10″ x 14″ x 6″ size is large enough to accommodate essentials plus extras such as reading material, a luxe cashmere scarf, and foldable flats. The two front pockets can easily store your passport and cellphone — things that you need easy reach to when traveling. In the military/blue color combination, it is the perfect complement to any wardrobe!
Some other options…
Take your pick!