Ray and I aren’t fond of checking luggage so we tend to travel light. One way we manage, is travel vests. His is a very professional jacket with zip off sleeves fromScottevest. com. While it’s not the current model, it has lots of great design features and has held up well for years.
Mine is a photographer’s or fisherman’s vest from someplace like REI, Cabelas, etc. It is a more affordable if slightly less stylish option that has lasted twenty years or so of multi-use (travel and photography). It is finally starting to show it’s wear. Besides, I’m not as thin as I was when I bought it. So I’ll probably invest in a new vest soon.
But either option will make your packing easier. It doesn’t count as a bag, but lets you slip a lot of critical items close to your body for that long flight (prescriptions, e-readers, earpods, and so on.)