The latest addition to Lenovo's ThinkPad line of business laptops is the small-format 13.3-inch ThinkPad X390. It would be an easy addition to your hand luggage and has a tough outer shell, making it suitable for mobile professionals who don't want to carry a beast of a laptop. The 13.3-inch screen might be small for some users, but with up to a Core i7 processor on board there's plenty of power available. The option of LTE mobile broadband will be an additional lure for regular travellers.
Lenovo ThinkPad X390 review at ZDNet