As you probably already know, I am still based in Bucharest, Romania – my home country so I travel a lot in Europe due to the small amount of time that we have to spend on the plane, but also because Europe has some crazy beautiful destinations to visit.
These flights last between 1 hour (to Istanbul, for example) to 3,5-4,5 hours (to London/Madrid/Lisbon). Obviously, you won’t need as many items as a long flight would require.