I’ll give you four overseas airlines which are customer-friendly: Quantas, Singapore Air, Finn Air and Lufthansa. I flew all four last year and was surprised at the effort to make passengers feel welcome.
That said, I also have two overseas airlines which I won’t fly again: Air Berlin and Pegasus Airlines. Pegasus has fairly old aircraft, and has probably the worst desk support staff that I’ve ever run into.
Luhfthansa is my preferred airline to
Europe by far. Agreed