It varies a lot depending on airline. Top tip : if you are flying internationally avoid Uas airlines where possible. The US airlines are built around domestic

It varies a lot depending on airline. Top tip : if you are flying internationally avoid Uas airlines where possible. The US airlines are built around domestic flights. They treat international flights as "long domestic ". By contrast some airlines are built around long-haul (international) flights, with domestic either not there at all, or just a feeder. Don't get me wrong, economy is still economy. But an economy seat on Emirates is better than economy on United or Delta (well, last time I flew those anyway.) Perhaps the biggest innovation though is seat-back entertainment. Done well, it makes a huge difference to long-haul flights.