These lounges are a welcoming oasis away from the hustle and bustle of a busy airport.

Several carriers, such as Singapore Airlines, Etihad Airways, Emirates, British Airways, and Lufthansa, continue to offer first class on key routes.

The envy of passengers during boarding, disembarking and meal service – the premium people at the front of the plane have more to their tickets than fold-out beds and complimentary snacks. With ...