Well if he considers economy class, cattle class. Then biz is not luxurious.
Correct. When travel is not an endeavor in its own right, but rather a necessary means towards a goal (in this case needing to be in a certain place at a certain time), then we can page
@TimT to find where I previously posted that for long haul travel, often the cost of "economy" travel is greater, due to its effects on the human body and ability to adjust and function once at the destination. And even got the הסכמה of the בעל אכסניה to that statement.