I have flown this route several times. There is no concern whatsoever with regard to dress code. The regulations calls for ALL passengers to remain in the aircraft. No one is allowed out unless in case of extreme emergency and at this occasions there should be no issue with dress code.

The only restriction with regard to Saudi "way of life" is the ban of alcohol consumption on board of the flight while grounded!!

The only concern one should have would be the condition of the airplane!! Very dated.. almost the worst of CX regional fleet operate this route!!