Is it permissible to combine the Maghrib and Isha prayers by advancing the Isha prayer, and to shorten the Isha prayer to two rak'ahs, in the airport waiting lounge, with a mahram present, and the place being intermingled with non-mahram men?

If a female traveler has passed beyond the inhabited houses of the town from which she departed, it is permissible for her to combine and shorten prayers. However, if she is still within the town, she is not permitted to shorten the prayer. If she fears missing the prayer time, it is permissible for her to combine the Isha prayer with Maghrib as a jama taqdim (early combination), while completing the Isha prayer, according to many scholars. Regarding prayer in an airport lounge where men are present, there is no harm if no other place is available, provided she strives to pray in a corner far from the gaze of men as much as possible, and adheres to full hijab and complete covering.