To avoid being offloaded from a flight at the Ninoy Aquino International Airport (NAIA), passengers should ensure that they have all the necessary travel documents such as a valid passport and visa, and comply with the requirements of their destination country. Passengers should arrive at the airport on time, avoid carrying prohibited items in their luggage, and behave appropriately while at the airport. It is also recommended to check with the airline for any specific requirements or restrictions prior to the flight.