Singapore Airlines customers who booked their flights directly can use the airline’s Assistance Request Form to seek a refund.

Some U.S. and other international airlines are keeping a halt on flights to major Middle Eastern airports as global carriers scramble to figure out whether to continue flying to the region amid intensifying conflict between Israel and Iran and military intervention by the U.

Qatar on Monday closed its airspace and the U.S. and U.K. urged their citizens to shelter in place there after a missile attack by Iran on the U.S. forces at the country's Al Udeid Air Base.