Ticket prices could quickly start to increase if the conflict lingers as airlines have to reroute flights, adding hours to those flights and the use of more fuel.
As Tehran retaliates by firing missiles at U.S. bases in several countries across the region, officials, aid groups and world leaders fear the confrontation could escalate.
The U.S. and Israel attacked Iran on Saturday in what President Donald Trump said was a massive operation to destroy the country's military capabilities.