Many airlines have suspended flights to some Middle East destinations, but others are adapting and using new routes.

The conflict in the Middle East has already led to the closure of huge swathes of crucial airspace. Since Israel launched its offensive, commercial flights have avoided flying over Iran, Iraq, Lebanon, Syria and Jordan.

Commercial airlines around the world on Monday were weighing how long to suspend Middle East flights after the U.S. struck Iran. Singapore Airlines, one of the highest-profile in Asia, had called the situation "fluid" on Sunday as it cancelled flights from Singapore to Dubai following a security assessment.