Emirates and FlyDubai said they were making a small number of flights to and from Dubai starting Monday night after shutting down because of airstrikes in the region.
Higher fuel prices and lower demand for international flights are expected to eat into airlines’ profits.
Fighting is spreading throughout the Middle East as Iran retaliates against a huge American-Israeli military campaign.
The grim toll signaled that Iran was more prepared for war than the Trump administration anticipated, U.S. military officials said.
Lawmakers questioned whether the United States faced an “imminent” threat from Iran, a requirement for the president to lawfully initiate military action without congressional approval.
A badly weakened Iran will no longer intimidate or threaten its neighbors in the same way. The regional impact could be comparable to the collapse of the Soviet Union.
More than 100 people were injured and at least four were killed after Iran fired hundreds of missiles and drones at Gulf cities, including Dubai, Abu Dhabi and Doha.
President Trump’s envoys negotiated with Iran over its nuclear program. But Mr. Trump and Prime Minister Benjamin Netanyahu of Israel wanted much more.
As Iran’s second supreme leader, he brutally crushed dissent at home and expanded Iran’s footprint abroad, challenging Saudi Arabia for regional dominance.
President Trump’s ambiguous appeal comes after he undermined U.S.-funded media outlets that normally would have helped the administration reach people inside the country.