Airlines said that they would reroute flights to avoid flying over Ukraine, after a Malaysian Airlines jet was reportedly shot down on Thursday.
Delta issued a statement saying that it already did not operate any flights through Crimean airspace, because the Federal Aviation Administration on April 3 issued a notice prohibiting U.S. carriers from doing so.
The notice warned about a “potentially hazardous situation” and the danger of “misidentification of civilian aircraft.”
It also said airlines could get conflicting air traffic control instructions from Russian and Ukrainian authorities.
European airlines and transport ministries said Thursday that aircraft were avoiding flying over parts of the Ukraine.
Lufthansa said that it will fly a “wide detour” around eastern Ukraine immediately, a change that would affect four flights today. Currently there are no restrictions on Lufthansa service to Kiev and Odessa.
IATA said in a statement that the Malaysian plane was not flying through restricted airspace.
The European Cockpit Association, which represents 38,000 European pilots, said the plane was flying the most common route for flights from Europe to southeast Asia.