United Airlines has once again ceased flying to Tel Aviv, following Iran's April 13 missile attack on Israel.
United also canceled its Tuesday departure to Jordan from Washington Dulles.
"We continue to closely monitor the situation and will make decisions on upcoming flights with a focus on the safety of our customers and crews," the airline said.
United has moved its crews out of the region with plans to return once the airline considers it safe.
Travelers booked on United to Tel Aviv through May 1 can cancel and receive a full refund.
United was the only U.S. airline serving Israel. It resumed Newark-Tel Aviv flights in March after halting service last October, when Hamas sparked war after attacking Israel. Delta is scheduled to resume Israel service in June.
Meanwhile, Israeli flag carrier El AL continued all U.S. service over the weekend and will go forward with the launch Monday of twice-weekly service between Fort Lauderdale and Tel Aviv. El Al is operating 10 flights between the U.S. and Israel on Monday, including five from New York JFK, two from Newark and one each from Los Angeles, Miami and Fort Lauderdale.
El AL customers who had travel booked between April 13 and April 20 can rebook for free by April 20. El Al will provide travel credits, but not refunds, to customers who cancel their travel.
"In trying times, El Al attempts to do its best to maintain a full flight schedule by not canceling flights," airline spokesman Elie Rosenfeld said. "We're offering full vouchers so that passengers can make a comfortable decision for themselves and their families and they can visit Israel at a time that is more convenient for them."