In August 2015, as the U.S. State Department approved a $5.4 billion sale of 600 Lockheed-made Patriot missiles to Saudi Arabia, alongside an additional half billion dollars in ammunition for various smaller weapons.
Tellingly, Saudi Arabia is buying 68% of its arms purchases from the U.S. According to the Stockholm International Peace Research Institute (SIPRI) from 2014-18, the kingdom received 56 combat aircraft from the United States and 38 from the United Kingdom, with aircraft in both cases equipped with cruise missiles and other guided weapons.
Associated Press quoted UN investigators as saying that the Houthis' new UAV-X drone, found in recent months during the Saudi-led coalition's war in Yemen, likely has a range of up to 1,500 kilometers. That puts the far reaches of both Saudi Arabia and the UAE in range.