On Wednesday U.S. Defense Secretary Jim Mattis signed the previously approved Boeing plane deal with Qatari Minister of State for Defence Affairs Khalid al-Attiyah.
"Although the kingdom is a party in this crisis, we know that King Salman is a party in resolving it", the Turkish minister said. The F-15 accord will lead to "closer strategic collaboration in our fight to counter violent extremism and promote peace and stability in our region and beyond", the ministry said Wednesday in a statement.
Trump has repeatedly echoed the accusations against Qatar, even as his Defense and State Departments have tried to remain neutral in the dispute among key allies.
In Washington, a State Department spokeswoman said the United States continued to work with Qatar and other governments in the region and the planes deal had been years in the making.
Qatar's Ministry of Defence said that the deal would create 60,000 jobs in 42 USA states while reducing the burden on American forces.
In another development, two US Navy vessels arrived in the Gulf on Wednesday for a joint exercise with Qatar's fleet, according to Doha state media.
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It is also to be noted that President Donald Trump has criticised Qatar on one hand but on the other hand, he does not seem to be caring as to who gets the deal as long as U.S. gets money which has come under wide criticism among the political circle.
Qatar is an important base for the US military carrying out operations against Islamic State militants and other groups in Iraq, Syria, Afghanistan and beyond.
Qatar has denied the accusations, calling the moves to diplomatically isolate it "unjustified".
Ankara has said that it stands with Qatar against sanctions and has urged Riyadh to take the lead in finding a solution to the crisis.