The deals are a coup for the Obama administration ahead of the midterm Congressional elections.
The aircraft contracts are set to benefit defence manufacturers in 44 states and help to protect 77,000 jobs.
Malaysia, Qatar, Turkey and other Arab countries have also confirmed that Eid al-Fitr will be celebrated on Sunday June 25.
The US imported 1.3 million barrels of Saudi crude a day in February, up 32% from last year, according to the Energy Information Administration.
Saudi Arabia is hoping the Aramco IPO will be valued at a stunning $2 trillion.
The kingdom continues to grapple with low oil prices and a bloated budget, making it critical that the Aramco IPO goes off without a hitch.
Saudi Arabia, the largest oil exporter in the world, dramatically slashed taxes on Aramco in March in an effort to quell concern about the oil giant's valuation.
Aramco also gets the exclusive right to sell Shell-branded gasoline and diesel in Georgia, North Carolina, South Carolina, Virginia, Maryland, the eastern half of Texas and the majority of Florida.