The spending measure includes $103 million for the A-10 wing replacement program and will cover funds needed to restart the A-10 wing production line and procure the first four wing sets.
President Donald Trump signed the omnibus spending bill on Friday after Congress passed the legislation on Thursday.
The Air Force said in a draft request for proposals posted in February that it could purchase up to 112 wing sets.
A draft schedule noted that the service branch plans to release a final RFP in April and award a contract as early as March 2019.
The Air Force has rewinged 173 A-10s and currently operates 109 Warthogs with their original wings.