The contract begins on April 1, 2019, and is for a period of two years with Alliance operating eight flights per week between Perth and Leinster.
Contract won through “competitive tender process”
Alliance chief executive officer Lee Schofield said: “We are delighted to be providing these flights over the next two years.
“This contract has won through a competitive tender process and is testament to our safety record, on time performance and competitiveness in the market place.”
The company has also extended its contact with Minerals and Metals Group (MMG) for a further two years.
Alliance currently provides four flights per week for MMG between Townsville and Cloncurry.