Luongo was also selected in the 23-man squad for the Asia Cup to be played on home soil in Australia. Swindon teammate Yaser Kasim was also called up for his home nation Iraq, meaning that the club would have to compete in their regular League One season without the two central midfielders for a month. He went on to score in Australia's 4–1 win over Kuwait in the opening game of the tournament, in addition to providing the assist that led to Tim Cahill scoring Australia's first goal of the match. At the end of the game, he was named as man of the match. Luongo also started in Australia's second group game against Oman, providing the assist for Robbie Kruse to score Australia's second goal in an eventual 4–0 win. He played in the 2015 AFC Asian Cup Final against South Korea, scoring the first goal from outside the box in a 2–1 win. He was named as Most Valuable Player of the tournament after scoring two goals and assisting four throughout the tournament.