His resignation is effective from May 3, 2018, ending his tenure of more than three years.
Woo was appointed chairman of PNG Air Limited in 2014, two years after becoming a director in 2012.
The PNG Air Limited Board anticipates announcing its new chairman after its meeting scheduled for May 9th 2018.
Woo’s resignation comes more than a week after the announcement of Murlee Siva as chief executive officer.