The highly anticipated match is scheduled for December 29 at the 20,000-seat Viet Tri Stadium in the province, starting at 8pm.
Ticket prices are set at 300,000 VND (11.8 USD), 500,000 VND (19.7 USD), and 600,000 VND (23.6 USD).
In-person ticket sales began on the morning of December 27 at the indoor sports hall of the Phu Tho Sports Complex in Viet Tri City. Tickets will be sold until they are sold out.
Thousands of fans already queued up outside the complex early in the morning, with many camping overnight on December 26 to secure tickets for the second-leg semi-final featuring the host team, Vietnam.
Earlier, on December 22, the Vietnam Football Federation (VFF) began selling tickets online via the VinID app. However, all tickets sold out within just 15 minutes.
On December 26, Vietnam beat Singapore 2-0 away in the first leg of the ASEAN Cup semifinals.