People outside Latvia can get their passes at www.bilesuparadize.lv.
Tickets cost from €2 to €65 and people will be able to buy up to eight seats for a single event in a single session.
The €65 ones are for the best seats in the two special performances.
Usually tickets for the festival, held every five years, are in very high demand with people often not being able to obtain them, despite standing in line for hours and frantically monitoring the ticket sales website.
The venues for the 2018 festival will have greatly increased capacity, with the Daugava Stadium adding 5,000 seats and the Mežaparks open-air stage a further 8,000 to bring its capacity to a whopping 30,000.
Children up to the age of seven, if they'll be sharing a seat with their guardians, will be able to attend for free. Participants will likewise be allowed to enter the closing concert for free.
The 26th Song and Dance Festival coincides with Latvia's founding centenary, and it is expected to be a massive gathering that celebrates Latvia and its choral and dance tradition, with 63 separate events slated to take place.