The attack, which was planned by a group of B.C. Sikh separatists, killed 329 people off the coast of Ireland 30 years ago.
Naveen Girn, the organizer of the Vancouver memorial, said the tragedy is still fresh in people's minds and that it's important to remember the victims.
"This is the largest terrorist act ever committed against Canadians," Girn said. "Remembering it as something that affects all of us is important."
Milan Singh read the names of all the lives lost on the flight. Those names are also on the memorial in Ceperley Park.
Harjit Sajjan brought his two young children to see the name of his friend's dad, the captain of Air India, on the memorial.
Honouring the victims
Others, such as Saffrin Granby and Chris Slatter, who weren't alive at the time, went to honour the victims.
A small group of B.C. Sikh separatists plotted to bomb two Air India planes in their campaign against the Indian government.
Two suitcase bombs were checked in at Vancouver airport on flights connecting to Air India planes. One of the flights blew up off the coast of Ireland on June 22, 1985, and the second suitcase exploded at Tokyo's Narita Airport, killing two baggage handlers.
A lengthy trial ended in 2005 with the acquittals of two suspects and a public inquiry into the investigation.