Ripudaman Singh Malik and Ajaib Singh Bagri were charged in the 1985 Air India crash off the coast of Ireland that killed 329 people including 278 Canadians.
Police believe the plane was brought down by a terrorist bomb.
Bagri alone was charged with the 1988 attempted murder of Indo-Canadian Times newspaper publisher Tara Singh Hayer. Hayer was shot to death in 1998. Malik and Bagri will appear in court Monday. The same day as the crash, an attempt to sabotage Air India Flight 301 in Tokyo backfired when the bomb blew up prematurely, killing two baggage handlers. Malik and Bagri are charged in both explosions.