Being held in the Anaheim Convention Center, Southern California, this year's Blizzcon will commence on November 4th and 5th. BlizzCon 2016 tickets will go on sale in two batches. The first batch is due to be released today. The exact schedule of release is such: Wednesday, April 20 at 7 p.m. PT and Saturday, April 23 at 10 a.m. PT. Each ticket costs 200$ and can be bought using the online event ticketing service Universe.
To get more detailed info about the tickets head to this Blizzcon page.