The decision is set to be made in Prague on Wednesday (July 2) with the bid presentations forming part of the 115th International Olympic Committee session.
Vancouver is the favourite, having received praise from the IOC last month but Salzburg is a strong contender thanks to Austria's experience in staging winter sports events.
Pyeongchang is pinning its hopes of a surprise win on the promise of a united Korean team.
Olympic insiders believe Vancouver could clinch victory at the first stage of voting if, as is widely expected, most or all of Europe's 55 members vote for the Canadian city in a move to open the way for a European bid for the Summer Games in 2012.
London, Paris, Madrid and Moscow have already launched bids for the 2012 Games but face competition from New York.
The winning city will require a minimum of 52 votes from the IOC members for the bid to succeed.
For a full review of the chances of the three Olympic bids, see the features section of today's sportbusiness.com
The International Olympic Committee (IOC) president Jacques Rogge will confirm the host city for the 2010 Winter Olympics later this week with Vancouver, Salzburg and Pyeongchang fighting it out for the prize.
