Update (6:26pm ET, Aug. 19): This sale has been extended for bookings through Tuesday, Aug 23.      

For $599 per person, see bears, eagles and whales while sailing seven-nights through Alaska’s translucent blue icebergs.

This early bird pricing saves travelers $250 per person when compared to other 2012 cruises. Plus, book by Friday and score a $100 onboard credit per cabin.

Cruise roundtrip from Seattle aboard the Celebrity Infinity, voted No. 4 in the Top 10 Large Ships by Conde Nast Traveler:

• $599 … May 11; Sept. 14
• $699 … May 18
• $749 ... May 25 (Memorial Day), June 1, Aug. 31 (Labor Day), Sept. 7

Or sail on the Celebrity Century roundtrip from Vancouver:

• $649 … Sept. 9
• $659 … May 13, 20
• $699 ... Aug. 26, Sept. 2 (Labor Day)

Cruising roundtrip saves travelers hundreds of dollars versus open-jaw airfare. Itineraries on both ships vary slightly but include cruising through the Inside Passage and visits to Ketchikan and Juneau -- the home to the world's largest collection of totem poles.

Click here for more information on this offer, including sale prices on oceanview and balcony cabins and additional summer 2012 sailing dates. This is part of CruCon's Early Bird Sale on Celebrity Cruises featuring credits up to $350, specialty dining and reduced deposits on most 2012 sailings.

This sale is limited to 25 cabins per sailing.