There are a few websites that you may find useful. The website that I find to give the best discounts is www.AlaskanCruise.com. They offer 75% off regular prices.
Best Price Cruises has many listings on Alaskan cruises, including last minute cruises and has a tab for the top cruise deals. In addition to that, it has a cruise planner which you may find useful.
There are many websites to visit to get information on Alaskan cruises. A few to check out are www.royalcaribbean.com and www.alaskatravel.com/Alaska-cruises.
The best discounts on Alaskan cruises are for cruises leaving during the months of May and September. Alaskan cruises run from May through September. The most expensive times for an Alaskan cruise are during the warmer months of July and August.
Check with Carnival Cruise lines. They offer Alaskan cruises and many time deals for 4 person families can be had.
A local travel agency may be able to help you find discounted Alaskan cruises. You can also look for discount Alaskan cruises on websites such as www.alaskacruises.com, www.cruiseshopping.com, and www.alaskacruise2011.com
I find the best deals for Alaskan Cruises can be found at Expedia dot com. Expedia has a complete package that includes the cruise and hotel accommodations.
You will find consumer reviews from a multitude of Alaskan cruises and ships at Cruise Critic dot com. Simply visit the site, find "community" on the menu bar and go to member reviews.
Trip adviser and Cruise Critic both have information on Alaskan cruises. Trip Adviser has customer reviews so is very helpful. They have information on operators and Ports of Call.
Go to alaskacruiseexperts.com. It is pretty organized and has some good deals.
I was able to find one-week cruises to Alaska through Princess Cruises, Holland America Line, Celebrity Cruises, and Royal Caribbean International, among others.
You can find ALaskan cruises at any of the Cruise lines. You would have to plan your trip around when the cruise would take place of course. You can start by looking into Travelocity.
Most Canadian cruises leave from Vancouver. This is the starting point for the popular Alaskan cruises. They make stops in about 5 or 6 Alaskan ports before returning to Vancouver.