First of all, the dates that you posted, 10/2/10-10/1/10, don t work for travel.However ... My suggestion would be to first try kayak.com. It is a Web site that searches all the other Web sites and give you one-stop shopping results. It s super easy to use and will save you time in your searching.Also I suggest trying Hawaiian Airlines, www.hawaiianair.com. Hawaiian Airlines often has incredible deals, although I don t know if they fly out of Oregon. You may have to drive to Seattle first if they don t. They had a partnership with the Seattle Seahawks and I got an email a few weeks ago advertising $300 roundtrip airfare from Seattle to Honolulu on Hawaiian.Last suggestion would be to contact a travel agency, specifically one that deals with Hawaii travel a lot. I like Panda Travel, which is Hawaii-based. The reason I suggest the travel agency is they often buy tickets in bulk and then are able to sell it to you cheaper than what the airline would sell it to you for. I have found great deals traveling from the Midwest to Hawaii using Panda Travel (when I used to live out that way).Now I travel Seattle to Hawaii, those are always the places I check: kayak.com, Hawaiianair.com, and Panda Travel.
I can suggest you two options for finding cheap airfare.First one:You should check flight price on airline site itself.Second one:There are quite few travel sites where you can search and compare flight price online like kayak, orbitz, Southall Travel etc.Also be flexible on your date and time.Hope it will be helpful.
I would check out Dohop.com. Someone mentioned Kayak - they do a good job but don t include as many airlines as Dohop.com. Skyscanner could be an option as well, but probably not as good.
I Searched on this site and got the Cheapest Flights,Check it out,it also had Discount Coupon Codes for Expedia,Orbitz,Travelocity,Kayak, Priceline,etc.http://freetravel4ever.blogspot.com