Check out this last minute seat sale at Expedia.ca! Get round trip flights for as low as $333 for great destinations in the USofA.
This seat sale is only going on the 9th and 10th of May, 2011 so don't delay.
Also of note: no longer do you have to pay booking fees with Expedia.ca. When you book online with Expedia.ca you will experience fee free booking! Sweet :-)