Flights To Seattle

Hello, I plan to travel from Seattle to Dallas, TX in April 2011 ..... can someone help me see what are the cheapest airlines to travel from Seattle to Dallas, TX?? I am looking for a round trip or at least can anyone recommend an airline?? I saw on the internet round-trip for $ 350 is this correct?? Finally, I would buy the ticket at least 1 month before the trip .. can this be a good choice to do?? I mean that can help me reduce the ticket price?? Thank you! =)

Look www.bestfares.com
The last time I went to Frontier and I changed planes in Denver.
With gas prices high you can not be any cheap rates for long.

you can search and compare airline tickets and the cheapest airline tickets online in a website, and grab the best deal ever. http://www.finddirtcheapairlinetickets.com