I agree with mmouse37--your question can't be answered without more information. Airfare will vary depending on the following variables:
(1) Dates
(2) Preferred flight times
(3) Number of passengers
You can use Orbitz, Travelocity, etc., but sometimes if you go directly to the carrier's website, it is possible that you can get a lower fare. It takes a lot of researching to get the best fares, but it can be done!