There are tons of discount places. Travelocity, priceline, hotwire, orbitz, expedia, even yahoo has some pretty good fairs occassionally. Personally, I have had the best luck with orbitz in the past. Priceline doesn't allow you to pick the time of your flights, but you would probably get the best price from them. If you don't care about making pre-interview dinners, then priceline would be a good bet. If not, I would stick with the other ones that allow you to set the itinerary. Priceline is good for hotels though. You can cut your price in half, or thirds for most hotels.