Check out web sites like Expedia or Price Line and see what they have listed as the lowest airfare. Then, go directly to that airline’s web site and check their price. Nine times out of ten, it’s the same or lower.
Plus, if you buy directly from the airline, you don’t have to pay the extra fees.
I have experienced with Expedia it is best travelling site. They also offer Expedia coupon codes which give you so much discount. I enjoyed my visit with them.