Cheap tickets and travelling informations?

Hi all!

Thinking of going to visit my parents in US.
So anyone know a good website that I can track and compare plane tickets, get a good deal?

I like kayak.com.

Most comparison websites like travelocity will let you set up a fare alert if the fare between the cities you want drops for the dates you want.

I use SkyScanner.    You can be flexible to set your destination as a specific airport, city, state or country.    I think I've found most/all of my flights through there (you don't actually buy on SkyScanner- it sends you to the site with the cheapest deal and gives you options of other sites in case you prefer a different site.