What online travel site in USA is best?
this is the no. 1 site in usa for coupons and guide.
check here for more sites: https://www.usatoday.com/story/tech/columnist/komando/2017/06/09/5-best-sites-for-finding-travel-deals/102562560/
One of the best travel sites in the US would probably be travelosity.com I here they're the best online site to find travel information.
Must be standle,
source:http://www.standle.com/travel it's an travel meta-search engines. I always used it
You might try cheaptickets.com.