Cost alerts on flights to Atlanta are rapid and easy to put in place on momondo. Simply just carry out a search and choose the price notify feature. It is as simple as that. Underneath is a list of other destinations to United states from Heathrow with either direct flights https://www.reddit.com/r/BusinessClassFlight/comments/1gat1os/what_are_the_top_tropical_destinations_to_heat_up/