If you are looking for a flight deal from London Heathrow Airport to Atlanta, look for departures on Mondays and stay away from leaving on a Friday, as it's always the priciest working day. When traveling back from Atlanta, Tuesday is definitely the cheapest working day to fly and Saturday https://share.evernote.com/note/dfd4bb4a-9062-d6e7-6bdb-d918223fae82