To compute regular monthly average prices, KAYAK requires all price ranges for monthly during the last yr for spherical-vacation flights from London to Atlanta, removes the highest 0.one% to account for outliers, and then normally takes the median of all values for on a monthly basis. 8Internet accessibility for $8 https://share.evernote.com/note/b40bcb9b-330b-ca8b-66a8-49edf81fde70