To calculate month-to-month normal charges, KAYAK normally takes all rates for monthly throughout the last calendar year for round-excursion flights from London to Atlanta, removes the highest 0.one% to account for outliers, after which you can usually takes the median of all values for monthly. I made an effort to https://www.evernote.com/shard/s668/sh/583f8dbd-70b7-7a4b-7813-b6e1a7bbfe54/pyjxlWUjvkgH3bVnIP_o9Qwfl7BE7iODAypqF45bMQz1DijHomrdpeT26Q