To Compute month to month normal rates, KAYAK normally takes all rates for on a monthly basis over the past year for flights from Atlanta to London, removes the best 0.1% to account for outliers, and afterwards takes the median of all values for every month. I paid to the https://whitemagictravels.co.uk/blog/how-to-get-the-best-deals-on-the-flights-to-singapore-from-london/