To determine monthly normal price ranges, KAYAK takes all rates for on a monthly basis throughout the last calendar year for round-trip flights from London to Atlanta, gets rid of the best 0.1% to account for outliers, then usually takes the median of all values for each month. I tried https://bestbusinessclassnewyork.health.blog/2024/12/06/what-are-the-different-packages-offered-by-the-top-luxury-hotels/