United States securities and exchange commission logo August 19, 2022 Selim Bassoul Chief Executive Officer Six Flags Entertainment Corp 1000 Ballpark Way, Suite 400 Arlington, Texas 76011 Re: Six Flags Entertainment Corp Form 10-K for the Fiscal Year Ended January 2, 2022 Filed February 24, 2022 Form 8-K Filed February 24, 2022 File No. 001-13703 Dear Mr. Bassoul: We have reviewed your filing and have the following comments. In some of our comments, we may ask you to provide us with information so we may better understand your disclosure. Please respond to these comments within ten business days by providing the requested information or advise us as soon as possible when you will respond. If you do not believe our comments apply to your facts and circumstances, please tell us why in your response. After reviewing your response to these comments, we may have additional comments. Form 10-K for Fiscal Year Ended January 2, 2022 Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations Results of Operations, page 39 1. We note you disclose per capita metrics here and in your press releases on Form 8-K. For each metric, please revise your disclosures to include or clarify the following information: How it is calculated, including any estimates or assumptions underlying the metric or its calculation; The reasons why the metric provides useful information to investors; and How management uses the metric in managing or monitoring the performance of the business. Refer to SEC Release No. 33-10751. Selim Bassoul Six Flags Entertainment Corp August 19, 2022 Page 2 Form 8-K Filed February 24, 2022 Exhibit 99.1, page 1 2. We note that you have titled some measures as pro forma allocation of admissions spending to in-park spending. Please tell us if the measures are presented based on the guidance in Article 11 of Regulation S- X. If not, please revise your presentation to more clearly state what the amounts represent and eliminate the use of the description as "pro forma." 3. Please revise your disclosure to clearly indicate Net debt as a non-GAAP financial measure and include the disclosures required by Item 10(e)(1)(i) of Regulation S-K. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. You may contact Tony Watson at (202) 551-3318 or Joel Parker at (202) 551-3651 if you have questions regarding comments on the financial statements and related matters. FirstName LastNameSelim Bassoul Sincerely, Comapany NameSix Flags Entertainment Corp Division of Corporation Finance August 19, 2022 Page 2 Office of Trade & Services FirstName LastName