EX-5.1

Exhibit 5.1



		767 Fifth Avenue New York, NY 10153-0119 +1 212 310 8000 tel +1 212 310 8007 fax

July 1, 2024

Six Flags Entertainment Corporation

8701 Red Oak Blvd.

Charlotte, North Carolina 28217

Ladies and Gentlemen:

We have acted as counsel to Six Flags Entertainment Corporation, a Delaware corporation (the “Company”), in connection with the preparation and filing with the Securities and Exchange Commission of the Company’s Registration Statement on Form S-8 (the “Registration Statement”), under the Securities Act of 1933, as amended (the “Securities Act”), relating to the registration by the Company of up to 12,039,428 shares of common stock, par value $0.01 per share, of the Company (the “Common Stock”), which are issuable pursuant to the Six Flags Entertainment Corporation 2024 Omnibus Incentive Plan, and outstanding awards under the Cedar Fair, L.P. 2016 Omnibus Incentive Plan and Six Flags Entertainment Corporation Long-Term Incentive Plan (collectively, the “Plans”).

In so acting, we have examined originals or copies (certified or otherwise identified to our satisfaction) of (i) the Registration Statement, (ii) the Amended and Restated Certificate of Incorporation of the Company filed with the Secretary of State of the State of Delaware, (iii) the Amended and Restated Bylaws of the Company, (iv) the Plans, and (v) such corporate records, agreements, documents and other instruments, and such certificates or comparable documents of public officials and of officers and representatives of the Company, and have made such inquiries of such officers and representatives, as we have deemed relevant and necessary as a basis for the opinion hereinafter set forth.

In such examination, we have assumed the genuineness of all signatures, the legal capacity of all natural persons, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as certified, conformed or photostatic copies, and the authenticity of the originals of such latter documents. As to all questions of fact material to this opinion that have not been independently established, we have relied upon certificates or comparable documents of officers and representatives of the Company.

We have also assumed that (i) no stop orders suspending the Registration Statement’s effectiveness will have been issued and remain in effect, in each case, at the time Common Stock is offered or issued as contemplated by the Registration Statement and the Plans, and (ii) all the Common Stock will be issued, offered and sold in compliance with applicable federal and state securities laws and in the manner stated in the Registration Statement.

Based on the foregoing, and subject to the qualifications stated herein, we are of the opinion that the Common Stock to be issued pursuant to the Plans has been duly authorized and, when issued and delivered upon the receipt of consideration constituting lawful consideration under Delaware law in accordance with the Plans, will be validly issued, fully paid and non-assessable.