As filed with the Securities and Exchange Commission on May 19, 2021

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM S-1

REGISTRATION STATEMENT

UNDER
THE SECURITIES ACT OF 1933

Sun Country Airlines Holdings, Inc.

(Exact name of registrant as specified in its charter)

2005 Cargo Road

Minneapolis, MN 55450

(651) 681-3900

(Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant’s Principal Executive Offices)

Eric Levenhagen, Esq.

General Counsel and Secretary

2005 Cargo Road

Minneapolis, MN 55450

(651) 681-3900

(Name, Address, Including Zip Code, and Telephone Number, Including Area Code, of Agent For Service)

Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box.  ¨

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  þ 333-256201

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ¨

CALCULATION OF REGISTRATION FEE

(1)  The shares of common stock being registered in this Registration Statement are in addition to the 6,900,000 shares of common stock registered pursuant to the registrant's Registration Statement on Form S-1 (Registration No. 333-256201).

(2)  Includes 187,500 shares of common stock which may be purchased by the underwriters to cover over-allotments, if any.

(3)  The registration fee is calculated in accordance with Rule 457(a) under the Securities Act of 1933, as amended, based on the proposed maximum aggregate offering price. The registrant previously paid a filing fee of $28,110 for the Registration Statement on Form S-1 (File No. 333-256201), which was declared effective on May 19, 2021. In accordance with Rule 462(b) under the Securities Act of 1933, as amended, an additional amount of securities having a proposed maximum aggregate offering price of $49,593,750 are hereby registered, which includes the additional shares that the underwriters have the option to purchase.

This Registration Statement shall become effective upon filing with the Securities and Exchange Commission in accordance with Rule 462(b) under the Securities Act of 1933, as amended.

EXPLANATORY NOTE

This Registration Statement is being filed pursuant to Rule 462(b) (“Rule 462(b)”) and General Instruction V of Form S-1, both as promulgated under the Securities Act of 1933, as amended. Pursuant to Rule 462(b), the contents of the Registration Statement on Form S−1 (Registration No. 333-256201) of Sun Country Airlines Holdings, Inc. (the “Registrant”), including the exhibits thereto, which was declared effective by the Securities and Exchange Commission (the “Commission”) on May 19, 2021, are incorporated by reference into this Registration Statement.

CERTIFICATION

The Registrant hereby certifies that it (i) has instructed its bank to transmit to the Commission the filing fee set forth on the cover page of this Registration Statement by a wire transfer of such amount to the Commission’s account at U.S. Bank, N.A. in St. Louis, Missouri as soon as practicable (but no later than the close of business on May 20, 2021), (ii) will not revoke such instructions, (iii) has sufficient funds in the relevant account to cover the amount of such filing fee, and (iv) will confirm receipt of such instructions by its bank during the bank’s regular business hours no later than May 20, 2021.

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 16. Exhibits and Financial Statement Schedules

All exhibits filed with or incorporated by reference in Registration Statement No. 333-256201 are incorporated by reference into, and shall be deemed to be a part of, this registration statement, except for the following, which are filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Minneapolis, State of Minnesota, on May 19, 2021.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed on May 19, 2021, by the following persons in the capacities indicated.

INDEX TO EXHIBITS