144: Filer Information

Filer CIK

0001511298

Filer CCC

XXXXXXXX

Is this a LIVE or TEST Filing?

LIVE

TEST

Submission Contact Information

Name

Phone

E-Mail Address

144: Issuer Information

Name of Issuer

FRONTIER GROUP HOLDINGS INC

SEC File Number

001-40304

Address of Issuer

4545 AIRORT WAY
DENVER
COLORADO
80239

Phone

7203744200

Name of Person for Whose Account the Securities are To Be Sold

BARRY BIFFLE

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Officer

144: Securities Information

Title of the Class of Securities To Be Sold

Name and Address of the Broker

Number of Shares or Other Units To Be Sold

Aggregate Market Value

Number of Shares or Other Units Outstanding

Approximate Date of Sale

Name the Securities Exchange

COMMON

UBS Financial Services Inc
1000 Harbor Blvd
3rd Floor
Weehawken � NJ � 07086

214182

790000

229609718

03/10/2026

NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class

Date you Acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired

Is this a Gift?

Date Donor Acquired

Amount of Securities Acquired

Date of Payment

Nature of Payment *

COMMON

10/25/2025

RSU

FRONTIER GROUP HOLDINGS INC

131836

10/25/2025

N/A

COMMON

02/06/2026

PSU

FRONTIER GROUP HOLDINGS INC

10869

02/06/2026

N/A

COMMON

02/06/2026

RSU

FRONTIER GROUP HOLDINGS INC

61804

02/06/2026

N/A

COMMON

02/08/2026

RSU

FRONTIER GROUP HOLDINGS INC

1447

02/08/2026

N/A

COMMON

02/08/2026

RSU

FRONTIER GROUP HOLDINGS INC

8226

02/08/2026

N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller

Title of Securities Sold

Date of Sale

Amount of Securities Sold

Gross Proceeds

SEC Form 144 filed by Frontier Group Holdings Inc.