6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2023

GRUPO AEROPORTUARIO DEL SURESTE, S.A.B. de C.V.

(SOUTHEAST AIRPORT GROUP)

(Translation of Registrant’s Name Into English)

México

(Jurisdiction of incorporation or organization)

Bosque de Alisos No. 47A– 4th Floor

Bosques de las Lomas

05120 México, D.F.

(Address of principal executive offices)

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

(Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

(If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- .)

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: October 5, 2023

Exhibit 99.1

ASUR Announces Total Passenger Traffic for September 2023

Passenger traffic increased year-on-year by 2.7% in Mexico and 24.1% in Puerto Rico and decreased 13.7% in Colombia

MEXICO CITY, Oct. 5, 2023 /PRNewswire/ -- Grupo Aeroportuario del Sureste, S.A.B. de C.V. (NYSE: ASR; BMV: ASUR), ASUR, a leading international airport group with operations in Mexico, the U.S. and Colombia, today announced that passenger traffic for September 2023 reached a total of 4.9 million passengers, 0.8% above the levels reported in September 2022.

Passenger traffic increased year-on-year by 2.7% in Mexico and 24.1 % in Puerto Rico, and declined 13.7% in Colombia. Passenger traffic growth in Mexico was mainly driven by domestic traffic up 9.0% which offset a 4.8% decline in international traffic, while Puerto Rico reported increases of 22.0% in domestic traffic and 46.4% in international passengers. Passenger traffic in Colombia remained negatively affected by the suspension of operations of two local airlines since the beginning of 2023.

This announcement reflects comparisons between the periods September 1 through September 30, 2023 and 2022. Transit and general aviation passengers are excluded from traffic measures in Mexico and Colombia.

About ASUR

Grupo Aeroportuario del Sureste, S.A.B. de C.V. (ASUR) is a leading international airport operator with a portfolio of concessions to operate, maintain and develop 16 airports in the Americas. This comprises nine airports in southeast Mexico, including Cancun Airport, the most important tourist destination in Mexico, the Caribbean and Latin America, and six airports in northern Colombia, including Medellin international airport (Rio Negro), the second busiest in Colombia. ASUR is also a 60% JV partner in Aerostar Airport Holdings, LLC, operator of the Luis Muñoz Marín International Airport serving the capital of Puerto Rico, San Juan. San Juan's Airport is the island's primary gateway for international and mainland-US destinations and was the first, and currently the only major airport in the US to have successfully completed a public–private partnership under the FAA Pilot Program. Headquartered in Mexico, ASUR is listed both on the Mexican Bolsa, where it trades under the symbol ASUR, and on the NYSE in the U.S., where it trades under the symbol ASR. One ADS represents ten (10) series B shares. For more information, visit www.asur.com.mx.

Contacts: ASUR, Lic. Adolfo Castro, +52-55-5284-0408, acastro@asur.com.mx; InspIR Group, Susan Borinelli, +1-646-330-5907, susan@inspirgroup.com