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 September 2021

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: September 7, 2021

Exhibit 99.1

ASUR Announces Total Passenger Traffic for August 2021

Compared with pre-pandemic levels of August 2019, passenger traffic declined 8.4% in Mexico and 7.6% in Colombia, and increased 14.8% in Puerto Rico

MEXICO CITY, Sept. 7, 2021 /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 total passenger traffic for August 2021 reached a total of 4.6 million passengers, 4.3% below the levels reported in August 2019, reflecting a continued recovery in travel demand in general and the rollout of vaccination campaigns in the US and gradual advances in Mexico, despite restrictions and requirements in certain countries of the world to contain the spread of the virus.

When compared to pre-pandemic levels of August 2019, passenger traffic declined 8.4% in Mexico and 7.6% in Colombia, while traffic in Puerto Rico increased 14.8%.

This announcement reflects comparisons between August 1 through August 31, 2021, from August 1 through August 31, 2020 and August 1 through August 31, 2019. Transit and general aviation passengers are excluded for 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:

ASURLic. Adolfo Castro

+52-55-5284-0408

acastro@asur.com.mx

InspIR Group

Susan Borinelli

+1-646-330-5907

susan@inspirgroup.com