6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20546

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUERPURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGEACT OF 1934

For the month of May, 2025

Commission File Number: 333-274239

Corporación América AirportsS.A.

(Name of Registrant)

128, Boulevard de la PétrusseL-2330, LuxembourgTel: +35226258274

(Address of Principal Executive Office)

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

Form 20-F x          Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

INFORMATION CONTAINED IN THIS FORM 6-KREPORT

On May 28, 2025, Corporación América Airports S.A. (“CAAP”) and the Investment Corporation of Dubai (“ICD”), the principal investment arm of the Government of Dubai, entered into a transaction agreement whereby: (i) Dicasa S.A. (“Dicasa”), a wholly-owned subsidiary of CAAP, acquired shares representing 25% of the capital interest in Corporación América Italia S.p.A. (the “CAI Shares”) from Mataar Holdings 2 B.V., a wholly-owned subsidiary of ICD, and (ii) as consideration of the CAI Shares, CAAP delivered 1,996,439 newly issued shares to ICD (the “CAAP Shares”). Following completion of the transaction, CAAP will own 100% of Corporación América Italia S.p.A.

The transaction agreement further contemplates certain transfer restrictions over the CAAP Shares, including a 40-day lock-up period and certain volume sale restrictions thereafter, and customary “piggyback” registration rights in favor of ICD.

Exhibit Index

SIGNATURES

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.

Exhibit 99.1

CAAPIncreases Stake in Corporación América Italia S.p.A.

Luxembourg,May 28, 2025— Corporación América Airports S.A. (NYSE: CAAP), (“CAAP” or the “Company”), one of the world’s leading private airport operators, announced today that it has acquired, through its Spanish subsidiary Dicasa Spain S.A.U., the remaining 25% interest in Corporación América Italia S.p.A. (“CAI”) from the Investment Corporation of Dubai (“ICD”), thereby increasing its total interest in CAI to 100%. CAI holds a 62.28% interest in Toscana Aeroporti S.p.A. (“TA”), the Company’s subsidiary that operates the Pisa and Florence airports.

The transaction was completed through a share swap agreement, with CAAP delivering 1,996,439 newly issued shares to ICD as consideration for the 25% interest in CAI. To ensure a fair valuation, an internationally recognized firm was engaged to provide an independent fairness opinion.

With this acquisition, CAAP has increased its indirect economic interest in Toscana Aeroporti S.p.A. by 15.6%, further strengthening its strategic position in the Italian airport sector.

About CorporaciónAmérica Airports

Corporación América Airports acquires, develops and operates airport concessions. Currently, the Company operates 52 airports in 6 countries across Latin America and Europe (Argentina, Brazil, Uruguay, Ecuador, Armenia and Italy). In 2024, Corporación América Airports served 79.0 million passengers, 2.7% (or 0.4% excluding Natal) below the 81.1 million passengers served in 2023, and 6.2% below the 84.2 million served in 2019. The Company is listed on the New York Stock Exchange where it trades under the ticker “CAAP”. For more information, visit http://investors.corporacionamericaairports.com

Investor Relations Contact

Patricio IñakiEsnaola

Email: patricio.esnaola@caairports.com

Phone: +5411 4899-6716