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 June, 2026

Commission File Number: 333-221916

CorporaciónAmérica Airports S.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): ¨

Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

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): ¨

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant’s “home country”), or under the rules of the home country exchange on which the registrant’s securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant’s security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

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.

Date: June 18, 2026

Corporación America Airports S.A.
By:	/s/ Andres Zenarruza
Name:	Andres Zenarruza
Title:	Head of Legal & Compliance
By:	/s/ Jorge Arruda
Name:	Jorge Arruda
Title:	Chief Financial Officer

Exhibit Index

Exhibit No.	Description
99.1	Press release dated June 18, 2026 - Corporación América Airports S.A. Reports May 2026 Passenger Traffic.

Exhibit 99.1

CorporaciónAmérica Airports S.A. Reports May 2026 Passenger Traffic

Total passenger traffic broadly stable YoY

International passenger traffic up 7.3% YoY; up 7.2% YoY in Argentina

Luxembourg,June 18, 2026— Corporación América Airports S.A. (NYSE: CAAP), (“CAAP” or the “Company”), one of the world’s leading private airport operators, reported today a 0.2% year-on-year (YoY) decrease in passenger traffic in May 2026.

PassengerTraffic, Cargo Volume and Aircraft Movements Highlights (2026 vs. 2025)

Statistics		May'26			May'25			% Var.			YTD’26			YTD’25			% Var.
Domestic Passengers (thousands)		3,206			3,502			-8.5	%		17,267			17,671			-2.3	%
International Passengers (thousands)		2,991			2,787			7.3	%		14,850			13,366			11.1	%
Transit Passengers (thousands)		691			614			12.5	%		3,646			3,132			16.4	%
Total Passengers (thousands)	****	6,888	****	****	6,903	****	****	-0.2	%	****	35,762	****	****	34,169	****	****	4.7	%
Cargo Volume (thousand tons)	****	33	****	****	34	****	****	-2.7	%	****	166	****	****	162	****	****	2.3	%
Total Aircraft Movements (thousands)	****	71	****	****	71	****	****	-1.1	%	****	355	****	****	349	****	****	1.7	%

MonthlyPassenger Traffic Performance

(Inmillion PAX)

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PassengerTraffic Overview

Totalpassenger traffic decreased slightly by 0.2% in May compared to the same month in 2025. Domestic traffic declined by 8.5% year over year, primarily driven by lower traffic in Argentina. International traffic, meanwhile, increased by 7.3%, with all operating countries contributing positively on a year-over-year basis except Brazil. Growth was supported by mid- to high-single-digit increases in Uruguay, Argentina, Italy, and Ecuador, as well as double-digit growth in Armenia, despite traffic being partially affected by disruptions related to the conflict in Iran, which resulted in flight cancellations and airspace restrictions across the region.

In Argentina, total passenger traffic decreased by 5.7% year over year in May, as growth in international traffic was more than offset by a decline in domestic traffic volumes. Domestic traffic declined by 12.2% year over year, mainly driven by reduced capacity at Flybondi, which operated only three aircraft during the month, and JetSMART, which experienced lower activity due to scheduled maintenance. This was partially offset by increased activity from Aerolíneas Argentinas. The top three domestic destinations were Córdoba, Mendoza and Iguazú. International traffic remained robust, increasing by 7.2% year over year, supported by strong performance at Córdoba Airport and increased capacity from LATAM Airlines, which recorded double-digit year-over-year growth. During May, Arajet announced a new Mendoza–Punta Cana route with three weekly frequencies, while Plus Ultra announced a new Madrid–Ezeiza route with two weekly frequencies, scheduled to commence operations on July 2. The top three international destinations in May were Santiago de Chile, São Paulo, and Madrid.

In Italy, passenger traffic increased by 5.6% year over year, reflecting growth across both the international and domestic segments. International traffic, which represented more than 80% of total passenger volumes, grew by 6.6%, supported by strong demand at both airports, led by Pisa International Airport. Domestic traffic also expanded, rising by 1.3%, with positive contributions from both Pisa and Florence airports.

In Brazil, total passenger traffic increased by 3.6% year over year. Domestic traffic, which accounted for almost 60% of total traffic, declined by 1.9% year over year, while transit passengers increased by a strong 14.7% year over year. Brasília International Airport continues to benefit from its position as a key secondary hub within the domestic network.

In Uruguay, total passenger traffic, predominantly international, increased by 7.0% year over year. Among other developments, Azul Linhas Aéreas Brasileiras recently launched a new Montevideo–Belo Horizonte route, operating two weekly frequencies.

In Ecuador, passenger traffic increased by 2.6% year over year despite ongoing security concerns. International traffic grew by 5.5%, reflecting strong demand on U.S. routes and increased frequencies operated by American Airlines, Avianca, and LATAM Airlines. Domestic traffic remained broadly stable, as elevated airfares continued to constrain travel demand.

In Armenia, passenger traffic increased by a strong 12.7% year over year, despite disruptions related to the conflict in Iran, which resulted in flight cancellations and airspace restrictions across the region. However, the impact was more limited than initially expected, with traffic from Western and Eastern Europe, Asia, and Russia supporting overall growth. The new Wizz Air base at Zvartnots International Airport, launched in late 2025, continued to support connectivity with Europe.

CargoVolume and Aircraft Movements

Cargovolume, decreased by 2.7% year over year, as growth in Argentina and Armenia was more than offset by declines in Italy, Ecuador, Uruguay, and Brazil. By country, performance was as follows: Argentina (+3.4%), Armenia (+0.6%), Brazil (-2.1%), Italy (-10.8%), Ecuador (-17.7%), and Uruguay (-18.9%). Argentina, Brazil, and Ecuador accounted for nearly 80% of total cargo volumes in May.

Aircraftmovements declined by 1.1% year over year, as positive contributions from Armenia, Italy, and Brazil were more than offset by declines in Ecuador, Argentina, and Uruguay. Performance by country was as follows: Armenia (+7.9%), Italy (+2.6%), Brazil (+2.2%), Uruguay (-0.8%), Argentina (-3.4%), and Ecuador (-4.4%). Argentina, Brazil, and Italy accounted for more than 80% of total aircraft movements in May.

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SummaryPassenger Traffic, Cargo Volume and Aircraft Movements (2026 vs. 2025)

Passenger Traffic (thousands)	May'26	May'25	% Var.		YTD'26	YTD'25	% Var.
Argentina	3,340	3,540	-5.7	%	19,823	19,366	2.4	%
Italy	1,034	979	5.6	%	3,736	3,507	6.5	%
Brazil	1,405	1,357	3.6	%	6,981	6,414	8.8	%
Uruguay	181	169	7.0	%	1,046	1,013	3.2	%
Ecuador	401	390	2.6	%	2,050	1,926	6.4	%
Armenia	527	468	12.7	%	2,127	1,942	9.6	%
TOTAL	6,888	6,903	-0.2	%	35,762	34,169	4.7	%
Cargo Volume (tons)
---	---	---	---	---	---	---	---	---
Argentina	17,482	16,909	3.4	%	88,957	84,103	5.8	%
Italy	955	1,071	-10.8	%	4,416	5,344	-17.4	%
Brazil	5,434	5,553	-2.1	%	25,703	26,158	-1.7	%
Uruguay	2,780	3,427	-18.9	%	13,770	14,651	-6.0	%
Ecuador	2,815	3,420	-17.7	%	13,973	15,439	-9.5	%
Armenia	3,233	3,216	0.6	%	18,752	16,093	16.5	%
TOTAL	32,700	33,595	-2.7	%	165,571	161,787	2.3	%
AircraftMovements
Argentina	35,975	37,259	-3.4	%	196,791	195,577	0.6	%
Italy	9,225	8,995	2.6	%	33,358	31,717	5.2	%
Brazil	12,884	12,602	2.2	%	62,389	59,425	5.0	%
Uruguay	2,461	2,480	-0.8	%	15,338	15,387	-0.3	%
Ecuador	6,108	6,390	-4.4	%	31,296	32,020	-2.3	%
Armenia	3,885	3,600	7.9	%	15,886	15,168	4.7	%
TOTAL	70,538	71,326	-1.1	%	355,058	349,294	1.7	%

AboutCorporación América 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 2025, Corporación América Airports served 86.7 million passengers, 9.8% above the 79.0 million passengers served in 2024. 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.

InvestorRelations Contact

Patricio Iñaki Esnaola

Email: [email protected]

Phone: +5411 4899-6716

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