AZUL Azul SA

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, 2019

Commission File Number: 001-38049

Azul S.A.

(Name of Registrant)

Edifício Jatobá, 8th floor, Castelo Branco Office Park

Avenida Marcos Penteado de Ulhôa Rodrigues, 939

Tamboré, Barueri, São Paulo, SP 06460-040, Brazil.

+55 (11) 4831 2880

 (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):

Yes ¨                     No x

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):

Yes ¨                     No x

Azul Reports September 2019 Traffic

São Paulo, October 7, 2019 – Azul S.A., “Azul”, (B3: AZUL4, NYSE: AZUL), the largest airline in Brazil by number of cities served and flight departures, announces today its preliminary traffic results for September 2019.

Consolidated passenger traffic (RPKs) increased 31.0% compared to September 2018 on a capacity increase (ASKs) of 30.8%, resulting in a load factor of 83.3%, an increase of 0.1 percentage points compared to the same period in 2018. Domestic load factor was 82.1% and international load factor was 87.7%.

In the third quarter, consolidated RPKs increased 27.1% on a capacity increase of 26.1% year over year.

“In September we continued to demonstrate our ability to match capacity with demand by growing more than 30% while maintaining high load factors. We received our 32nd A320neo and are very excited with the delivery of our first E915-E2, both of which are key drivers of our margin expansion going forward”, says John Rodgerson, Azul’s CEO.

About Azul

Azul S.A. (B3: AZUL4, NYSE: AZUL), the largest airline in Brazil by number of flight departures and cities served, offers 910 daily flights to 112 destinations. With an operating fleet of 132 aircraft and more than 12,000 crewmembers, the Company has a network of 237 non-stop routes as of September 30, 2019. In 2019, Azul was awarded best airline in Latin America by TripAdvisor Travelers’ Choice and also best regional carrier in South America for the ninth consecutive time by Skytrax. In 2018, the Company was elected best airline by Kayak’s Flight Hacker Guide. Azul also ranked as most on-time airline in Brazil in 2018 according to FlightStats. For more information visit www.voeazul.com.br/ir.    

Glossary

Revenue Passenger Kilometers (RPK)

One-fare paying passenger transported one kilometer. RPK is calculated by multiplying the number of revenue passengers by the number of kilometers flown.

Available Seat Kilometers (ASK)

Number of aircraft seats multiplied by the number of kilometers flown.

Contact

Investor Relations

Tel: +55 11 4831 2880

invest@voeazul.com.br

Media Relations

Tel: +55 11 4831 1245

imprensa@voeazul.com.br

This traffic release includes estimates and forward-looking statements within the meaning of the U.S. federal securities laws. These estimates and forward-looking statements are based mainly on our current expectations and estimates of future events and trends that affect or September affect our business, financial condition, results of operations, cash flow, liquidity, prospects and the trading price of our preferred shares, including in the form of ADSs. Although we believe that these estimates and forward-looking statements are based upon reasonable assumptions, they are subject to many significant risks, uncertainties and assumptions and are made in light of information currently available to us. In addition, in this release, the words “September,” “will,” “estimate,” “anticipate,” “intend,” “expect,” “should” and similar words are intended to identify forward-looking statements. You should not place undue reliance on such statements, which speak only as of the date they were made. Azul is not under the obligation to update publicly or to revise any forward-looking statements after we distribute this press release because of new information, future events or other factors.  Our independent public auditors have neither examined nor compiled the forward-looking statements and, accordingly, do not provide any assurance with respect to such statements.  In light of the risks and uncertainties described above, the future events and circumstances discussed in this release might not occur and are not guarantees of future performance. Because of these uncertainties, you should not make any investment decision based upon these estimates and forward-looking statements.