Report of Foreign Issuer (6-k)

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For the month of June, 2018

(Commission File No. 001-32221) ,

GOL LINHAS AÉREAS INTELIGENTES S.A.

(Exact name of registrant as specified in its charter)

GOL INTELLIGENT AIRLINES INC.

(Translation of Registrant's name into English)

Praça Comandante Linneu Gomes, Portaria 3, Prédio 24
Jd. Aeroporto
04630-000 São Paulo, São Paulo
Federative Republic of Brazil

(Address of Regristrant's principal executive offices)

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

Form 20-F ___X___ 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.

Yes ______ No ___X___

If "Yes" is marked, indicated below the file number assigned to the
registrant in connection with Rule 12g3-2(b):

São Paulo, June 6, 2018 - GOL Linhas Aéreas Inteligentes S.A., (NYSE: GOL and B3: GOLL4) , announces today preliminary air traffic figures for the month of May, 2018 . Comparisons refer to the same period of 2017.

Highlights

| The total volume of GOL departures increased by 1.2% and the number of seats was up 1.9% in May, resulting in an increase in total supply (ASKs) of 0.4%. GOL’s total load factor was 76.8% in May 2018, 0.2 p.p up over the same period of 2017, due to the growth in GOL's total demand (RPK) of 0.7% in the period.

| In the domestic market, volume of departures and number of seats increased by 2.1% and 2.9%, respectively over May 2017, resulting in an increase in GOL domestic supply (ASK) of 1.5%. GOL domestic demand (RPK) grew by 2.6% and GOL’s domestic load factor was up 0.8 p.p in comparison to the same month of the previous year, achieving 77.7%.

| In May 2018, GOL’s international market supply (ASK) and demand (RPK) decreased by 9.2% and 16.5%, respectively, decreasing international load factor by 5.9 p.p. in relation to May 2017.

	Monthly Traffic Figures (¹)			Accumulated Traffic Figures (¹)			LTM Traffic Figures (¹)
Operational data *	May/18	May/17	% Var.	5M18	5M17	% Var.	May/18 LTM	May/17 LTM	% Var.
Total GOL
Departures	20,164	19,918	1.2%	103,686	102,968	0.7%	251,371	249,490	0.8%
Seats (thousand)	3,394	3,329	1.9%	17,394	17,233	0.9%	42,114	41,714	1.0%
ASK (million)	3,584	3,571	0.4%	19,462	19,020	2.3%	47,137	46,004	2.5%
RPK (million)	2,752	2,734	0.7%	15,505	15,007	3.3%	37,729	36,101	4.5%
Load Factor	76.8%	76.6%	0.2 p.p	79.7%	78.9%	0.8 p.p	80.0%	78.5%	1.5 p.p
Pax on board (thousand)	2,543	2,483	2.4%	13,364	13,157	1.6%	32,825	31,807	3.2%
Domestic GOL
Departures	19,270	18,8 74	2.1%	97,416	97,135	0.3%	236,774	235,359	0.6%
Seats (thousand)	3,236	3,145	2.9%	16,379	16,201	1.1%	39,628	39,214	1.1%
ASK (million)	3,245	3,197	1.5%	17,094	16,915	1.1%	41,637	40,925	1.7%
RPK (million)	2,522	2,458	2.6%	13,688	13,363	2.4%	33,571	32,260	4.1%
Load Factor	77.7%	76.9%	0.8 p.p	80.1%	79.0%	1.1 p.p	80.6%	78.8%	1.8 p.p
Pax on board (thousand)	2,437	2,351	3.7%	12,524	12,357	1.4%	30,896	29,949	3.2%
International GOL
Departures	894	1,044	-14.4%	6,270	5,833	7.5%	14,597	14,131	3.3%
Seats (thousand)	158	185	-14.5%	1,015	1,032	-1.7%	2,486	2,500	-0.5%
ASK (million)	339	373	-9.2%	2,369	2,105	12.5%	5,500	5,079	8.3%
RPK (million)	230	276	-16.5%	1,817	1,644	10.5%	4,157	3,840	8.3%
Load Factor	68.0%	73.9%	-5.9 p.p	76.7%	78.1%	-1.4 p.p	75.6%	75.6%	0.0 p.p
Pax on board (thousand)	106	132	-19.9%	840	800	5.1%	1,929	1,858	3.8%
On-time Departures	93.8%	95.8%	-2.0 p.p	94.2%	95.2%	-1.0 p.p	94.3%	94.6%	-0.3 p.p
Flight Completion	98.8%	98.0%	0.8 p.p	98.3%	98.5%	-0.2 p.p	98.4%	98.2%	0.2 p.p
Cargo Ton	9.3	9.1	3.2%	43.9	40.6	8.9%	106.4	98.7	7.8%

* Source: Agência Nacional de Aviação Civil (ANAC) and the Company for the current month.

(1) Preliminary Figures

Investor Relations

ri@voegol.com.br

www.voegol.com.br/ir

+55 (11) 2128-4700

About GOL Linhas Aéreas Inteligentes S.A.

GOL serves more than 30 million passengers annually. With Brazil’s largest network, GOL offers customers more than 700 daily flights to 66 destinations in 10 countries in South America and the Caribbean. GOLLOG is a leading cargo transportation and logistics business serving more than 3,400 Brazilian municipalities and, through partners, more than 200 international destinations in 95 countries. SMILES is one of the largest coalition loyalty programs in Latin America, with over 13 million registered participants, allowing clients to accumulate miles and redeem tickets for more than 700 locations worldwide. Headquartered in São Paulo, GOL has a team of more than 15,000 highly skilled aviation professionals and operates a fleet of 120 Boeing 737 aircraft, with a further 120 Boeing 737 MAX on order, delivering Brazil's top on-time performance and an industry leading 17 year safety record. GOL has invested billions of reais in facilities, products and services and technology to enhance the customer experience in the air and on the ground. GOL's shares are traded on the NYSE (GOL) and the B3 (GOLL4). For further information, visit www.voegol.com.br/ir .

SIGNATURE

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 6, 2018

GOL LINHAS AÉREAS INTELIGENTES S.A.


By:	/S/ Richard Freeman Lark Junior
	Name: Richard Freeman Lark Junior Title: Investor Relations Officer

FORWARD-LOOKING STATEMENTS

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates offuture economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will a ctually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.