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 March 2010

Commission File Number 1-14728

Lan Airlines S.A.

(Translation of registrant's name into English)

Av. Presidente Riesco 5711, Piso 20

Las Condes

Santiago, Chile

(Address of principal executive office)

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 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):  

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, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-  

Exhibit List

     Exhibit No.                          Description

Exhibit 99.1 Material Fact – Circular No. 574/2010

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: March 5, 2010

Lan Airlines S.A.

/s/ Cristián Toro Cañas

By: Cristian Toro Cañas

Legal Vice President

Exhibit Index

     Exhibit No.                          Description

Exhibit 99.1 Material Fact – Circular No. 574/2010

EX-99.1

Exhibit 99.1

Santiago, March 3, 2010

Mr. Guillermo Larrain Rios

Superintendent

Superintendence of Securities and Insurance

Present

Re:           Material Fact  - Circular No. 574/2010

To whom it may concern:

In accordance with Articles 9 and 10 of Law No. 18,045 concerning the Stock Market and Official Circular No. 574 of 2010 of the Superintendence of Securities and Insurance, I hereby inform you of the following material information relating to the earthquake that affected the central and southern regions of Chile on February 27, 2010:

1.            Status of Operations

1.1          Abroad

The passenger and cargo operations of Lan Airlines and its subsidiaries abroad, including Lan Cargo, Lan Peru, Lan Ecuador and Lan Argentina, are functioning normally, except for flights to and from Santiago, Chile.

1.2           In Chile

1.2.1        Passenger Operations

The Santiago airport terminal was damaged by the aforementioned earthquake.  Since there is no alternative airport in the Metropolitan Region for our domestic and international operations, commercial passenger operations were suspended until March 1, 2010.  This situation affected all airlines operating in the country.  Through March 1, 2010, only seventeen (17) international flights of Lan Airlines that had been diverted to other airports outside of Chile due to the earthquake, landed at the Santiago airport.

After a great effort and coordination with the different authorities and entities involved in the operations of the Santiago airport, a temporary passenger terminal was completed and operations could be resumed on March 2, 2010.  Lan Airlines expects approximately 45% of its regular domestic and international passenger transport operations to be operative today.  Additionally, today the domestic passenger terminal will be begin to be used for international operations, which will increase passenger transport capacity.  As a result, Lan Airlines expects approximately 60% of its regular operations in Chile to be resumed by March 7, 2010.

Domestic and international flights’ schedules are being informed by different means, in particular through our website (www.lan.com), call centers (600 526 2000) and sales offices.  Scheduled flights will be gradually increased until the achievement of normal operations.  Lan Airlines cannot estimate the amount of time required for operations to and from Santiago to be completely reestablished, as this will ultimately depend on the operative capacity of the Santiago airport.

1.2.2        Cargo Transport

The operations of Lan Cargo were not materially affected by the earthquake and Lan Cargo is operating normally because (i) operations have resumed, albeit limited in the case of passengers, (i) customs and agricultural and livestock controls of cargo and merchandise resumed on March 2, 2010, and (iii) the cargo fleet can be utilized in a flexible manner, including the rescheduling of itineraries, which permits Lan Airlines to offset the reduction in the passenger operations to and from Chile.

2.            Damage to Facilities, Plants and Other Assets

Certain Lan Airline’s buildings such as the older part of the Maintenance Base and the Corporate Building located in the southern area of the Santiago Airport, were damaged.  The earthquake also caused minor damage to five (5) aircraft and some spare parts and equipment, which are being repaired.  None of this damage has a material or relevant impact on the company’s operations.

3.           Insurance

All facilities, equipment, buildings and aircraft of Lan Airlines are insured against damage, including damages caused by fires and earthquakes.  The deductibles of damaged assets total approximately US$3,000,000.

Yours sincerely,

/s/ Cristián Toro Cañas

Legal Vice-President

cc:           Santiago Stock Exchange

Electronic Exchange of Chile

Valparaiso Stock Exchange