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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 FOGHyukx7MI8A6KWgMDHLa11yEEPycAT3AaLl7BBd3NGKj1ZUXQpB4xTEFxxCcei
 V/8GipEW9YgV2Vu+W7RB8w==

<SEC-DOCUMENT>0001127602-10-009190.txt : 20100319
<SEC-HEADER>0001127602-10-009190.hdr.sgml : 20100319
<ACCEPTANCE-DATETIME>20100319170004
ACCESSION NUMBER:		0001127602-10-009190
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100318
FILED AS OF DATE:		20100319
DATE AS OF CHANGE:		20100319

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Mikells Kathryn A
		CENTRAL INDEX KEY:			0001448903

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06033
		FILM NUMBER:		10694740

	MAIL ADDRESS:	
		STREET 1:		77 W. WACKER DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UAL CORP /DE/
		CENTRAL INDEX KEY:			0000100517
		STANDARD INDUSTRIAL CLASSIFICATION:	AIR TRANSPORTATION, SCHEDULED [4512]
		IRS NUMBER:				362675207
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		JOHN LAKOSIL - WHQLD
		STREET 2:		77 W. WACKER
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601
		BUSINESS PHONE:		312-997-8000

	MAIL ADDRESS:	
		STREET 1:		JOHN LAKOSIL - WHQLD
		STREET 2:		77 W. WACKER
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEGIS CORP
		DATE OF NAME CHANGE:	19880613

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UAL INC
		DATE OF NAME CHANGE:	19870517
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-03-18</periodOfReport>

    <issuer>
        <issuerCik>0000100517</issuerCik>
        <issuerName>UAL CORP /DE/</issuerName>
        <issuerTradingSymbol>UAUA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001448903</rptOwnerCik>
            <rptOwnerName>Mikells Kathryn A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 66100 - HDQLD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60666</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>EVP - Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-03-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2942</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>19.56</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>34366</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks>The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan.</remarks>

    <ownerSignature>
        <signatureName>/s/ Lydia J. Mathas for Kathryn A. Mikells</signatureName>
        <signatureDate>2010-03-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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