-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 QHUW4Ui5bYz3JgNxs3MTP89SjCaNzo9IKfvR1ixyJb6wziceW+LC3X8FJS2nkMds
 VyZJs19tDraG8pFLBckk1w==

<SEC-DOCUMENT>0001233358-05-000001.txt : 20050523
<SEC-HEADER>0001233358-05-000001.hdr.sgml : 20050523
<ACCEPTANCE-DATETIME>20050523200415
ACCESSION NUMBER:		0001233358-05-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050519
FILED AS OF DATE:		20050523
DATE AS OF CHANGE:		20050523

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WILLIS LEASE FINANCE CORP
		CENTRAL INDEX KEY:			0001018164
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-MACHINERY, EQUIPMENT & SUPPLIES [5080]
		IRS NUMBER:				680070656
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2320 MARINSHIP WAY
		STREET 2:		STE 300
		CITY:			SAUSALITO
		STATE:			CA
		ZIP:			94965
		BUSINESS PHONE:		4153315281

	MAIL ADDRESS:	
		STREET 1:		2320 MARINSHIP WAY
		STREET 2:		SUITE 300
		CITY:			SAUSALITO
		STATE:			CA
		ZIP:			94965

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LAVIEC GERARD
		CENTRAL INDEX KEY:			0001233358

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15369
		FILM NUMBER:		05852710

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		4153315281

	MAIL ADDRESS:	
		STREET 1:		WILLIS LEASE FINANCE CORP
		STREET 2:		2320 MARINSHIP WAY 3RD FL
		CITY:			SAUSALITO
		STATE:			CA
		ZIP:			94965
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-05-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001018164</issuerCik>
        <issuerName>WILLIS LEASE FINANCE CORP</issuerName>
        <issuerTradingSymbol>wlfc</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001233358</rptOwnerCik>
            <rptOwnerName>LAVIEC GERARD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>WILLIS LEASE FINANCE CORP</rptOwnerStreet1>
            <rptOwnerStreet2>2320 MARINSHIP WAY 3RD FL</rptOwnerStreet2>
            <rptOwnerCity>SAUSALITO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94965</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-qualified stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>8.4</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-05-19</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2005-05-19</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3921</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8.4</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-05-19</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-05-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3921</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>34150</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These options vest one year from the grant date, but are immediately exercisable.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Brian D. Hanson for Gerard Laviec</signatureName>
        <signatureDate>2005-05-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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