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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 VioH9rcWMFW7Lamk5qDpTTo1HkJP5AiKinpLCHOR0ewmIapCfZ87Smmcx7yRgOE5
 0QJOgNGL2YbZnmV/9+qRnQ==

<SEC-DOCUMENT>0001209191-03-021135.txt : 20030911
<SEC-HEADER>0001209191-03-021135.hdr.sgml : 20030911
<ACCEPTANCE-DATETIME>20030911152427
ACCESSION NUMBER:		0001209191-03-021135
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030911
FILED AS OF DATE:		20030911

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LAY B ALLEN
		CENTRAL INDEX KEY:			0001205479

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21767
		FILM NUMBER:		03891914

	BUSINESS ADDRESS:	
		STREET 1:		6155 EL CAMINO REAL
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92009

	MAIL ADDRESS:	
		STREET 1:		6155 EL CAMINO REAL
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92009

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VIASAT INC
		CENTRAL INDEX KEY:			0000797721
		STANDARD INDUSTRIAL CLASSIFICATION:	RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT [3663]
		IRS NUMBER:				330174996
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			0402

	BUSINESS ADDRESS:	
		STREET 1:		6155 EL CAMINO REAL
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92009
		BUSINESS PHONE:		760-476-2200

	MAIL ADDRESS:	
		STREET 1:		6155 EL CAMINO REAL
		CITY:			CARLSBAD
		STATE:			CA
		ZIP:			92009
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-09-11</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000797721</issuerCik><issuerName>VIASAT INC</issuerName>        <issuerTradingSymbol>vsat</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001205479</rptOwnerCik><rptOwnerName>LAY B ALLEN</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>6155 EL CAMINO REAL</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>CARLSBAD</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>92009</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>common 
stock option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>16.27</value></conversionOrExercisePrice><transactionDate><value>2003-09-11</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>10000</value></transactionShares><transactionPricePerShare><value>16.27</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F1" /></exerciseDate><expirationDate><value>2013-09-11</value><footnoteId id="F1" /></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>common stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>10000</value></underlyingSecurityShares></underlyingS
ecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>32001</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>see footnote</value><footnoteId id="F2" /></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">The option vests in three equal annual installments beginning on September 11, 2004.</footnote><footnote id="F2">The options are vested in the name of Lay Ventures, L.P.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>B. Allen Lay</signatureName><signatureDate>2003-09-11</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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