<SEC-DOCUMENT>0001562180-22-002642.txt : 20220315
<SEC-HEADER>0001562180-22-002642.hdr.sgml : 20220315
<ACCEPTANCE-DATETIME>20220315162019
ACCESSION NUMBER:		0001562180-22-002642
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220302
FILED AS OF DATE:		20220315
DATE AS OF CHANGE:		20220315

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Norwood Anthony R
		CENTRAL INDEX KEY:			0001916973

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-49983
		FILM NUMBER:		22741353

	MAIL ADDRESS:	
		STREET 1:		11465 JOHNS CREEK PARKWAY
		CITY:			JOHNS CREEK
		STATE:			GA
		ZIP:			30097

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SAIA INC
		CENTRAL INDEX KEY:			0001177702
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING (NO LOCAL) [4213]
		IRS NUMBER:				481229851
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		11465 JOHNS CREEK PARKWAY
		STREET 2:		STE 400
		CITY:			JOHNS CREEK
		STATE:			GA
		ZIP:			30097
		BUSINESS PHONE:		7702325067

	MAIL ADDRESS:	
		STREET 1:		11465 JOHNS CREEK PARKWAY
		STREET 2:		STE 400
		CITY:			JOHNS CREEK
		STATE:			GA
		ZIP:			30097

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCS TRANSPORTATION INC
		DATE OF NAME CHANGE:	20020717
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primarydocument.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2022-03-02</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001177702</issuerCik>
        <issuerName>SAIA INC</issuerName>
        <issuerTradingSymbol>SAIA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001916973</rptOwnerCik>
            <rptOwnerName>Norwood Anthony R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>11465 JOHNS CREEK PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 400</rptOwnerStreet2>
            <rptOwnerCity>JOHNS CREEK</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30097</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>EVP &amp; CHRO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Kelly W. Benton</signatureName>
        <signatureDate>2022-03-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
