Exhibit 32.1

                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER

    Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of
the Sarbanes-Oxley Act of 2002, the undersigned officer of ViaSat, Inc. (the
"Company") hereby certifies, to such officer's knowledge, that:

        (a) the accompanying Quarterly Report on Form 10-Q of the Company for
    the quarterly period ended July 1, 2005 (the "Report") fully complies with
    the requirements of Section 13(a) or Section 15(d), as applicable, of the
    Securities Exchange Act of 1934, as amended; and

        (b) the information contained in the Report fairly presents, in all
    material respects, the financial condition and results of operations of the
    Company.

    Dated: August 8, 2005                    /s/ Mark D. Dankberg
                                            --------------------
                                            Mark D. Dankberg
                                            Chief Executive Officer

                    CERTIFICATION OF CHIEF FINANCIAL OFFICER

        Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002, the undersigned officer of ViaSat, Inc. (the
"Company") hereby certifies, to such officer's knowledge, that:

        (a) the accompanying Quarterly Report on Form 10-Q of the Company for
    the quarterly period ended July 1, 2005 (the "Report") fully complies with
    the requirements of Section 13(a) or Section 15(d), as applicable, of the
    Securities Exchange Act of 1934, as amended; and

        (b) the information contained in the Report fairly presents, in all
    material respects, the financial condition and results of operations of the
    Company.

Dated: August 8, 2005                        /s/ Ronald G. Wangerin
                                            ----------------------
                                            Ronald G. Wangerin
                                            Chief Financial Officer