Book a trip from Boston to Sydney with Cathay Pacific , fares from USD2,514

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Deals on Boston (BOS) to Sydney (SYD) flights

Try alternate month or interact with individual days below in order to find offers.
Jun 2026
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Aug 2026
FromUSD2,514*
Seen 3 minutes ago
Round trip/Economy
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    • Best fares on flights found by others in the last 48 hours. (Please note that some fares may only apply when there are multiple travellers.)

    Book flights to Sydney SYD

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    Book flights to Sydney SYD
    From
    To
    Fare Type
    Dates
    Price
    Boston (BOS)Sydney (SYD)Round-trip
    /
    Economy    		25/08/2026 - 09/09/2026

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    USD2,514

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    Book Business Class flights to Sydney - selected offers

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