Book a trip from Boston to Sydney with Cathay Pacific , fares from USD1,631

DISCOUNT CODE (OPTIONAL)

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

Jul 2025
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    • Lowest fares on flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    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    		01/09/2025 - 13/09/2025

    From

    USD1,631

    Seen 1 day ago

    Boston (BOS)Sydney (SYD)Round-trip
    /
    Economy    		06/10/2025 - 20/10/2025

    From

    USD1,881

    Seen 10 hours ago

    Boston (BOS)Sydney (SYD)Round-trip
    /
    Economy    		18/12/2025 - 02/01/2026

    From

    USD3,393

    Seen 12 hours ago

    Lowest fares on round-trip flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    Book Business Class flights to Sydney - selected offers

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    Lowest fares on flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.