Cheap flights from St. Louis to Hawkesbury Valley

View AU$944 flight on Thu, 25 Sep. 2025Opens in a new window

Popular airlines from St. Louis to Hawkesbury Valley

  • American Airlines

    American Airlines

  • Delta

    Delta

  • Air Canada

    Air Canada

  • United

    United

  • Cathay Pacific

    Cathay Pacific

  • All Nippon Airways

    All Nippon Airways

  • Qantas Airways

    Qantas Airways

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Cheap Flights from St. Louis (STL) to Hawkesbury Valley (SYD)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sun, 7 Sep. - Sun, 14 Sep.
STL
St. Louis
SYD
Sydney
AU$1,722 Return, found 1 day ago
AU$1,722
Return
found 1 day ago
Select Air Canada flight, departing Sun, 7 Sep. from St. Louis to Sydney, returning Sun, 14 Sep., priced at AU$1,722 found 1 day ago
Delta
Sun, 7 Sep. - Sun, 14 Sep.
STL
St. Louis
SYD
Sydney
AU$1,730 Return, found 1 day ago
AU$1,730
Return
found 1 day ago
Select Delta flight, departing Sun, 7 Sep. from St. Louis to Sydney, returning Sun, 14 Sep., priced at AU$1,730 found 1 day ago
Air Canada
Sun, 7 Sep. - Sun, 14 Sep.
STL
St. Louis
SYD
Sydney
AU$1,730 Return, found 1 day ago
AU$1,730
Return
found 1 day ago
Select Air Canada flight, departing Sun, 7 Sep. from St. Louis to Sydney, returning Sun, 14 Sep., priced at AU$1,730 found 1 day ago
United
Sun, 7 Sep. - Sun, 14 Sep.
STL
St. Louis
SYD
Sydney
AU$1,748 Return, found 1 day ago
AU$1,748
Return
found 1 day ago
Select United flight, departing Sun, 7 Sep. from St. Louis to Sydney, returning Sun, 14 Sep., priced at AU$1,748 found 1 day ago
American Airlines
Mon, 15 Sep. - Mon, 29 Sep.
STL
St. Louis
SYD
Sydney
AU$1,769 Return, found 1 day ago
AU$1,769
Return
found 1 day ago
Select American Airlines flight, departing Mon, 15 Sep. from St. Louis to Sydney, returning Mon, 29 Sep., priced at AU$1,769 found 1 day ago
Qantas Airways
Mon, 15 Sep. - Mon, 29 Sep.
STL
St. Louis
SYD
Sydney
AU$1,806 Return, found 1 day ago
AU$1,806
Return
found 1 day ago
Select Qantas Airways flight, departing Mon, 15 Sep. from St. Louis to Sydney, returning Mon, 29 Sep., priced at AU$1,806 found 1 day ago

Find the cheapest month to fly from St. Louis (STL) to Sydney (SYD)

September is typically the cheapest month to fly

From AU$1,726 - AU$3,137 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.