New South Wales

$525+ Cheap flights from St. Louis (STL) to New South Wales

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Apr 17 — Apr 241
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Cheap flight deals from St. Louis to New South Wales

Cheapest flights from St. Louis to New South Wales
Explore the most affordable flight options available from St. Louis to New South Wales. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 18, 2026.

This Air Canada deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:00 pm
STL
-
SYD
2 stops51h 20m
Air Canada
Mon 5/189:20 am
SYD
-
STL
2 stops50h 05m
Air Canada
Deal found 3/14$1,101
This Air Canada deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:05 pm
STL
-
SYD
2 stops48h 15m
Air Canada
Mon 5/49:20 am
SYD
-
STL
2 stops26h 05m
Air Canada
Deal found 3/13$1,107
This Air Canada deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/111:05 pm
STL
-
SYD
2 stops27h 15m
Air Canada
Mon 5/189:20 am
SYD
-
STL
2 stops26h 05m
Air Canada
Deal found 3/17$1,108
This Air Canada deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/101:00 pm
STL
-
SYD
2 stops51h 20m
Air Canada
Thu 5/289:20 am
SYD
-
STL
2 stops26h 05m
Air Canada
Deal found 3/15$1,109
This Air Canada deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:10 pm
STL
-
SYD
2 stops28h 10m
Air Canada
Wed 9/169:20 am
SYD
-
STL
2 stops48h 21m
Air Canada
Deal found 3/17$1,115
This Air Canada deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:10 pm
STL
-
SYD
2 stops28h 10m
Air Canada
Fri 10/2310:20 am
SYD
-
STL
2 stops48h 06m
Air Canada
Deal found 3/13$1,117
This Air Canada deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:10 pm
STL
-
SYD
2 stops52h 10m
Air Canada
Wed 11/1811:20 am
SYD
-
STL
2 stops45h 10m
Air Canada
Deal found 3/13$1,122
This Air Canada deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:10 pm
STL
-
SYD
2 stops28h 10m
Air Canada
Wed 10/710:20 am
SYD
-
STL
3 stops48h 21m
Air Canada
Deal found 3/15$1,125

Find flight deals from St. Louis to New South Wales

Keep the following information in mind while searching for St. Louis to New South Wales flight deals. Data was last updated March 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,101
(Air Canada)

One-way from

$525
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,254
Provider with most accurate pricing for Lambert-St Louis-Sydney Kingsford Smith flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Sydney Kingsford Smith flights.
From Lambert-St Louis to New South Wales
One-way flight from Lambert-St Louis to New South Wales
Highest demand for flights based on searches. 5% potential increase in price ($80 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($23 potential savings vs. average RT price).
Average for round-trip flights in March 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to New South Wales that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 18, 2026.
Use the filters below to find and compare flights from St. Louis to New South Wales that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 5/31

4:48 pm-7:00 am

2 stops23h 12m

Sydney Kingsford Smith

Tue 6/23

10:20 am-6:17 pm

1 stop22h 57m

$1,339

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/13

4:40 pm-7:00 am

2 stops23h 20m

Sydney Kingsford Smith

Tue 10/6

11:20 am-5:53 pm

1 stop22h 33m

$1,464

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/14

3:10 pm-7:00 am

2 stops24h 50m

Sydney Kingsford Smith

Wed 9/30

10:20 am-5:53 pm

1 stop22h 33m

$1,464

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/13

4:40 pm-7:00 am

2 stops23h 20m

Sydney Kingsford Smith

Wed 9/30

10:20 am-5:53 pm

1 stop22h 33m

$1,464

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/13

4:40 pm-7:00 am

2 stops23h 20m

Sydney Kingsford Smith

Sat 10/3

10:20 am-5:53 pm

1 stop22h 33m

$1,464

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 5/2

8:30 am-6:55 am

1 stop31h 25m

Sydney Kingsford Smith

Sat 5/16

10:20 am-6:22 pm

1 stop23h 02m

$1,487

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 4/19

6:21 am-7:05 am

1 stop33h 44m

Sydney Kingsford Smith

Sat 4/25

9:20 am-8:54 pm

2 stops26h 34m

$1,691

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 4/19

11:42 am-6:50 am

2 stops28h 08m

Sydney Kingsford Smith

Sat 4/25

9:15 am-3:01 pm

2 stops20h 46m

$1,766

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/27

2:40 pm-10:40 am

3 stops29h 00m

Sydney Kingsford Smith

Mon 5/4

11:55 am-8:39 am

3 stops35h 44m

$1,780
Quickest round-trip

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 5/9

3:38 pm-8:00 am

2 stops25h 22m

Sydney Kingsford Smith

Wed 5/13

12:00 pm-5:21 pm

1 stop20h 21m

$1,846

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Best time to book a flight from St. Louis to New South Wales

Have a flexible travel schedule? Discover the best time to fly to New South Wales from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to New South Wales

What is the cheapest month to book a flight from St. Louis to New South Wales?

Currently, August is the cheapest month in which you can book a flight from St. Louis to New South Wales (average of $649). Flying from St. Louis to New South Wales in June is currently the most expensive (average of $1,281). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from St. Louis to New South Wales?

Reviews of airlines servicing New South Wales

Get insights into the airlines that provide service to New South Wales. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to New South Wales. Reviews last updated March 18, 2026.
Read through reviews of airlines operating flights from St. Louis to New South Wales, such as Fiji Airways,Qantas Airways, andUnited Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.5

Food

7.5

Overall

8.1

Comfort

8.1

Crew

8.5

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Feb 2026

SFO - NAN

Very friendly staff, warm service, well maintained aircraft, comfortable seats, and reliable on-time performance 👍👍

Entertainment

7.5

Food

7.5

Overall

8.1

Comfort

8.1

Crew

8.5

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Feb 2026

SFO - NAN

Very friendly staff, warm service, well maintained aircraft, comfortable seats, and reliable on-time performance 👍👍

Entertainment

7.5

Food

7.5

Overall

8.1

Comfort

8.1

Crew

8.5

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Feb 2026

SFO - NAN

Very friendly staff, warm service, well maintained aircraft, comfortable seats, and reliable on-time performance 👍👍

Entertainment

7.5

Food

7.5

Overall

8.1

Comfort

8.1

Crew

8.5

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Feb 2026

SFO - NAN

Very friendly staff, warm service, well maintained aircraft, comfortable seats, and reliable on-time performance 👍👍

Entertainment

7.5

Food

7.5

Overall

8.1

Comfort

8.1

Crew

8.5

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Feb 2026

SFO - NAN

Very friendly staff, warm service, well maintained aircraft, comfortable seats, and reliable on-time performance 👍👍

Related info for your journey

Find useful and relevant information for your journey from St. Louis to New South Wales. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from St. Louis to New South Wales?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to New South Wales from St. Louis.

  • How long is the flight from St. Louis to New South Wales?

    Departing from St. Louis to New South Wales will take you 23h 12m. St. Louis and New South Wales are separated by a distance of 9054 mi.

  • Can I find deals for flights from St. Louis to New South Wales that include hotel bookings?

    Yes. In addition to deals on St. Louis to New South Wales flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to New South Wales?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to New South Wales.

  • Can I find deals for business class flights from St. Louis to New South Wales?

    Yes. Cheapflights offers flight deals from St. Louis to New South Wales by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to New South Wales?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to New South Wales (average of $649). Flying from St. Louis to New South Wales in June is currently the most expensive (average of $1,281). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from St. Louis to New South Wales

Discover the top 4 airlines that operate flights from St. Louis to New South Wales. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,094Average$1,305FlexibilityNo cancel feeOn-time74%
Fiji AirwaysCheapest$1,132Average$1,222FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,144Average$1,511FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,233Average$1,497FlexibilityNo cancel feeOn-time71%

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