New South Wales

$554+ 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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 17 — May 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 April 17, 2026.

This United Airlines deal was found by Cheapflights users on 4/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:30 am
STL
-
SYD
1 stop31h 25m
United Airlines
Mon 5/1810:20 am
SYD
-
STL
1 stop23h 02m
United Airlines
Deal found 4/17$1,304
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:50 am
STL
-
SYD
2 stops29h 00m
Delta
Mon 5/189:15 am
SYD
-
STL
2 stops26h 54m
Delta
Deal found 4/16$1,307
This oojo deal was found by Cheapflights users on 4/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:11 pm
STL
-
SYD
1 stop21h 44m
Qantas Airways
Mon 5/185:50 pm
SYD
-
STL
1 stop21h 09m
Qantas Airways
Deal found 4/16$1,363
This oojo deal was found by Cheapflights users on 4/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:11 pm
STL
-
SYD
1 stop21h 44m
Qantas Airways
Wed 11/182:05 pm
SYD
-
STL
1 stop19h 35m
Qantas Airways
Deal found 4/14$1,382
This oojo deal was found by Cheapflights users on 4/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:35 pm
STL
-
SYD
1 stop24h 20m
Qantas Airways
Mon 9/1412:00 pm
SYD
-
STL
1 stop21h 14m
Qantas Airways
Deal found 4/16$1,383
This oojo deal was found by Cheapflights users on 4/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/226:35 am
STL
-
SYD
2 stops35h 45m
Qantas Airways
Wed 7/812:00 pm
SYD
-
STL
1 stop19h 33m
Qantas Airways
Deal found 4/13$1,388
This oojo deal was found by Cheapflights users on 4/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:11 pm
STL
-
SYD
1 stop21h 44m
Qantas Airways
Mon 5/1112:00 pm
SYD
-
STL
1 stop22h 30m
Qantas Airways
Deal found 4/15$1,394
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:21 am
STL
-
SYD
2 stops35h 59m
Qantas Airways
Tue 5/1912:00 pm
SYD
-
STL
1 stop20h 21m
Qantas Airways
Deal found 4/14$1,411
This oojo deal was found by Cheapflights users on 4/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:11 pm
STL
-
SYD
1 stop21h 44m
Qantas Airways
Wed 5/1312:00 pm
SYD
-
STL
1 stop20h 21m
Qantas Airways
Deal found 4/14$1,413
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:06 pm
STL
-
SYD
1 stop20h 49m
United Airlines
Wed 11/1811:50 am
SYD
-
STL
1 stop23h 48m
United Airlines
Deal found 4/16$1,417
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:33 pm
STL
-
SYD
2 stops24h 32m
American Airlines
Wed 11/182:05 pm
SYD
-
STL
1 stop19h 35m
American Airlines
Deal found 4/16$1,418

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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,304
(United Airlines)

One-way from

$554
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,391
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 ($75 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($19 potential savings vs. average RT price).
Average for round-trip flights in April 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 April 17, 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

Mon 5/4

9:26 am-6:50 am

2 stops30h 24m

Sydney Kingsford Smith

Mon 5/18

9:15 am-7:03 pm

2 stops24h 48m

$1,307
Quickest round-trip

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 5/31

7:23 pm-6:55 am

1 stop20h 32m

Sydney Kingsford Smith

Sun 6/7

10:20 am-6:17 pm

1 stop22h 57m

$1,417

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/4

2:35 pm-6:55 am

2 stops25h 20m

Sydney Kingsford Smith

Mon 5/18

10:20 am-6:22 pm

1 stop23h 02m

$1,493

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 10/13

7:00 am-7:30 am

2 stops32h 30m

Sydney Kingsford Smith

Fri 11/13

9:25 pm-2:26 pm

2 stops34h 01m

$1,577

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 5/29

7:23 pm-6:55 am

1 stop20h 32m

Sydney Kingsford Smith

Fri 6/5

10:20 am-6:17 pm

1 stop22h 57m

$1,588

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 9/9

3:02 pm-10:40 am

2 stops28h 38m

Sydney Kingsford Smith

Fri 9/18

11:55 am-11:50 pm

3 stops26h 55m

$1,792

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 10/13

1:27 pm-8:45 am

3 stops27h 18m

Sydney Kingsford Smith

Fri 11/13

9:55 am-10:06 pm

3 stops29h 11m

$1,796

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 6/2

1:38 pm-10:40 am

3 stops30h 02m

Sydney Kingsford Smith

Fri 7/17

9:55 am-11:57 pm

3 stops29h 02m

$1,797

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/4

7:45 am-8:45 am

3 stops34h 00m

Sydney Kingsford Smith

Mon 5/18

11:55 am-10:30 pm

2 stops25h 35m

$2,049

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/7

9:16 am-8:45 am

3 stops32h 29m

Sydney Kingsford Smith

Mon 9/14

11:55 am-11:50 pm

3 stops26h 55m

$2,096

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

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, May is the cheapest month in which you can book a flight from St. Louis to New South Wales (average of $310). Flying from St. Louis to New South Wales in June is currently the most expensive (average of $1,250). 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 April 17, 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

Comfort

8.1

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 19
8.0
Excellent

Paul,Mar 2026

YVR - NAN

Flown with Fiji Airways before they have always been good. The crew are very friendly and attentive. The seats in economy are in the small side but good. Another happy flight with them.

Entertainment

7.5

Food

7.5

Comfort

8.1

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 19
8.0
Excellent

Paul,Mar 2026

YVR - NAN

Flown with Fiji Airways before they have always been good. The crew are very friendly and attentive. The seats in economy are in the small side but good. Another happy flight with them.

Entertainment

7.5

Food

7.5

Comfort

8.1

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 19
8.0
Excellent

Paul,Mar 2026

YVR - NAN

Flown with Fiji Airways before they have always been good. The crew are very friendly and attentive. The seats in economy are in the small side but good. Another happy flight with them.

Entertainment

7.5

Food

7.5

Comfort

8.1

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 19
8.0
Excellent

Paul,Mar 2026

YVR - NAN

Flown with Fiji Airways before they have always been good. The crew are very friendly and attentive. The seats in economy are in the small side but good. Another happy flight with them.

Entertainment

7.5

Food

7.5

Comfort

8.1

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 19
8.0
Excellent

Paul,Mar 2026

YVR - NAN

Flown with Fiji Airways before they have always been good. The crew are very friendly and attentive. The seats in economy are in the small side but good. Another happy flight with them.

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 20h 32m. St. Louis and New South Wales are separated by a distance of 9054 mi. This flight may include one or multiple stops.

  • 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, May is the cheapest month in which you can book a flight from St. Louis to New South Wales (average of $310). Flying from St. Louis to New South Wales in June is currently the most expensive (average of $1,250). 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 April 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$887Average$1,222FlexibilityNo cancel feeOn-time74%
Qantas AirwaysCheapest$1,094Average$1,305FlexibilityNo 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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