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New South Wales

$603+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 2 — May 91
Sat 5/2
Sat 5/9
1 adult, Economy
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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 2, 2026.

This Air Canada deal was found by Cheapflights users on 3/30. 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
2 stops48h 21m
Air Canada
Deal found 3/30$1,151
This Air Canada deal was found by Cheapflights users on 4/1. 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 10/138:55 am
STL
-
SYD
2 stops31h 25m
Air Canada
Fri 11/1311:20 am
SYD
-
STL
2 stops45h 10m
Air Canada
Deal found 4/1$1,160
This Air Canada deal was found by Cheapflights users on 3/30. 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.
Sat 11/74:15 pm
STL
-
SYD
2 stops48h 20m
Air Canada
Sat 11/1411:20 am
SYD
-
STL
2 stops45h 10m
Air Canada
Deal found 3/30$1,161
This Justfly.com deal was found by Cheapflights users on 3/31. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:30 pm
STL
-
SYD
2 stops23h 50m
Air Canada
Wed 11/1811:20 am
SYD
-
STL
2 stops45h 10m
Air Canada
Deal found 3/31$1,167
This FlightHub deal was found by Cheapflights users on 3/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:20 am
STL
-
SYD
2 stops35h 00m
Air Canada
Sun 10/1810:20 am
SYD
-
STL
2 stops29h 23m
Air Canada
Deal found 3/29$1,169
This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:10 am
STL
-
SYD
2 stops35h 10m
Air Canada
Mon 9/149:20 am
SYD
-
STL
2 stops29h 30m
Air Canada
Deal found 3/30$1,177
This lastminute.com deal was found by Cheapflights users on 3/28. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:11 pm
STL
-
SYD
2 stops26h 39m
Fiji Airways
Tue 5/191:15 pm
SYD
-
STL
2 stops24h 44m
Fiji Airways
Deal found 3/28$1,208
This Expedia deal was found by Cheapflights users on 4/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:05 am
STL
-
SYD
2 stops33h 15m
Air Canada
Wed 6/109:20 am
SYD
-
STL
2 stops41h 46m
Air Canada
Deal found 4/2$1,235
This Justfly.com deal was found by Cheapflights users on 3/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/64:48 pm
STL
-
SYD
2 stops23h 32m
Air Canada
Fri 7/179:20 am
SYD
-
STL
2 stops43h 42m
Air Canada
Deal found 3/29$1,242
This Justfly.com deal was found by Cheapflights users on 3/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/42:40 pm
STL
-
SYD
2 stops25h 40m
Air Canada
Fri 7/179:20 am
SYD
-
STL
2 stops43h 42m
Air Canada
Deal found 3/29$1,246

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 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,151
(Air Canada)

One-way from

$603
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,412
Provider with most accurate pricing for Lambert-St Louis-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Sydney Kingsford Smith flights.
Search Deals
From Lambert-St Louis to New South Wales
Search Deals
One-way flight from Lambert-St Louis to New South Wales
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 2, 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

7:06 pm-6:55 am

1 stop20h 49m

Sydney Kingsford Smith

Mon 5/18

10:20 am-6:22 pm

1 stop23h 02m

$1,485

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/11

7:06 pm-6:55 am

1 stop20h 49m

Sydney Kingsford Smith

Mon 5/18

10:20 am-6:22 pm

1 stop23h 02m

$1,486
Quickest round-trip

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 5/13

7:06 pm-6:55 am

1 stop20h 49m

Sydney Kingsford Smith

Wed 5/20

9:30 am-4:39 pm

2 stops22h 09m

$1,491

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 4/26

6:21 am-7:05 am

1 stop33h 44m

Sydney Kingsford Smith

Sun 5/3

12:00 pm-5:21 pm

1 stop20h 21m

$1,567

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 7/7

7:23 pm-6:55 am

1 stop20h 32m

Sydney Kingsford Smith

Tue 7/21

10:20 am-6:17 pm

1 stop22h 57m

$1,606

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 7/6

6:01 am-6:55 am

2 stops33h 54m

Sydney Kingsford Smith

Fri 7/17

10:20 am-6:17 pm

1 stop22h 57m

$1,606

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 4/23

6:21 am-7:05 am

1 stop33h 44m

Sydney Kingsford Smith

Sat 5/2

5:50 pm-11:57 pm

1 stop21h 07m

$1,668

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 5/29

1:38 pm-6:55 am

2 stops26h 17m

Sydney Kingsford Smith

Sat 6/20

9:30 am-10:07 am

2 stops39h 37m

$1,696

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/20

6:21 am-7:05 am

1 stop33h 44m

Sydney Kingsford Smith

Mon 4/27

5:50 pm-11:57 pm

1 stop21h 07m

$1,717

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 5/28

1:13 pm-8:45 am

3 stops28h 32m

Sydney Kingsford Smith

Sat 6/20

11:55 am-11:57 pm

3 stops27h 02m

$2,094

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 12 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 April 2, 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.
Fiji Airways
8.1
Very good
238 reviews

Boarding

8.2

Comfort

8.1

Crew

8.5

Entertainment

7.5

Food

7.5

Overall

8.1

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.
Fiji Airways
8.1
Very good
238 reviews
Fiji Airways
8.1
Very good
238 reviews

Boarding

8.2

Comfort

8.1

Crew

8.5

Entertainment

7.5

Food

7.5

Overall

8.1

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.
Qantas Airways
7.5
Good
1,016 reviews
Fiji Airways
8.1
Very good
238 reviews

Boarding

8.2

Comfort

8.1

Crew

8.5

Entertainment

7.5

Food

7.5

Overall

8.1

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.
United Airlines
7.4
Good
9,532 reviews
Fiji Airways
8.1
Very good
238 reviews

Boarding

8.2

Comfort

8.1

Crew

8.5

Entertainment

7.5

Food

7.5

Overall

8.1

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.
American Airlines
7.1
Good
11,548 reviews
Fiji Airways
8.1
Very good
238 reviews

Boarding

8.2

Comfort

8.1

Crew

8.5

Entertainment

7.5

Food

7.5

Overall

8.1

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 49m. 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 April 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$887Average$1,222FlexibilityNo cancel feeOn-time74%
Qantas AirwaysCheapest$1,094Average$1,294FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,144Average$1,512FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,233Average$1,497FlexibilityNo cancel feeOn-time71%

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