New South Wales

$625+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jul 14 — Jul 211
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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 June 14, 2026.

This oojo deal was found by Cheapflights users on 6/12. 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.
Sun 11/156:13 pm
STL
-
SYD
2 stops33h 37m
Qantas Airways
Wed 11/2511:15 am
SYD
-
STL
1 stop29h 27m
Qantas Airways
Deal found 6/12$1,041
This oojo deal was found by Cheapflights users on 6/11. 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 11/167:00 am
STL
-
SYD
1 stop33h 00m
Qantas Airways
Sat 11/215:50 pm
SYD
-
STL
2 stops35h 47m
Qantas Airways
Deal found 6/11$1,042
This oojo deal was found by Cheapflights users on 6/9. 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 12/16:13 pm
STL
-
SYD
2 stops33h 37m
Qantas Airways
Tue 12/1511:15 am
SYD
-
STL
1 stop29h 42m
Qantas Airways
Deal found 6/9$1,176
This oojo deal was found by Cheapflights users on 6/9. 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 10/136:30 am
STL
-
SYD
2 stops41h 00m
Qantas Airways
Wed 11/186:45 pm
SYD
-
STL
2 stops45h 57m
Qantas Airways
Deal found 6/9$1,328
This oojo deal was found by Cheapflights users on 6/10. 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 10/136:30 am
STL
-
SYD
2 stops36h 15m
Qantas Airways
Fri 11/137:40 pm
SYD
-
STL
2 stops45h 02m
Qantas Airways
Deal found 6/10$1,329
This KAYAK deal was found by Cheapflights users on 6/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:36 pm
STL
-
SYD
2 stops26h 24m
Air New Zealand
Tue 8/2510:20 am
SYD
-
STL
2 stops21h 46m
Air New Zealand
Deal found 6/13$1,333
This oojo deal was found by Cheapflights users on 6/9. 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.
Sat 8/86:00 am
STL
-
SYD
2 stops39h 15m
Qantas Airways
Sat 8/156:25 am
SYD
-
STL
2 stops31h 34m
Qantas Airways
Deal found 6/9$1,353
This Delta deal was found by Cheapflights users on 6/10. 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 6/156:00 am
STL
-
SYD
2 stops33h 50m
Delta
Mon 6/229:15 am
SYD
-
STL
2 stops30h 28m
Delta
Deal found 6/10$1,355
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:00 am
STL
-
SYD
1 stop34h 05m
American Airlines
Tue 8/255:50 pm
SYD
-
STL
1 stop20h 09m
American Airlines
Deal found 6/13$1,356

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 June 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,041
(oojo)

One-way from

$625
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,560
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. 2% potential increase in price ($37 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($26 potential savings vs. average RT price).
Average for round-trip flights in June 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 June 14, 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

Sat 8/8

6:00 am-1:55 pm

2 stops40h 55m

Sydney Kingsford Smith

Sat 8/15

6:25 am-10:59 pm

2 stops31h 34m

$1,328

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 6/17

7:08 am-6:50 am

2 stops32h 42m

Sydney Kingsford Smith

Wed 6/24

9:15 am-8:42 am

2 stops38h 27m

$1,376
Quickest round-trip

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 7/2

4:48 pm-7:00 am

2 stops23h 12m

Sydney Kingsford Smith

Sun 7/12

10:20 am-6:17 pm

1 stop22h 57m

$1,380

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 8/16

12:10 pm-7:20 am

2 stops28h 10m

Sydney Kingsford Smith

Tue 8/25

9:20 am-6:42 pm

3 stops48h 22m

$1,411

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/7

8:42 am-6:55 am

1 stop31h 13m

Sydney Kingsford Smith

Mon 9/14

10:20 am-6:39 pm

1 stop23h 19m

$1,441

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 7/24

5:10 am-7:00 am

2 stops34h 50m

Sydney Kingsford Smith

Fri 7/31

10:20 am-6:17 pm

1 stop22h 57m

$1,451

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 8/8

6:00 am-7:05 am

1 stop34h 05m

Sydney Kingsford Smith

Sat 8/15

5:50 pm-10:59 pm

1 stop20h 09m

$1,457
Cheapest one-way

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 9/1

8:08 pm-7:30 am

2 stops44h 22m

$625
Quickest one-way

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 7/26

7:23 pm-6:55 am

1 stop20h 32m

$751

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 7/26

7:10 pm-8:40 am

3 stops46h 30m

$781

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 13 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 $1,280). 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 June 14, 2026.
Read through reviews of airlines operating flights from St. Louis to New South Wales, such as Qantas Airways,United Airlines, andAmerican Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.7

Entertainment

7.2

Crew

8.2

Food

7.0

Overall

7.5

Comfort

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

Boarding

7.7

Entertainment

7.2

Crew

8.2

Food

7.0

Overall

7.5

Comfort

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

Boarding

7.7

Entertainment

7.2

Crew

8.2

Food

7.0

Overall

7.5

Comfort

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

Boarding

7.7

Entertainment

7.2

Crew

8.2

Food

7.0

Overall

7.5

Comfort

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

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. 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 $1,280). 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

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Top 3 airlines flying from St. Louis to New South Wales

Discover the top 3 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 June 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,079Average$1,470FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,094Average$1,360FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,233Average$1,497FlexibilityNo cancel feeOn-time71%

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