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New South Wales

$1,255+ Cheap flights from St. Louis (STL) to New South Wales

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheap 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 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,255
(StudentUniverse)

Popular in

December

Cheapest in

November

Average price

$1,504
Provider with most accurate pricing for Lambert-St Louis-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Sydney Kingsford Smith flights.
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From Lambert-St Louis to New South Wales
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Highest demand for flights based on searches. 8% potential increase in price ($133 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find 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 29, 2025.

This StudentUniverse deal was found by Cheapflights users on 4/28. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/97:47 pmSTL - SYD
1 stop20h 08mQantas Airways
Fri 6/209:10 amSYD - STL
1 stop28h 49mQantas Airways
Deal found 4/28$1,255
This Gurufare deal was found by Cheapflights users on 4/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/205:49 pmSTL - SYD
2 stops23h 56mAir New Zealand
Wed 9/39:55 amSYD - STL
2 stops27h 21mAir New Zealand
Deal found 4/28$1,261
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/57:30 amSTL - SYD
2 stops32h 50mAir Canada
Thu 6/129:20 amSYD - STL
2 stops42h 16mAir Canada
Deal found 4/28$1,346
This Air New Zealand deal was found by Cheapflights users on 4/28. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/204:40 pmSTL - SYD
3 stops26h 55mMultiple Airlines
Wed 9/39:55 amSYD - STL
2 stops27h 21mMultiple Airlines
Deal found 4/28$1,356
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/91:42 pmSTL - SYD
2 stops26h 13mUnited Airlines
Fri 6/2010:20 amSYD - STL
1 stop22h 40mUnited Airlines
Deal found 4/28$1,357
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/99:28 amSTL - SYD
2 stops30h 07mDelta
Mon 6/239:25 amSYD - STL
2 stops27h 09mDelta
Deal found 4/28$1,371
This American Airlines deal was found by Cheapflights users on 4/27. 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.
Wed 10/17:00 amSTL - SYD
1 stop33h 05mAmerican Airlines
Sat 10/1110:10 amSYD - STL
1 stop28h 43mAmerican Airlines
Deal found 4/27$1,504
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/293:08 pmSTL - SYD
2 stops61h 37mAlaska Airlines
Tue 5/69:40 pmSYD - STL
2 stops41h 19mAlaska Airlines
Deal found 4/28$1,594
This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/165:55 pmSTL - SYD
2 stops34h 55mFiji Airways
Sun 12/282:00 pmSYD - STL
2 stops26h 27mFiji Airways
Deal found 4/28$1,982
This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/12:19 pmSTL - SYD
2 stops35h 51mQatar Airways
Sat 5/38:45 pmSYD - STL
2 stops40h 29mQatar Airways
Deal found 4/28$2,194
This AranGrant deal was found by Cheapflights users on 4/28. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/287:47 pmSTL - SYD
2 stops43h 23mCathay Pacific
Sun 7/279:50 pmSYD - STL
2 stops36h 18mCathay Pacific
Deal found 4/28$3,933
This Flightnetwork deal was found by Cheapflights users on 4/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/98:10 amSTL - SYD
3 stops43h 50mTurkish Airlines
Fri 6/208:55 pmSYD - STL
3 stops40h 50mTurkish Airlines
Deal found 4/28$3,948

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 29, 2025.
Use the filters below to find and compare flights from St. Louis to New South Wales that are best for you.

Fly from

St. Louis

Fly to

New South Wales

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 6/9

7:47 pm-6:55 am

1 stop20h 08m

Sydney Kingsford Smith

Fri 6/20

9:10 am-10:59 pm

1 stop28h 49m

$1,255

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 8/20

5:49 pm-8:45 am

2 stops23h 56m

Sydney Kingsford Smith

Wed 9/3

9:55 am-10:16 pm

2 stops27h 21m

$1,261

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 6/5

7:30 am-7:20 am

2 stops32h 50m

Sydney Kingsford Smith

Thu 6/12

9:20 am-12:36 pm

2 stops42h 16m

$1,346

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 8/20

4:40 pm-8:45 am

3 stops25h 05m

Sydney Kingsford Smith

Wed 9/3

11:50 am-10:16 pm

2 stops25h 26m

$1,356

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 6/9

1:42 pm-6:55 am

2 stops26h 13m

Sydney Kingsford Smith

Fri 6/20

10:20 am-6:00 pm

1 stop22h 40m

$1,357

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 6/9

9:28 am-6:35 am

2 stops30h 07m

Sydney Kingsford Smith

Mon 6/23

9:25 am-9:34 pm

2 stops27h 09m

$1,371

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 10/1

7:00 am-7:05 am

1 stop33h 05m

Sydney Kingsford Smith

Sat 10/11

10:10 am-10:53 pm

1 stop28h 43m

$1,504

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 6/28

7:47 pm-6:10 am

2 stops43h 23m

Sydney Kingsford Smith

Sun 7/27

9:50 pm-7:08 pm

2 stops36h 18m

$3,933

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 6/9

8:10 am-7:00 pm

3 stops43h 50m

Sydney Kingsford Smith

Fri 6/20

8:55 pm-10:45 pm

3 stops40h 50m

$3,948

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 6/5

4:23 pm-5:20 am

3 stops45h 57m

Sydney Kingsford Smith

Thu 6/12

2:40 pm-7:17 pm

3 stops43h 37m

$4,072

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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, March is the cheapest month in which you can book a flight from St. Louis to New South Wales (average of $1,043). Flying from St. Louis to New South Wales in December is currently the most expensive (average of $1,643). 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.

What is the cheapest time of day to fly from STL to NSW?

Find hourly flight availability from St. Louis to New South Wales. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to New South Wales as you normally would.

Rainfall in New South Wales by month

Plan your trip to New South Wales by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in New South Wales ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit New South Wales when rainfall is around 2.0 in.

Temperature in New South Wales by month

Plan your trip to New South Wales by taking into account the average temperature totals by month.

If weather is an important factor for your trip to New South Wales, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

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 29, 2025.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air New Zealand
8.0
Very good
472 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Qantas Airways
7.5
Good
829 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Cathay Pacific
7.5
Good
852 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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, March is the cheapest month in which you can book a flight from St. Louis to New South Wales (average of $1,043). Flying from St. Louis to New South Wales in December is currently the most expensive (average of $1,643). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from St. Louis to New South Wales

Discover the top 5 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$962Average$1,339FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,173Average$1,875FlexibilityNo cancel feeOn-time78%
American AirlinesCheapest$1,193Average$1,444FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,204Average$1,476FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,281Average$1,681FlexibilityNo cancel feeOn-time74%

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