$578+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Oct 17 — Oct 241
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to New South Wales with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 September 17, 2025.
Round-trip from | $1,104 (oojo) |
|---|---|
One-way from | $578 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $1,474 |
Find flight deals from St. Louis to New South Wales
Cheapest flights from St. Louis to New South WalesExplore 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 September 17, 2025.
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 September 17, 2025.
This oojo deal was found by Cheapflights users on 9/15. 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.
Wed 11/57:00 amSTL - SYD
2 stops33h 20mQantas Airways
Sun 11/232:05 pmSYD - STL
1 stop22h 25mQantas Airways
Deal found 9/15![Qantas Airways logo]()
$1,104
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:55 amSTL - SYD
2 stops33h 25mQantas Airways
Wed 12/102:05 pmSYD - STL
1 stop19h 29mQantas Airways
Deal found 9/15![Qantas Airways logo]()
$1,127
This oojo deal was found by Cheapflights users on 9/15. 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.
Fri 11/285:50 pmSTL - SYD
2 stops35h 05mQantas Airways
Sun 12/142:05 pmSYD - STL
1 stop22h 22mQantas Airways
Deal found 9/15![Qantas Airways logo]()
$1,134
This Justfly.com deal was found by Cheapflights users on 9/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/296:39 amSTL - SYD
1 stop34h 21mQantas Airways
Sat 11/157:15 pmSYD - STL
2 stops34h 24mQantas Airways
Deal found 9/17![Qantas Airways logo]()
$1,174
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:14 pmSTL - SYD
2 stops35h 31mAlaska Airlines
Thu 11/69:40 pmSYD - STL
2 stops34h 38mAlaska Airlines
Deal found 9/15![Alaska Airlines logo]()
$1,176
This Gotogate deal was found by Cheapflights users on 9/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/301:35 pmSTL - SYD
2 stops27h 00mAir Canada
Thu 11/611:20 amSYD - STL
2 stops45h 09mAir Canada
Deal found 9/15![Air Canada logo]()
$1,199
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/163:57 pmSTL - SYD
2 stops35h 48mAlaska Airlines
Thu 10/239:40 pmSYD - STL
2 stops33h 21mAlaska Airlines
Deal found 9/16![Alaska Airlines logo]()
$1,248
This Fiji Airways deal was found by Cheapflights users on 9/17. 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 Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/296:39 amSTL - SYD
2 stops38h 06mMultiple Airlines
Thu 11/132:00 pmSYD - STL
2 stops25h 29mMultiple Airlines
Deal found 9/17![Multiple Airlines logo]()
$1,269
This Gotogate deal was found by Cheapflights users on 9/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:05 pmSTL - SYD
2 stops48h 30mAir Canada
Fri 11/711:20 amSYD - STL
2 stops45h 09mAir Canada
Deal found 9/16![Air Canada logo]()
$1,279
This Air Canada deal was found by Cheapflights users on 9/15. 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 10/294:05 pmSTL - SYD
2 stops48h 30mAir Canada
Sat 11/1511:20 amSYD - STL
2 stops45h 09mAir Canada
Deal found 9/15![Air Canada logo]()
$1,291
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 September 17, 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
Wed 10/29
6:39 am-9:00 am
1 stop34h 21m
Sydney Kingsford Smith
Sat 11/15
7:15 pm-5:08 pm
2 stops38h 53m
$1,175
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 10/16
3:57 pm-7:45 pm
2 stops35h 48m
Sydney Kingsford Smith
Thu 10/23
9:40 pm-3:01 pm
2 stops33h 21m
$1,248
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 10/29
6:39 am-12:45 pm
2 stops38h 06m
Sydney Kingsford Smith
Thu 11/13
2:00 pm-10:29 pm
2 stops25h 29m
$1,269
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 11/5
7:00 am-9:20 am
2 stops33h 20m
Sydney Kingsford Smith
Sun 11/23
7:20 am-12:37 pm
2 stops22h 17m
$1,310
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 11/30
7:05 am-8:30 am
2 stops32h 25m
Sydney Kingsford Smith
Thu 12/11
10:40 am-5:57 pm
2 stops24h 17m
$1,328
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 11/29
6:00 am-8:30 am
2 stops33h 30m
Sydney Kingsford Smith
Wed 12/17
10:40 am-4:22 pm
2 stops22h 42m
$1,328
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 11/28
5:50 pm-10:55 am
2 stops24h 05m
Sydney Kingsford Smith
Sun 12/14
2:05 pm-5:05 pm
1 stop20h 00m
$1,351
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 11/28
5:50 pm-10:25 pm
2 stops35h 35m
Sydney Kingsford Smith
Tue 12/16
9:10 am-11:57 pm
2 stops31h 47m
$1,352
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 11/29
6:13 pm-2:25 pm
2 stops27h 12m
Sydney Kingsford Smith
Tue 12/16
9:10 am-11:57 pm
2 stops31h 47m
$1,352
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 11/30
6:13 pm-10:55 am
2 stops23h 42m
Sydney Kingsford Smith
Tue 12/16
7:05 am-11:57 pm
2 stops33h 52m
$1,352
Showing 1-10 of 22 results
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 $1,032). Flying from St. Louis to New South Wales in December is currently the most expensive (average of $1,627). 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 September 17, 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.
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 September 17, 2025.
Read through reviews of airlines operating flights from St. Louis to New South Wales, such as Fiji Airways, Qantas Airways, and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.4
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.5
Food
7.5
Reviews
1 / 16
6.0
GoodChristopher,Jun 2025
LAX - NAN
Entertainment
7.4
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.5
Food
7.5
Reviews
1 / 16
6.0
GoodChristopher,Jun 2025
LAX - NAN
Entertainment
7.4
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.5
Food
7.5
Reviews
1 / 16
6.0
GoodChristopher,Jun 2025
LAX - NAN
Entertainment
7.4
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.5
Food
7.5
Reviews
1 / 16
6.0
GoodChristopher,Jun 2025
LAX - NAN
Entertainment
7.4
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.5
Food
7.5
Reviews
1 / 16
6.0
GoodChristopher,Jun 2025
LAX - NAN
Entertainment
7.4
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.5
Food
7.5
Reviews
1 / 16
6.0
GoodChristopher,Jun 2025
LAX - NAN
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.
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.
Alternative routes for St. Louis to New South Wales
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from St. Louis to New South Wales
Discover the top 6 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 September 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,222 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$897 | Average$1,281 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,173 | Average$1,873 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$1,262 | Average$1,569 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,340 | Average$1,469 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,341 | Average$1,510 | FlexibilityNo cancel fee | On-time69% |