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$570+ Cheap flights from St. Louis (STL) to Australia

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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
1 adult, Economy
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Cheap flight deals from St. Louis to Australia

Keep the following information in mind while searching for St. Louis to Australia flight deals. Data was last updated January 14, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$940
(oojo)

One-way from

$570
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,460
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 Australia
Search Deals
One-way flight from Lambert-St Louis to Australia
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from St. Louis to Australia

Cheapest flights from St. Louis to Australia
Explore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 14, 2026.

This oojo deal was found by Cheapflights users on 1/13. 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.
Sat 2/146:38 am
STL
-
SYD
2 stops55h 57m
Qantas Airways
Sat 2/2111:20 am
SYD
-
STL
1 stop29h 39m
Qantas Airways
Deal found 1/13$940
This oojo deal was found by Cheapflights users on 1/13. 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 2/27:04 am
STL
-
SYD
1 stop32h 56m
Qantas Airways
Mon 2/165:50 pm
SYD
-
STL
2 stops38h 38m
Qantas Airways
Deal found 1/13$941
This Air Canada deal was found by Cheapflights users on 1/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:45 pm
STL
-
BNE
2 stops26h 00m
Multiple Airlines
Fri 3/610:45 am
BNE
-
STL
2 stops22h 14m
Multiple Airlines
Deal found 1/13$951
This oojo deal was found by Cheapflights users on 1/11. 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.
Thu 2/266:38 am
STL
-
BNE
2 stops42h 32m
Qantas Airways
Thu 3/57:40 pm
BNE
-
STL
1 stop20h 19m
Qantas Airways
Deal found 1/11$957
This Air Canada deal was found by Cheapflights users on 1/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/264:05 pm
STL
-
BNE
2 stops24h 40m
Air Canada
Thu 3/510:45 am
BNE
-
STL
2 stops44h 44m
Air Canada
Deal found 1/11$958
This Air Canada deal was found by Cheapflights users on 1/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/264:05 pm
STL
-
BNE
2 stops48h 40m
Multiple Airlines
Thu 3/56:10 am
BNE
-
STL
3 stops49h 19m
Multiple Airlines
Deal found 1/11$975
This Bravofly deal was found by Cheapflights users on 1/13. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:50 pm
STL
-
BNE
2 stops44h 40m
Qantas Airways
Fri 3/67:40 pm
BNE
-
STL
1 stop20h 19m
Qantas Airways
Deal found 1/13$976
This Kiwi.com deal was found by Cheapflights users on 1/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/37:04 am
STL
-
SYD
1 stop32h 56m
Qantas Airways
Tue 2/107:15 pm
SYD
-
STL
2 stops36h 28m
Qantas Airways
Deal found 1/12$991
This Priceline deal was found by Cheapflights users on 1/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:50 pm
STL
-
SYD
2 stops34h 00m
Qantas Airways
Mon 3/2311:20 am
SYD
-
STL
1 stop28h 38m
Qantas Airways
Deal found 1/12$1,007
This Air Canada deal was found by Cheapflights users on 1/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/64:05 pm
STL
-
BNE
2 stops48h 40m
Air Canada
Fri 2/1310:45 am
BNE
-
STL
2 stops44h 44m
Air Canada
Deal found 1/13$1,009
This FlightHub deal was found by Cheapflights users on 1/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/166:38 am
STL
-
MEL
1 stop33h 52m
Qantas Airways
Tue 2/246:30 pm
MEL
-
STL
2 stops46h 29m
Qantas Airways
Deal found 1/13$1,012
This KAYAK deal was found by Cheapflights users on 1/13. 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.
Sat 1/317:04 am
STL
-
SYD
1 stop32h 56m
Qantas Airways
Thu 2/52:35 pm
SYD
-
STL
2 stops42h 39m
Qantas Airways
Deal found 1/13$1,016

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Australia 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 January 14, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.

Fly from

St. Louis

Fly to

Australia

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 3/15

6:38 am-9:00 am

1 stop34h 22m

Sydney Kingsford Smith

Tue 3/24

5:50 pm-3:28 pm

2 stops37h 38m

$940

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 2/2

7:04 am-9:00 am

1 stop32h 56m

Sydney Kingsford Smith

Mon 2/16

5:50 pm-3:28 pm

2 stops38h 38m

$941

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 2/27

2:45 pm-8:45 am

2 stops26h 00m

Brisbane

Fri 3/6

10:45 am-4:59 pm

2 stops22h 14m

$951

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 2/26

6:38 am-5:10 pm

2 stops42h 32m

Brisbane

Thu 3/5

7:40 pm-11:59 pm

1 stop20h 19m

$957

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 2/26

4:05 pm-8:45 am

2 stops48h 40m

Brisbane

Thu 3/5

6:10 am-3:29 pm

3 stops49h 19m

$975

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 3/16

6:50 pm-8:50 pm

2 stops34h 00m

Sydney Kingsford Smith

Mon 3/23

11:20 am-11:58 pm

1 stop28h 38m

$1,007

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 2/16

6:38 am-9:30 am

1 stop33h 52m

Melbourne

Tue 2/24

6:30 pm-11:59 pm

2 stops46h 29m

$1,012

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 6/28

1:15 pm-7:05 am

2 stops50h 50m

Brisbane

Tue 7/7

10:00 am-6:27 pm

2 stops47h 27m

$1,055

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 6/27

1:15 pm-7:05 am

2 stops50h 50m

Brisbane

Tue 7/7

10:00 am-6:27 pm

2 stops47h 27m

$1,055

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 6/23

5:20 am-7:05 am

2 stops34h 45m

Brisbane

Sun 7/5

10:00 am-2:02 pm

2 stops43h 02m

$1,061

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

Showing 1-10 of 37 results
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Best time to book a flight from St. Louis to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia 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 Australia

What is the cheapest month to book a flight from St. Louis to Australia?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Australia (average of $671). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,257). 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.

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. 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 Australia. Reviews last updated January 14, 2026.
Read reviews from past customers who have flown Fiji Airways, Qantas Airways, and United Airlines from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Fiji Airways
8.0
Very good
216 reviews

Entertainment

7.5

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.5

Boarding

8.1

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Fiji Airways
8.0
Very good
216 reviews
Fiji Airways
8.0
Very good
216 reviews

Entertainment

7.5

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.5

Boarding

8.1

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Qantas Airways
7.5
Good
970 reviews
Fiji Airways
8.0
Very good
216 reviews

Entertainment

7.5

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.5

Boarding

8.1

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
United Airlines
7.4
Good
9,152 reviews
Fiji Airways
8.0
Very good
216 reviews

Entertainment

7.5

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.5

Boarding

8.1

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
American Airlines
7.2
Good
11,117 reviews
Fiji Airways
8.0
Very good
216 reviews

Entertainment

7.5

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.5

Boarding

8.1

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Air Canada
7.1
Good
10,619 reviews
Fiji Airways
8.0
Very good
216 reviews

Entertainment

7.5

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.5

Boarding

8.1

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Australia. 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 Australia?

    For a flight from St. Louis to Australia, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

  • How long is the flight from St. Louis to Australia?

    Departing from St. Louis to Australia will take you 25h 45m. Airlines will cover a distance of 9479 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from St. Louis to Australia?

    The most popular flight routes from St. Louis to Australia are Lambert-St Louis - Melbourne, Lambert-St Louis - Sydney Kingsford Smith and Lambert-St Louis - Melbourne Avalon.

  • Can I find deals for flights from St. Louis to Australia that include hotel bookings?

    Yes. In addition to deals on St. Louis to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Australia.

  • Can I find deals for business class flights from St. Louis to Australia?

    Yes. Cheapflights offers flight deals from St. Louis to Australia 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 Australia?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Australia (average of $671). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,257). 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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Alternative routes for St. Louis to Australia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from St. Louis to Australia

Discover the top 5 airlines that operate flights from St. Louis to Australia. 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 January 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$897Average$1,260FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$975Average$1,361FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,027Average$1,490FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,118Average$1,455FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$1,132Average$1,296FlexibilityNo cancel feeOn-time74%

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