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$495+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$1,049
(American Airlines)

One-way from

$495
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,392
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. 5% potential increase in price ($91 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/112:27 pmSTL - BNE
2 stops25h 58mAmerican Airlines
Fri 8/88:05 pmBNE - STL
2 stops27h 15mAmerican Airlines
Deal found 7/2$1,049
This oojo deal was found by Cheapflights users on 7/3. 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 11/286:15 amSTL - SYD
2 stops34h 05mQantas Airways
Sun 12/142:20 pmSYD - STL
1 stop18h 47mQantas Airways
Deal found 7/3$1,128
This Air Canada deal was found by Cheapflights users on 7/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/141:30 pmSTL - SYD
2 stops26h 50mMultiple Airlines
Sat 9/279:20 amSYD - STL
2 stops22h 12mMultiple Airlines
Deal found 7/2$1,146
This Air Canada deal was found by Cheapflights users on 7/3. 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 8/219:15 amSTL - SYD
2 stops31h 05mAir Canada
Wed 9/39:20 amSYD - STL
2 stops44h 58mAir Canada
Deal found 7/3$1,150
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/15:27 pmSTL - SYD
1 stop22h 28mAmerican Airlines
Thu 8/149:10 amSYD - STL
2 stops22h 36mAmerican Airlines
Deal found 7/2$1,162
This United Airlines deal was found by Cheapflights users on 7/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/145:49 pmSTL - SYD
1 stop22h 06mUnited Airlines
Sat 9/2710:20 amSYD - STL
1 stop21h 25mUnited Airlines
Deal found 7/2$1,181
This Air Canada deal was found by Cheapflights users on 7/1. 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.
Mon 8/44:00 pmSTL - MEL
3 stops52h 05mAir Canada
Mon 8/118:30 pmMEL - STL
3 stops38h 15mAir Canada
Deal found 7/1$1,187
This oojo deal was found by Cheapflights users on 7/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/165:52 pmSTL - MEL
2 stops34h 28mMultiple Airlines
Sat 8/237:30 amMEL - STL
2 stops27h 52mMultiple Airlines
Deal found 7/2$1,198
This oojo deal was found by Cheapflights users on 7/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/165:52 pmSTL - BNE
2 stops25h 33mFiji Airways
Sat 8/2311:40 amBNE - STL
2 stops23h 42mFiji Airways
Deal found 7/2$1,266
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:57 pmSTL - MEL
1 stop42h 03mAmerican Airlines
Wed 1/1412:00 pmMEL - STL
1 stop28h 59mAmerican Airlines
Deal found 7/2$1,273
This oojo deal was found by Cheapflights users on 7/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:15 amSTL - MEL
2 stops35h 40mAir New Zealand
Wed 11/1912:10 pmMEL - STL
2 stops23h 37mAir New Zealand
Deal found 7/1$1,293
This Air Canada deal was found by Cheapflights users on 7/1. 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.
Thu 8/149:15 amSTL - CNS
3 stops39h 40mMultiple Airlines
Mon 8/185:35 pmCNS - STL
3 stops41h 10mMultiple Airlines
Deal found 7/1$1,294

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 July 3, 2025.
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. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 8/1

12:27 pm-5:25 am

2 stops25h 58m

Brisbane

Fri 8/8

8:05 pm-8:20 am

2 stops27h 15m

$1,049

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 11/28

6:15 am-9:20 am

2 stops34h 05m

Sydney Kingsford Smith

Sun 12/14

2:20 pm-4:07 pm

1 stop18h 47m

$1,128

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/14

1:30 pm-7:20 am

2 stops26h 50m

Sydney Kingsford Smith

Sat 9/27

9:20 am-4:32 pm

2 stops22h 12m

$1,146

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 8/21

9:15 am-7:20 am

2 stops31h 05m

Sydney Kingsford Smith

Wed 9/3

9:20 am-3:18 pm

2 stops44h 58m

$1,150

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 8/1

5:27 pm-6:55 am

1 stop22h 28m

Sydney Kingsford Smith

Thu 8/14

9:10 am-4:46 pm

2 stops22h 36m

$1,162

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/14

5:49 pm-6:55 am

1 stop22h 06m

Sydney Kingsford Smith

Sat 9/27

10:20 am-4:45 pm

1 stop21h 25m

$1,181

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 8/4

4:00 pm-11:05 am

3 stops52h 05m

Melbourne

Mon 8/11

8:30 pm-7:45 pm

3 stops38h 15m

$1,187

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sat 8/16

5:52 pm-7:20 pm

2 stops34h 28m

Melbourne

Sat 8/23

7:30 am-8:22 pm

2 stops27h 52m

$1,198

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 8/16

5:52 pm-10:25 am

2 stops25h 33m

Brisbane

Sat 8/23

11:40 am-8:22 pm

2 stops23h 42m

$1,266

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Wed 11/12

6:15 am-10:55 am

2 stops35h 40m

Melbourne

Wed 11/19

12:10 pm-6:47 pm

2 stops23h 37m

$1,293

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 48 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, February is the cheapest month in which you can book a flight from St. Louis to Australia (average of $1,040). Flying from St. Louis to Australia in December is currently the most expensive (average of $1,630). 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 AU?

Find hourly flight availability from St. Louis to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

When flying from St. Louis to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 3, 2025.
Read reviews from past customers who have flown ANA, Alaska Airlines, and Fiji Airways 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.
ANA
8.4
Very good
893 reviews

Boarding

8.5

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
ANA
8.4
Very good
893 reviews
ANA
8.4
Very good
893 reviews

Boarding

8.5

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Alaska Airlines
8.0
Very good
10,000 reviews
ANA
8.4
Very good
893 reviews

Boarding

8.5

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Fiji Airways
8.0
Very good
202 reviews
ANA
8.4
Very good
893 reviews

Boarding

8.5

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Delta
8.0
Very good
7,982 reviews
ANA
8.4
Very good
893 reviews

Boarding

8.5

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Air New Zealand
8.0
Very good
486 reviews
ANA
8.4
Very good
893 reviews

Boarding

8.5

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.

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.

  • What are the cheapest airlines to fly from St. Louis to Australia one-way?

    To fly one-way, consider booking your trip with Qantas Airways, which is currently one of the cheapest options available, starting at $615. Air Canada flights start at $617 while deals on United Airlines start at $739 one-way.

  • 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 - Sydney Kingsford Smith, Lambert-St Louis - Melbourne 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, February is the cheapest month in which you can book a flight from St. Louis to Australia (average of $1,040). Flying from St. Louis to Australia in December is currently the most expensive (average of $1,630). 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 7 airlines flying from St. Louis to Australia

Discover the top 7 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$687Average$1,850FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$912Average$1,281FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,010Average$1,641FlexibilityNo cancel feeOn-time69%
Fiji AirwaysCheapest$1,132Average$1,287FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,173Average$1,873FlexibilityNo cancel feeOn-time78%
American AirlinesCheapest$1,193Average$1,446FlexibilityNo cancel feeOn-time71%
Qatar AirwaysCheapest$1,449Average$1,715FlexibilityNo cancel feeOn-time68%

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