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$481+ Cheap flights from Missouri 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheap flight deals from Missouri to Australia

Keep the following information in mind while searching for Missouri to Australia flight deals. Data was last updated January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$940
(oojo)

One-way from

$481
(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 Missouri to Australia
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One-way flight from Missouri to Australia
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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 Missouri to Australia

Cheapest flights from Missouri to Australia
Explore the most affordable flight options available from Missouri to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 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 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 1/13. 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.
Wed 2/111:56 pm
MCI
-
MEL
1 stop22h 04m
Qantas Airways
Wed 2/184:05 pm
MEL
-
MCI
1 stop19h 44m
Qantas Airways
Deal found 1/13$965
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 oojo deal was found by Cheapflights users on 1/14. 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 2/115:04 pm
STL
-
SYD
2 stops31h 36m
Qantas Airways
Wed 2/185:45 pm
SYD
-
STL
1 stop23h 14m
Qantas Airways
Deal found 1/14$979
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/111:56 pm
MCI
-
MEL
1 stop22h 04m
American Airlines
Wed 2/184:05 pm
MEL
-
MCI
2 stops24h 38m
American Airlines
Deal found 1/13$980
This oojo deal was found by Cheapflights users on 1/14. 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 2/25:04 pm
STL
-
SYD
2 stops31h 36m
Qantas Airways
Mon 2/1611:20 am
SYD
-
STL
1 stop29h 39m
Qantas Airways
Deal found 1/14$981
This Air Canada deal was found by Cheapflights users on 1/14. 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 5/251:00 pm
STL
-
BNE
2 stops27h 05m
Air Canada
Fri 6/510:00 am
BNE
-
STL
2 stops25h 05m
Air Canada
Deal found 1/14$997
This United Airlines deal was found by Cheapflights users on 1/14. 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.
Sat 2/217:18 pm
MCI
-
MEL
1 stop21h 42m
United Airlines
Sat 2/2811:30 am
MEL
-
MCI
2 stops27h 29m
United Airlines
Deal found 1/14$998
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/279:12 am
MCI
-
MEL
2 stops31h 48m
United Airlines
Fri 3/611:30 am
MEL
-
MCI
2 stops21h 49m
United Airlines
Deal found 1/13$1,002
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

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri 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 15, 2026.
Use the filters below to find and compare flights from Missouri to Australia that are best for you.

Fly from

Missouri

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. 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

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

Wed 2/11

1:56 pm-5:00 am

1 stop22h 04m

Melbourne

Wed 2/18

4:05 pm-6:49 pm

1 stop19h 44m

$965

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

Wed 2/11

1:56 pm-9:30 am

2 stops26h 34m

Melbourne

Wed 2/18

12:00 pm-5:17 pm

2 stops22h 17m

$980

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 2/2

5:04 pm-5:40 pm

2 stops31h 36m

Sydney Kingsford Smith

Mon 2/16

11:20 am-11:59 pm

1 stop29h 39m

$981

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 2/28

6:38 am-9:10 am

2 stops57h 32m

Sydney Kingsford Smith

Sat 3/7

5:45 pm-11:59 pm

1 stop23h 14m

$989

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

Fri 2/27

7:18 pm-10:00 am

1 stop21h 42m

Melbourne

Fri 3/6

1:00 pm-11:15 pm

2 stops27h 15m

$998

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

Sat 2/21

7:18 pm-10:00 am

1 stop21h 42m

Melbourne

Sat 2/28

11:30 am-9:59 pm

2 stops27h 29m

$998

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

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

Thu 3/12

8:11 pm-7:00 am

2 stops42h 49m

Melbourne

Sun 3/22

9:10 am-12:46 am

2 stops31h 36m

$1,009

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 60 results
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Best time to book a flight from Missouri to Australia

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

What is the cheapest month to book a flight from Missouri to Australia?

Currently, December is the cheapest month in which you can book a flight from Missouri to Australia (average of $565). Flying from Missouri to Australia in July is currently the most expensive (average of $1,238). 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.

Related info for your journey

Find useful and relevant information for your journey from Missouri to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Missouri to Australia?

    Airlines like Qantas Airways, American Airlines, and Air Canada fly from Missouri to Australia in about 26h 34m. The time it takes to get you to your destination can typically vary by up to 22h 06m. Missouri and Australia are separated by a distance of 9267 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Missouri to Australia that include hotel bookings?

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

  • How can I find direct flights from Missouri to Australia?

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

  • Can I find deals for business class flights from Missouri to Australia?

    Yes. Cheapflights offers flight deals from Missouri 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 Missouri to Australia?

    Currently, December is the cheapest month in which you can book a flight from Missouri to Australia (average of $565). Flying from Missouri to Australia in July is currently the most expensive (average of $1,238). 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 Missouri to Australia

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Top 6 airlines flying from Missouri to Australia

Discover the top 6 airlines that operate flights from Missouri 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 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$551Average$1,397FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$608Average$1,182FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$973Average$1,425FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$975Average$1,455FlexibilityNo cancel feeOn-time74%
Fiji AirwaysCheapest$1,132Average$1,296FlexibilityNo cancel feeOn-time74%
DeltaCheapest$1,160Average$1,466FlexibilityNo cancel feeOn-timeN/A

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