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$656+ 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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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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 November 4, 2025.

This Delta deal was found by Cheapflights users on 11/4. 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.
Tue 11/185:27 pmMCI - BNE
2 stops46h 53mDelta
Fri 11/2810:40 amBNE - MCI
2 stops29h 44mDelta
Deal found 11/4$971
This Air Canada deal was found by Cheapflights users on 11/3. 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.
Sat 11/224:43 pmSTL - BNE
2 stops24h 02mMultiple Airlines
Fri 12/2610:45 amBNE - STL
2 stops44h 44mMultiple Airlines
Deal found 11/3$974
This Air Canada deal was found by Cheapflights users on 11/3. 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.
Sat 11/221:47 pmMCI - BNE
2 stops26h 58mMultiple Airlines
Fri 12/2610:45 amBNE - MCI
2 stops21h 22mMultiple Airlines
Deal found 11/3$977
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Mon 11/311:05 amSTL - BNE
2 stops28h 25mUnited Airlines
Mon 11/1011:40 amBNE - STL
1 stop20h 47mUnited Airlines
Deal found 11/2$1,037
This American Airlines deal was found by Cheapflights users on 11/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/147:00 amSTL - BNE
1 stop30h 00mAmerican Airlines
Mon 11/249:40 amBNE - STL
1 stop18h 57mAmerican Airlines
Deal found 11/3$1,072
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 11/183:04 pmMCI - BNE
1 stop23h 26mAmerican Airlines
Fri 11/287:40 pmBNE - MCI
2 stops29h 06mAmerican Airlines
Deal found 11/4$1,076
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/1412:31 pmSTL - BNE
2 stops26h 59mUnited Airlines
Mon 11/2411:40 amBNE - STL
2 stops20h 48mUnited Airlines
Deal found 11/4$1,092
This Air Canada deal was found by Cheapflights users on 11/4. 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.
Sat 11/224:43 pmSTL - BNE
2 stops24h 02mAir Canada
Fri 12/2610:45 amBNE - STL
2 stops44h 44mAir Canada
Deal found 11/4$1,103
This oojo deal was found by Cheapflights users on 11/3. 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.
Tue 11/117:00 amSTL - MEL
1 stop33h 30mQantas Airways
Wed 12/36:30 pmMEL - STL
2 stops35h 04mQantas Airways
Deal found 11/3$1,105
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/225:10 pmMCI - BNE
2 stops46h 20mUnited Airlines
Fri 12/2611:40 amBNE - MCI
1 stop19h 29mUnited Airlines
Deal found 11/4$1,106
This Booking.com deal was found by Cheapflights users on 11/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:43 pmSTL - BNE
2 stops48h 02mAir Canada
Mon 11/2411:05 amBNE - STL
3 stops68h 24mAir Canada
Deal found 11/4$1,128
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/225:29 pmSTL - BNE
1 stop22h 01mUnited Airlines
Fri 12/2611:40 amBNE - STL
1 stop26h 50mUnited Airlines
Deal found 11/4$1,137

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 November 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$974
(Air Canada)

One-way from

$656
(oojo)

Popular in

December

Cheapest in

August

Average price

$1,385
Provider with most accurate pricing for Lambert-St Louis-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Sydney Kingsford Smith flights.
Search Deals
From Missouri to Australia
Search Deals
One-way flight from Missouri to Australia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 4, 2025.
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

Kansas CityBrisbane

MCI - BNE

MCIBNE

Kansas City

Tue 11/18

5:27 pm-8:20 am

2 stops46h 53m

Brisbane

Fri 11/28

10:40 am-12:24 am

2 stops29h 44m

$971

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 11/22

4:43 pm-8:45 am

2 stops24h 02m

Brisbane

Fri 12/26

10:45 am-3:29 pm

2 stops44h 44m

$974

Kansas CityBrisbane

MCI - BNE

MCIBNE

Kansas City

Sat 11/22

1:47 pm-8:45 am

2 stops26h 58m

Brisbane

Fri 12/26

10:45 am-4:07 pm

2 stops21h 22m

$977

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 2/8

1:45 pm-9:35 am

2 stops26h 50m

Sydney Kingsford Smith

Sat 2/28

11:20 am-12:40 am

3 stops30h 20m

$995

Kansas CityBrisbane

MCI - BNE

MCIBNE

Kansas City

Sun 2/1

5:45 am-8:45 am

2 stops35h 00m

Brisbane

Sat 2/7

10:45 am-4:08 pm

2 stops21h 23m

$1,002

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 1/25

8:45 am-8:45 am

2 stops32h 00m

Brisbane

Sun 3/8

10:45 am-2:29 pm

2 stops43h 44m

$1,006

Kansas CityBrisbane

MCI - BNE

MCIBNE

Kansas City

Sun 2/1

5:10 pm-8:45 am

2 stops23h 35m

Brisbane

Sat 2/7

10:45 am-4:08 pm

2 stops21h 23m

$1,010

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 2/1

5:45 am-9:35 am

2 stops34h 50m

Sydney Kingsford Smith

Sun 2/8

11:20 am-4:08 pm

2 stops21h 48m

$1,055

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 11/14

7:00 am-5:00 am

1 stop30h 00m

Brisbane

Mon 11/24

9:40 am-7:30 pm

1 stop25h 50m

$1,072

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 11/14

3:14 pm-7:30 am

2 stops24h 16m

Brisbane

Mon 11/24

11:40 am-9:54 pm

2 stops26h 14m

$1,092

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 57 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, May is the cheapest month in which you can book a flight from Missouri to Australia (average of $568). Flying from Missouri to Australia in July is currently the most expensive (average of $1,242). 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 MO to AU?

Find hourly flight availability from Missouri 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 November 4, 2025.

When flying from Missouri to Australia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 13% versus a flight in the evening.

What is the cheapest day to fly from Missouri to Australia?

Use this chart to determine the cheapest time to fly round-trip from Missouri to Australia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Missouri to Australia flight should consider departing on Wednesday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 Delta, Air Canada, and American Airlines fly from Missouri to Australia in about 30h. The time it takes to get you to your destination can typically vary by up to 16h 53m. Missouri and Australia are separated by a distance of 8745 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Missouri to Australia one-way?

    The cheapest airlines for a one-way flight from Missouri to Australia are Fiji Airways ($656), American Airlines ($683), and Delta ($701).

  • 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, May is the cheapest month in which you can book a flight from Missouri to Australia (average of $568). Flying from Missouri to Australia in July is currently the most expensive (average of $1,242). 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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Top 7 airlines flying from Missouri to Australia

Discover the top 7 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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,391FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$897Average$1,202FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$975Average$1,466FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,044Average$1,448FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$1,132Average$1,296FlexibilityNo cancel feeOn-time74%
DeltaCheapest$1,211Average$1,436FlexibilityNo cancel feeOn-timeN/A
Air New ZealandCheapest$1,259Average$1,437FlexibilityNo cancel feeOn-time78%

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