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$461+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
jan 4 — jan 111
dom 1/4
dom 1/11
1 adult, Economy
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Cheap 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 dezembro 5, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 12/41:40 pmMCI - MEL
2 stops27h 20mUnited Airlines
qui 12/111:00 pmMEL - MCI
1 stop20h 46mUnited Airlines
Deal found 12/3$995
This United Airlines deal was found by Cheapflights users on 12/4. 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.
sex 12/511:36 amMCI - BNE
2 stops27h 54mUnited Airlines
ter 12/911:40 amBNE - MCI
1 stop21h 06mUnited Airlines
Deal found 12/4$1,037
This United Airlines deal was found by Cheapflights users on 12/4. 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.
seg 12/83:19 pmSTL - BNE
2 stops24h 11mUnited Airlines
sex 12/1211:40 amBNE - STL
1 stop20h 47mUnited Airlines
Deal found 12/4$1,037
This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 12/711:36 amMCI - BNE
2 stops27h 54mUnited Airlines
ter 12/911:40 amBNE - MCI
1 stop21h 06mUnited Airlines
Deal found 12/3$1,189
This Expedia deal was found by Cheapflights users on 12/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 12/54:37 pmSTL - SYD
2 stops45h 18mAir Canada
sex 12/1211:20 amSYD - STL
2 stops22h 08mAir Canada
Deal found 12/4$1,233
This oojo deal was found by Cheapflights users on 12/3. 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.
sex 12/55:30 pmSTL - MEL
2 stops36h 40mQantas Airways
seg 12/84:05 pmMEL - STL
1 stop20h 24mQantas Airways
Deal found 12/3$1,239
This American Airlines deal was found by Cheapflights users on 12/3. 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.
sex 12/56:55 amSTL - MEL
1 stop29h 20mAmerican Airlines
sex 12/1212:00 pmMEL - STL
1 stop28h 57mAmerican Airlines
Deal found 12/3$1,261
This Qantas Airways deal was found by Cheapflights users on 12/4. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/81:20 pmSTL - MEL
2 stops39h 30mQantas Airways
sex 12/124:05 pmMEL - STL
1 stop20h 24mQantas Airways
Deal found 12/4$1,270
This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 12/318:05 amSTL - MEL
2 stops32h 25mUnited Airlines
qua 1/141:00 pmMEL - STL
2 stops25h 13mUnited Airlines
Deal found 12/3$1,278
This oojo deal was found by Cheapflights users on 12/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 12/111:20 pmSTL - MEL
1 stop22h 40mQantas Airways
qui 12/2512:15 pmMEL - STL
2 stops45h 55mQantas Airways
Deal found 12/4$1,303
This Qantas Airways deal was found by Cheapflights users on 12/3. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 12/313:30 pmSTL - MEL
2 stops26h 55mMultiple Airlines
qua 1/144:05 pmMEL - STL
1 stop23h 50mMultiple Airlines
Deal found 12/3$1,314
This United Airlines deal was found by Cheapflights users on 12/4. 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.
qui 12/111:35 pmSTL - MEL
2 stops26h 55mUnited Airlines
qui 12/251:00 pmMEL - STL
2 stops26h 22mUnited Airlines
Deal found 12/4$1,375

Find flight deals from Missouri to Australia

Keep the following information in mind while searching for Missouri to Australia flight deals. Data was last updated dezembro 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$929
(American Airlines)

One-way from

$461
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,766
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. 5% potential increase in price ($88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 dezembro 5, 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

dom 2/1

11:55 am-5:00 am

2 stops25h 05m

Brisbane

sáb 2/7

7:40 pm-11:05 am

2 stops31h 25m

$929

Kansas CityBrisbane

MCI - BNE

MCIBNE

Kansas City

sex 2/20

10:58 am-5:00 am

2 stops26h 02m

Brisbane

qui 3/5

7:40 pm-12:07 am

2 stops20h 27m

$929

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

dom 3/1

7:18 pm-10:00 am

1 stop21h 42m

Melbourne

sex 3/13

10:30 am-9:59 pm

2 stops27h 29m

$995

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

qui 3/12

1:58 pm-9:30 am

2 stops27h 32m

Melbourne

dom 3/22

7:00 am-7:03 pm

2 stops28h 03m

$1,005

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

qui 3/12

6:41 pm-7:00 am

2 stops44h 19m

Melbourne

dom 3/22

9:10 am-12:41 am

2 stops31h 31m

$1,006

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

qua 1/28

7:00 am-7:25 am

2 stops31h 25m

Sydney Kingsford Smith

sáb 1/31

2:00 pm-11:33 pm

3 stops26h 33m

$1,018

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

qua 1/28

5:00 pm-7:30 am

1 stop22h 30m

Brisbane

ter 2/10

11:40 am-8:58 pm

2 stops25h 18m

$1,028

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

seg 1/26

9:59 am-8:20 am

2 stops30h 21m

Brisbane

dom 2/15

10:40 am-7:22 pm

2 stops24h 42m

$1,028

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom 1/25

5:00 pm-7:30 am

1 stop22h 30m

Brisbane

sáb 2/14

11:40 am-7:19 pm

2 stops23h 39m

$1,028

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom 1/25

6:57 pm-8:20 am

2 stops45h 23m

Brisbane

sex 2/13

10:40 am-5:42 pm

2 stops23h 02m

$1,028

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

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 $1,239). 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 dezembro 5, 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 at noon, which can drop the price by up to 18% 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 American Airlines, United Airlines, and Delta fly from Missouri to Australia in about 21h 42m. The time it takes to get you to your destination can typically vary by up to 22h 37m. 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, 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 $1,239). 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 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 dezembro 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,421FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$897Average$1,226FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$975Average$1,459FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,044Average$1,449FlexibilityNo cancel feeOn-time71%
Fiji AirwaysCheapest$1,132Average$1,296FlexibilityNo cancel feeOn-time74%
DeltaCheapest$1,160Average$1,446FlexibilityNo cancel feeOn-timeN/A

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