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$523+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
mar. 5 — mar. 121
jue. 3/5
jue. 3/12
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 febrero 3, 2026.

This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/71:02 pm
MCI
-
MEL
1 stop22h 58m
Qantas Airways
sáb. 2/214:05 pm
MEL
-
MCI
1 stop19h 45m
Qantas Airways
Deal found 2/2$877
This oojo deal was found by Cheapflights users on 2/2. 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.
mar. 2/35:04 pm
STL
-
SYD
2 stops28h 46m
Qantas Airways
mar. 2/105:45 pm
SYD
-
STL
1 stop23h 14m
Qantas Airways
Deal found 2/2$894
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/186:50 pm
STL
-
MEL
2 stops45h 30m
Qantas Airways
mié. 3/2512:00 pm
MEL
-
STL
1 stop27h 58m
Qantas Airways
Deal found 2/1$906
This oojo deal was found by Cheapflights users on 2/2. 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.
mar. 3/34:13 pm
STL
-
SYD
2 stops35h 37m
Qantas Airways
mar. 3/1011:20 am
SYD
-
STL
1 stop28h 38m
Qantas Airways
Deal found 2/2$906
This oojo deal was found by Cheapflights users on 1/31. 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.
mié. 2/45:04 pm
STL
-
SYD
2 stops34h 46m
Qantas Airways
mar. 2/105:45 pm
SYD
-
STL
1 stop23h 14m
Qantas Airways
Deal found 1/31$914
This oojo deal was found by Cheapflights users on 2/1. 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.
jue. 2/57:04 am
STL
-
SYD
1 stop32h 56m
Qantas Airways
sáb. 2/71:05 pm
SYD
-
STL
2 stops42h 42m
Qantas Airways
Deal found 2/1$915
This Qantas Airways deal was found by Cheapflights users on 2/2. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/44:13 pm
STL
-
MEL
2 stops47h 07m
Qantas Airways
mié. 3/1112:00 pm
MEL
-
STL
1 stop27h 58m
Qantas Airways
Deal found 2/2$934
This Air Canada deal was found by Cheapflights users on 2/2. 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.
sáb. 5/231:00 pm
STL
-
BNE
2 stops51h 05m
Air Canada
mar. 6/910:00 am
BNE
-
STL
2 stops25h 05m
Air Canada
Deal found 2/2$960
This American Airlines deal was found by Cheapflights users on 2/2. 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.
sáb. 2/71:02 pm
MCI
-
MEL
2 stops27h 28m
American Airlines
sáb. 2/2112:00 pm
MEL
-
MCI
2 stops23h 50m
American Airlines
Deal found 2/2$984
This Orbitz deal was found by Cheapflights users on 2/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/25:21 pm
MCI
-
BNE
2 stops47h 24m
Air Canada
lun. 3/910:45 am
BNE
-
MCI
2 stops27h 30m
Air Canada
Deal found 2/2$985
This Air Canada deal was found by Cheapflights users on 2/2. 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.
sáb. 5/231:00 pm
STL
-
BNE
2 stops51h 05m
Air Canada
vie. 6/510:00 am
BNE
-
STL
2 stops25h 05m
Air Canada
Deal found 2/2$1,003
This United Airlines deal was found by Cheapflights users on 2/2. 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.
jue. 3/195:30 pm
MCI
-
MEL
1 stop23h 30m
United Airlines
jue. 3/2612:00 pm
MEL
-
MCI
1 stop20h 23m
United Airlines
Deal found 2/2$1,003

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 febrero 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$906
(Kiwi.com)

One-way from

$523
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,511
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. 2% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 febrero 3, 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. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

mié. 3/18

6:50 pm-8:20 am

2 stops45h 30m

Melbourne

mié. 3/25

12:00 pm-11:58 pm

1 stop27h 58m

$906

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

mié. 3/4

4:13 pm-8:20 am

2 stops47h 07m

Melbourne

mié. 3/11

12:00 pm-11:58 pm

1 stop27h 58m

$934

Kansas CityBrisbane

MCI - BNE

MCIBNE

Kansas City

lun. 3/2

5:21 pm-8:45 am

2 stops47h 24m

Brisbane

lun. 3/9

10:45 am-11:15 pm

2 stops27h 30m

$985

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

jue. 3/19

5:30 pm-9:00 am

1 stop23h 30m

Melbourne

dom. 5/3

9:30 am-3:36 pm

1 stop21h 06m

$1,003

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

jue. 3/19

5:30 pm-9:00 am

1 stop23h 30m

Melbourne

jue. 3/26

12:00 pm-4:23 pm

1 stop20h 23m

$1,003

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

dom. 4/5

9:00 am-8:15 am

2 stops32h 15m

Melbourne

dom. 4/12

9:30 am-7:45 pm

2 stops25h 15m

$1,008

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

jue. 3/12

6:41 pm-7:00 am

2 stops44h 19m

Melbourne

dom. 3/22

9:10 am-12:46 am

2 stops31h 36m

$1,015

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

jue. 3/12

5:30 pm-9:00 am

1 stop23h 30m

Melbourne

dom. 3/22

10:30 am-12:54 pm

2 stops42h 24m

$1,021

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom. 5/24

1:00 pm-7:05 am

2 stops27h 05m

Brisbane

lun. 6/8

10:00 am-8:05 pm

2 stops25h 05m

$1,024

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

jue. 3/5

6:50 pm-8:50 pm

2 stops33h 00m

Sydney Kingsford Smith

jue. 3/12

11:20 am-11:58 pm

1 stop28h 38m

$1,056

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

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 $573). Flying from Missouri to Australia in July is currently the most expensive (average of $1,020). 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, Air Canada, and United Airlines fly from Missouri to Australia in about 23h 30m. The time it takes to get you to your destination can typically vary by up to 23h 54m. 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 $573). Flying from Missouri to Australia in July is currently the most expensive (average of $1,020). 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 febrero 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$551Average$1,386FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$608Average$1,177FlexibilityNo cancel feeOn-time67%
DeltaCheapest$848Average$1,487FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$973Average$1,425FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$975Average$1,510FlexibilityNo cancel feeOn-time74%
Fiji AirwaysCheapest$1,132Average$1,268FlexibilityNo cancel feeOn-time74%

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