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$549+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jun 2 — Jun 91
Tue 6/2
Tue 6/9
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 May 3, 2026.

This oojo deal was found by Cheapflights users on 5/2. 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.
Fri 11/206:13 pm
STL
-
SYD
2 stops33h 37m
Qantas Airways
Sun 11/2911:15 am
SYD
-
STL
1 stop29h 27m
Qantas Airways
Deal found 5/2$1,162
This American Airlines deal was found by Cheapflights users on 4/29. 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 7/2912:16 pm
MCI
-
BNE
2 stops25h 44m
American Airlines
Wed 8/128:35 pm
BNE
-
MCI
2 stops27h 24m
American Airlines
Deal found 4/29$1,176
This oojo deal was found by Cheapflights users on 4/29. 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 10/95:26 pm
MCI
-
BNE
2 stops47h 54m
Qantas Airways
Wed 10/289:45 am
BNE
-
MCI
1 stop21h 56m
Qantas Airways
Deal found 4/29$1,198
This oojo deal was found by Cheapflights users on 4/28. 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.
Sun 12/272:00 pm
MCI
-
SYD
2 stops27h 55m
Qantas Airways
Sat 1/92:05 pm
SYD
-
MCI
1 stop19h 42m
Qantas Airways
Deal found 4/28$1,209
This oojo deal was found by Cheapflights users on 4/28. 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 8/225:14 pm
MCI
-
BNE
2 stops25h 06m
Qantas Airways
Wed 9/27:30 am
BNE
-
MCI
2 stops26h 09m
Qantas Airways
Deal found 4/28$1,211
This oojo deal was found by Cheapflights users on 4/28. 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 10/245:26 pm
MCI
-
SYD
1 stop21h 29m
Qantas Airways
Sat 10/317:00 am
SYD
-
MCI
2 stops22h 50m
Qantas Airways
Deal found 4/28$1,211
This oojo deal was found by Cheapflights users on 5/1. 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.
Sat 10/315:26 pm
MCI
-
SYD
1 stop21h 29m
Qantas Airways
Wed 12/26:25 am
SYD
-
MCI
2 stops23h 20m
Qantas Airways
Deal found 5/1$1,212
This oojo deal was found by Cheapflights users on 4/30. 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.
Sun 11/15:35 pm
MCI
-
SYD
1 stop20h 20m
Qantas Airways
Mon 11/95:30 pm
SYD
-
MCI
2 stops36h 20m
Qantas Airways
Deal found 4/30$1,214
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 12/15:05 pm
MCI
-
BNE
2 stops22h 30m
United Airlines
Tue 12/87:55 am
BNE
-
MCI
3 stops31h 42m
United Airlines
Deal found 4/28$1,229
This United Airlines deal was found by Cheapflights users on 4/29. 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 5/41:50 pm
MCI
-
SYD
2 stops26h 05m
United Airlines
Sun 5/179:30 am
SYD
-
MCI
2 stops21h 45m
United Airlines
Deal found 4/29$1,234
This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:17 pm
MCI
-
BNE
2 stops31h 23m
Qantas Airways
Tue 10/279:45 am
BNE
-
MCI
1 stop19h 05m
Qantas Airways
Deal found 4/29$1,237
This Trip.com deal was found by Cheapflights users on 4/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:35 pm
MCI
-
BNE
1 stop20h 55m
Qantas Airways
Tue 12/89:15 am
BNE
-
MCI
1 stop20h 34m
Qantas Airways
Deal found 4/28$1,245

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 May 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,176
(American Airlines)

One-way from

$549
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,434
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 ($84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 3, 2026.
Use the filters below to find and compare flights from Missouri to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 6/7

1:50 pm-7:00 am

2 stops26h 10m

Sydney Kingsford Smith

Sun 6/14

9:30 am-3:45 pm

1 stop21h 15m

$1,250

Kansas CityMelbourne

MCI - MEL

MCIMEL

Kansas City

Fri 5/29

7:59 pm-8:15 am

1 stop21h 16m

Melbourne

Fri 6/5

10:55 am-10:15 pm

1 stop26h 20m

$1,278

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 8/5

7:59 pm-6:55 am

1 stop19h 56m

Sydney Kingsford Smith

Sat 8/15

10:20 am-11:25 pm

2 stops28h 05m

$1,293

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 5/14

4:09 pm-6:50 am

1 stop23h 41m

Sydney Kingsford Smith

Wed 5/27

9:15 am-3:01 pm

1 stop20h 46m

$1,294

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 6/14

7:24 pm-6:55 am

1 stop20h 31m

Sydney Kingsford Smith

Sun 6/21

12:00 pm-4:33 pm

1 stop19h 33m

$1,301

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 6/1

4:48 pm-7:00 am

2 stops23h 12m

Sydney Kingsford Smith

Wed 6/10

10:20 am-6:17 pm

1 stop22h 57m

$1,304

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 5/26

7:23 pm-6:55 am

1 stop20h 32m

Sydney Kingsford Smith

Wed 6/10

9:30 am-11:57 pm

2 stops29h 27m

$1,308

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 6/14

1:38 pm-7:00 am

2 stops26h 22m

Sydney Kingsford Smith

Sun 6/21

10:20 am-12:11 pm

2 stops40h 51m

$1,325

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 8/6

7:59 pm-6:55 am

1 stop19h 56m

Sydney Kingsford Smith

Thu 8/20

10:20 am-11:25 pm

2 stops28h 05m

$1,340

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sat 5/23

11:25 am-7:00 am

2 stops28h 35m

Sydney Kingsford Smith

Sat 5/30

10:20 am-7:47 pm

2 stops24h 27m

$1,344

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $310). Flying from Missouri to Australia in June is currently the most expensive (average of $1,144). 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, United Airlines, and Air Canada fly from Missouri to Australia in about 19h 56m. The time it takes to get you to your destination can typically vary by up to 3h 44m. Missouri and Australia are separated by a distance of 8839 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 $310). Flying from Missouri to Australia in June is currently the most expensive (average of $1,144). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 May 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$551Average$1,371FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$707Average$1,431FlexibilityNo cancel feeOn-time74%
Fiji AirwaysCheapest$887Average$1,264FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$894Average$1,001FlexibilityNo cancel feeOn-time67%
DeltaCheapest$917Average$1,392FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$962Average$1,378FlexibilityNo cancel feeOn-time71%

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