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$616+ Cheap flights from Missouri to Sydney (SYD)

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Cheap flight deals from Missouri to Sydney

Cheapest flights from Missouri to Sydney
Explore the most affordable flight options available from Missouri to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.

This oojo deal was found by Cheapflights users on 7/26. 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 11/132:54 pm
STL
-
SYD
2 stops33h 46m
Qantas Airways
Thu 11/2611:20 am
SYD
-
STL
1 stop29h 25m
Qantas Airways
Deal found 7/26$1,079
This oojo deal was found by Cheapflights users on 7/23. 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 11/96:02 am
STL
-
SYD
1 stop33h 58m
Qantas Airways
Thu 11/195:50 pm
SYD
-
STL
2 stops41h 25m
Qantas Airways
Deal found 7/23$1,089
This Expedia deal was found by Cheapflights users on 7/22. 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.
Mon 8/105:24 pm
MCI
-
SYD
2 stops22h 56m
Air Canada
Tue 8/189:20 am
SYD
-
MCI
2 stops42h 17m
Air Canada
Deal found 7/22$1,106
This oojo deal was found by Cheapflights users on 7/25. 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 11/95:17 pm
MCI
-
SYD
1 stop20h 38m
Qantas Airways
Thu 11/197:15 pm
SYD
-
MCI
2 stops35h 58m
Qantas Airways
Deal found 7/25$1,107
This Air Canada deal was found by Cheapflights users on 7/25. 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.
Tue 9/812:10 pm
STL
-
SYD
2 stops28h 10m
Air Canada
Wed 9/309:20 am
SYD
-
STL
2 stops48h 21m
Air Canada
Deal found 7/25$1,111
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Sun 10/1112:10 pm
STL
-
SYD
2 stops28h 10m
Air Canada
Mon 10/1910:20 am
SYD
-
STL
2 stops48h 21m
Air Canada
Deal found 7/23$1,112
This FlightHub deal was found by Cheapflights users on 7/25. 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.
Mon 11/99:00 am
MCI
-
SYD
2 stops31h 35m
Air Canada
Wed 11/1811:20 am
SYD
-
MCI
3 stops42h 03m
Air Canada
Deal found 7/25$1,114
This Air Canada deal was found by Cheapflights users on 7/26. 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.
Tue 10/1312:10 pm
STL
-
SYD
2 stops28h 10m
Air Canada
Wed 11/1811:20 am
SYD
-
STL
2 stops45h 06m
Air Canada
Deal found 7/26$1,116
This Air Canada deal was found by Cheapflights users on 7/25. 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 9/712:10 pm
STL
-
SYD
3 stops52h 10m
Air Canada
Sun 9/279:20 am
SYD
-
STL
2 stops48h 21m
Air Canada
Deal found 7/25$1,119
This Air Canada deal was found by Cheapflights users on 7/22. 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.
Sun 8/308:55 am
STL
-
SYD
2 stops31h 25m
Air Canada
Mon 9/149:20 am
SYD
-
STL
2 stops43h 40m
Air Canada
Deal found 7/22$1,121
This Air Canada deal was found by Cheapflights users on 7/27. 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.
Wed 9/238:55 am
STL
-
SYD
2 stops31h 25m
Air Canada
Wed 10/710:20 am
SYD
-
STL
3 stops48h 21m
Air Canada
Deal found 7/27$1,124
This Air Canada deal was found by Cheapflights users on 7/22. 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 8/105:24 pm
MCI
-
SYD
2 stops22h 56m
Air Canada
Wed 8/269:20 am
SYD
-
MCI
2 stops40h 31m
Air Canada
Deal found 7/22$1,147

Find flight deals from Missouri to Sydney

Keep the following information in mind while searching for Missouri to Sydney flight deals. Data was last updated July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,106
(Expedia)

One-way from

$616
(oojo)

Popular in

December

Cheapest in

July

Average price

$1,161
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 Sydney Kingsford Smith
Search Deals
One-way flight from Missouri to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Sydney 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 July 27, 2026.
Use the filters below to find and compare flights from Missouri to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/7

12:10 pm-7:20 am

3 stops52h 10m

Sydney Kingsford Smith

Sun 9/27

9:20 am-6:41 pm

2 stops48h 21m

$1,119

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/7

6:53 pm-7:20 am

3 stops45h 27m

Sydney Kingsford Smith

Mon 9/14

9:20 am-10:00 pm

3 stops51h 40m

$1,169

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 8/10

1:32 pm-6:55 am

2 stops26h 23m

Sydney Kingsford Smith

Tue 8/18

10:20 am-2:33 pm

1 stop19h 13m

$1,170

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 8/5

6:01 am-6:55 am

2 stops33h 54m

Sydney Kingsford Smith

Wed 8/12

10:20 am-6:39 pm

1 stop23h 19m

$1,170

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/14

4:40 pm-6:55 am

2 stops23h 15m

Sydney Kingsford Smith

Sun 9/27

9:30 am-6:43 pm

2 stops24h 13m

$1,170

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 9/23

12:46 pm-7:05 am

2 stops27h 19m

Sydney Kingsford Smith

Wed 10/7

1:00 pm-11:42 pm

1 stop26h 42m

$1,171

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/7

3:32 pm-7:30 am

2 stops24h 58m

Sydney Kingsford Smith

Sun 9/27

9:10 am-7:45 pm

2 stops25h 35m

$1,171

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 9/7

3:32 pm-7:30 am

2 stops24h 58m

Sydney Kingsford Smith

Mon 9/14

9:10 am-11:30 pm

1 stop29h 20m

$1,171

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sat 11/7

2:58 pm-8:30 am

2 stops48h 32m

Sydney Kingsford Smith

Tue 11/17

10:40 am-2:49 pm

1 stop21h 09m

$1,189

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 9/13

4:20 pm-7:00 am

1 stop23h 40m

Sydney Kingsford Smith

Sat 10/3

9:30 am-3:39 pm

1 stop21h 09m

$1,220

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 32 resultsSorted by cheapest first
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Best time to book a flight from Missouri to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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 Sydney

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

Currently, March is the cheapest month in which you can book a flight from Missouri to Sydney (average of $1,241). Flying from Missouri to Sydney in December is currently the most expensive (average of $1,634). 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.

How much does it cost to fly round-trip from Missouri to Sydney?

Airfare is below average for this route at the moment.
Missouri to Sydney flights typically cost between $1,314 and $1,554 in September.
The cheapest round-trip price found within the last 5 days was $1,111 on Air Canada (Sep 8-Sep 30).

Related info for your journey

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

  • What airport do you fly into for flights to Sydney from Missouri?

    Sydney Kingsford Smith (SYD) is the airport you will fly into if you book a flight from Missouri to Sydney. It is only a 4.6 mi journey from Kingsford Smith (SYD) to Sydney’s city center.

  • How long is the flight from Missouri to Sydney?

    For as low as $1,170, Air Canada can have you in Sydney from Missouri in 26h 23m. The distance from Missouri to Sydney is about 8839 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Missouri to Sydney?

    The most popular route from Missouri to Sydney is Lambert-St Louis - Sydney Kingsford Smith. You may also consider Kansas City - Sydney Kingsford Smith or Columbia Regional - Sydney Kingsford Smith.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Missouri to Sydney (average of $1,241). Flying from Missouri to Sydney in December is currently the most expensive (average of $1,634). 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Coogee
Manly

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Missouri to Sydney

Discover the top 5 airlines that operate flights from Missouri to Sydney. 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 July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$917Average$1,386FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,000Average$1,095FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$1,057Average$1,399FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,077Average$1,475FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,144Average$1,450FlexibilityNo cancel feeOn-time69%

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