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$523+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Mar 12 — Mar 191
Thu 3/12
Thu 3/19
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 February 10, 2026.

This oojo deal was found by Cheapflights users on 2/7. 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.
Wed 2/117:04 am
STL
-
SYD
1 stop32h 56m
Qantas Airways
Fri 2/207:05 am
SYD
-
STL
2 stops33h 54m
Qantas Airways
Deal found 2/7$892
This oojo deal was found by Cheapflights users on 2/7. 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.
Wed 2/117:04 am
STL
-
SYD
1 stop32h 56m
Qantas Airways
Wed 2/255:50 pm
SYD
-
STL
2 stops40h 23m
Qantas Airways
Deal found 2/7$911
This Ovago deal was found by Cheapflights users on 2/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:38 am
STL
-
SYD
1 stop33h 22m
Qantas Airways
Sun 2/157:15 pm
SYD
-
STL
2 stops45h 44m
Qantas Airways
Deal found 2/9$943
This oojo deal was found by Cheapflights users on 2/9. 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.
Wed 3/116:50 pm
STL
-
SYD
2 stops34h 00m
Qantas Airways
Wed 3/1811:20 am
SYD
-
STL
1 stop28h 38m
Qantas Airways
Deal found 2/9$1,047
This oojo deal was found by Cheapflights users on 2/9. 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 3/76:38 am
STL
-
SYD
1 stop33h 22m
Qantas Airways
Sat 3/145:50 pm
SYD
-
STL
2 stops39h 23m
Qantas Airways
Deal found 2/9$1,056
This oojo deal was found by Cheapflights users on 2/8. 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.
Thu 2/266:50 pm
STL
-
SYD
2 stops33h 00m
Qantas Airways
Thu 3/55:45 pm
SYD
-
STL
1 stop23h 14m
Qantas Airways
Deal found 2/8$1,060
This Air Canada deal was found by Cheapflights users on 2/9. 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 3/1110:05 am
STL
-
SYD
2 stops30h 30m
Multiple Airlines
Wed 3/1810:20 am
SYD
-
STL
2 stops45h 09m
Multiple Airlines
Deal found 2/9$1,157
This Qantas Airways deal was found by Cheapflights users on 2/9. 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.
Wed 2/111:56 pm
MCI
-
SYD
2 stops25h 04m
Multiple Airlines
Fri 3/131:00 pm
SYD
-
MCI
2 stops22h 03m
Multiple Airlines
Deal found 2/9$1,189
This Expedia deal was found by Cheapflights users on 2/9. 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 3/21:50 pm
MCI
-
SYD
2 stops26h 45m
Multiple Airlines
Tue 3/106:05 am
SYD
-
MCI
2 stops23h 03m
Multiple Airlines
Deal found 2/9$1,190
This Air Canada deal was found by Cheapflights users on 2/8. 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 5/41:00 pm
STL
-
SYD
2 stops27h 20m
Air Canada
Mon 5/189:20 am
SYD
-
STL
2 stops25h 45m
Air Canada
Deal found 2/8$1,196
This Air Canada deal was found by Cheapflights users on 2/7. 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 8/54:50 pm
STL
-
SYD
2 stops23h 30m
Multiple Airlines
Tue 8/259:20 am
SYD
-
STL
2 stops48h 07m
Multiple Airlines
Deal found 2/7$1,197
This Air Canada deal was found by Cheapflights users on 2/9. 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 3/74:05 pm
STL
-
SYD
2 stops47h 30m
Air Canada
Sat 3/1410:20 am
SYD
-
STL
2 stops45h 09m
Air Canada
Deal found 2/9$1,202

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 February 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,047
(oojo)

One-way from

$523
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,348
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. 4% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($22 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 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 February 10, 2026.
Use the filters below to find and compare flights from Missouri to Sydney that are best for you.

Fly from

Missouri

Fly to

Sydney

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 2/13

6:38 am-9:00 am

1 stop33h 22m

Sydney Kingsford Smith

Sun 2/15

7:15 pm-11:59 pm

2 stops45h 44m

$943

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 3/11

6:50 pm-8:50 pm

2 stops34h 00m

Sydney Kingsford Smith

Wed 3/18

11:20 am-11:58 pm

1 stop28h 38m

$1,047

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/4

1:00 pm-7:20 am

2 stops27h 20m

Sydney Kingsford Smith

Mon 5/18

9:20 am-8:05 pm

2 stops25h 45m

$1,151

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 3/2

1:50 pm-9:35 am

2 stops26h 45m

Sydney Kingsford Smith

Tue 3/10

6:05 am-1:08 pm

2 stops23h 03m

$1,190

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 5/2

1:00 pm-7:20 am

2 stops51h 20m

Sydney Kingsford Smith

Sat 5/16

9:20 am-8:05 pm

2 stops25h 45m

$1,193

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 5/10

1:00 pm-7:20 am

2 stops51h 20m

Sydney Kingsford Smith

Sun 5/17

9:20 am-8:05 pm

2 stops25h 45m

$1,196

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 3/29

4:05 pm-8:20 am

2 stops48h 15m

Sydney Kingsford Smith

Tue 4/7

9:20 am-3:24 pm

2 stops45h 04m

$1,205

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 3/4

1:58 pm-6:55 am

1 stop23h 57m

Sydney Kingsford Smith

Wed 3/18

6:05 am-1:08 pm

2 stops23h 03m

$1,263

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Tue 5/19

2:33 pm-6:55 am

1 stop25h 22m

Sydney Kingsford Smith

Wed 5/27

10:30 am-6:49 pm

2 stops23h 19m

$1,284

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 4/20

2:33 pm-8:00 am

2 stops26h 27m

Sydney Kingsford Smith

Mon 5/11

10:30 am-7:21 pm

2 stops23h 51m

$1,339

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/6

Showing 1-10 of 36 results
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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, October is the cheapest month in which you can book a flight from Missouri to Sydney (average of $636). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,234). 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?

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 $1,151, Qantas Airways can have you in Sydney from Missouri in 27h 20m. The distance from Missouri to Sydney is about 9054 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, October is the cheapest month in which you can book a flight from Missouri to Sydney (average of $636). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,234). 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
Manly

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Missouri to Sydney

Discover the top 6 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 February 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$551Average$1,286FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$608Average$1,173FlexibilityNo cancel feeOn-time67%
DeltaCheapest$848Average$1,466FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$1,044Average$1,486FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$1,130Average$1,407FlexibilityNo cancel feeOn-time74%
Fiji AirwaysCheapest$1,132Average$1,222FlexibilityNo cancel feeOn-time74%

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