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$554+ 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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 17 — May 241
Sun 5/17
Sun 5/24
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 April 17, 2026.

This FlightHub deal was found by Cheapflights users on 4/12. 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.
Wed 8/125:22 pm
MCI
-
SYD
2 stops22h 58m
Air Canada
Fri 8/219:20 am
SYD
-
MCI
2 stops42h 19m
Air Canada
Deal found 4/12$1,223
This Priceline deal was found by Cheapflights users on 4/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:25 am
MCI
-
SYD
2 stops29h 10m
Air Canada
Sat 11/711:20 am
SYD
-
MCI
2 stops26h 32m
Air Canada
Deal found 4/11$1,270
This oojo deal was found by Cheapflights users on 4/12. 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 11/196:13 pm
STL
-
SYD
2 stops30h 27m
Qantas Airways
Mon 11/2311:15 am
SYD
-
STL
1 stop29h 27m
Qantas Airways
Deal found 4/12$1,301
This United Airlines deal was found by Cheapflights users on 4/16. 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 5/48:30 am
STL
-
SYD
1 stop31h 25m
United Airlines
Mon 5/1810:20 am
SYD
-
STL
1 stop23h 02m
United Airlines
Deal found 4/16$1,303
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:50 am
STL
-
SYD
2 stops29h 00m
Delta
Mon 5/189:15 am
SYD
-
STL
2 stops26h 54m
Delta
Deal found 4/16$1,307
This FlightHub deal was found by Cheapflights users on 4/12. 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.
Sun 5/108:49 am
MCI
-
SYD
2 stops31h 31m
Air Canada
Sun 5/179:20 am
SYD
-
MCI
2 stops40h 13m
Air Canada
Deal found 4/12$1,335
This oojo deal was found by Cheapflights users on 4/14. 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 4/158:01 pm
MCI
-
SYD
1 stop19h 54m
Qantas Airways
Wed 4/2212:00 pm
SYD
-
MCI
1 stop22h 21m
Qantas Airways
Deal found 4/14$1,363
This oojo deal was found by Cheapflights users on 4/16. 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 5/46:11 pm
STL
-
SYD
1 stop21h 44m
Qantas Airways
Mon 5/185:50 pm
SYD
-
STL
1 stop21h 09m
Qantas Airways
Deal found 4/16$1,363
This oojo deal was found by Cheapflights users on 4/14. 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.
Tue 10/135:11 pm
STL
-
SYD
1 stop21h 44m
Qantas Airways
Wed 11/182:05 pm
SYD
-
STL
1 stop19h 35m
Qantas Airways
Deal found 4/14$1,382
This oojo deal was found by Cheapflights users on 4/16. 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 9/73:35 pm
STL
-
SYD
1 stop24h 20m
Qantas Airways
Mon 9/1412:00 pm
SYD
-
STL
1 stop21h 14m
Qantas Airways
Deal found 4/16$1,383
This oojo deal was found by Cheapflights users on 4/13. 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 6/226:35 am
STL
-
SYD
2 stops35h 45m
Qantas Airways
Wed 7/812:00 pm
SYD
-
STL
1 stop19h 33m
Qantas Airways
Deal found 4/13$1,388
This oojo deal was found by Cheapflights users on 4/15. 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 5/46:11 pm
STL
-
SYD
1 stop21h 44m
Qantas Airways
Mon 5/1112:00 pm
SYD
-
STL
1 stop22h 30m
Qantas Airways
Deal found 4/15$1,394

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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,223
(FlightHub)

One-way from

$554
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,391
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. 5% potential increase in price ($75 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 April 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 April 17, 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 5/4

4:44 pm-7:00 am

2 stops23h 16m

Sydney Kingsford Smith

Mon 5/18

10:20 am-6:22 pm

1 stop23h 02m

$1,303

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/4

9:26 am-6:50 am

2 stops30h 24m

Sydney Kingsford Smith

Mon 5/18

9:15 am-7:03 pm

2 stops24h 48m

$1,307

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 5/13

5:17 pm-7:20 am

2 stops23h 03m

Sydney Kingsford Smith

Tue 5/26

9:20 am-10:50 am

2 stops40h 30m

$1,335

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 5/31

7:23 pm-6:55 am

1 stop20h 32m

Sydney Kingsford Smith

Sun 6/7

10:20 am-6:17 pm

1 stop22h 57m

$1,417

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 7/2

4:26 pm-7:00 am

1 stop23h 34m

Sydney Kingsford Smith

Wed 7/8

9:30 am-3:45 pm

1 stop21h 15m

$1,467

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 5/10

3:22 pm-6:55 am

2 stops24h 33m

Sydney Kingsford Smith

Sun 5/17

9:30 am-3:36 pm

1 stop21h 06m

$1,488

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 5/13

3:22 pm-6:55 am

2 stops24h 33m

Sydney Kingsford Smith

Tue 5/26

9:30 am-3:45 pm

1 stop21h 15m

$1,488

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 4/23

4:06 pm-7:00 am

1 stop23h 54m

Sydney Kingsford Smith

Thu 4/30

9:30 am-3:36 pm

1 stop21h 06m

$1,517

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 5/28

4:26 pm-7:00 am

1 stop23h 34m

Sydney Kingsford Smith

Thu 6/4

10:20 am-11:25 pm

2 stops28h 05m

$1,588
Quickest round-trip

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 5/29

7:59 pm-6:55 am

1 stop19h 56m

Sydney Kingsford Smith

Fri 6/5

9:30 am-3:45 pm

1 stop21h 15m

$1,588

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 35 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, May is the cheapest month in which you can book a flight from Missouri to Sydney (average of $310). Flying from Missouri to Sydney 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.

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 $1,335, United Airlines can have you in Sydney from Missouri in 23h 03m. 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, May is the cheapest month in which you can book a flight from Missouri to Sydney (average of $310). Flying from Missouri to Sydney 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

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 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 April 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$551Average$1,448FlexibilityNo cancel feeOn-time69%
Fiji AirwaysCheapest$887Average$1,222FlexibilityNo cancel feeOn-time74%
DeltaCheapest$917Average$1,392FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,000Average$1,095FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$1,044Average$1,475FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$1,094Average$1,365FlexibilityNo cancel feeOn-time74%

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