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$656+ 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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap flight deals from Missouri to Sydney

Keep the following information in mind while searching for Missouri to Sydney flight deals. Data was last updated November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,060
(oojo)

One-way from

$656
(oojo)

Popular in

December

Cheapest in

August

Average price

$1,385
Provider with most accurate pricing for Lambert-St Louis-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Sydney Kingsford Smith flights.
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From Missouri to Sydney Kingsford Smith
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One-way flight from Missouri to Sydney Kingsford Smith
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Highest demand for flights based on searches. 6% potential increase in price ($100 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 6, 2025.

This Justfly.com deal was found by Cheapflights users on 11/5. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:00 amSTL - SYD
1 stop33h 00mQantas Airways
Fri 12/57:15 pmSYD - STL
2 stops34h 26mQantas Airways
Deal found 11/5$1,104
This Travelocity deal was found by Cheapflights users on 11/5. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amMCI - SYD
2 stops34h 35mAir Canada
Thu 12/114:00 pmSYD - MCI
2 stops41h 10mAir Canada
Deal found 11/5$1,163
This Orbitz deal was found by Cheapflights users on 11/4. 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.
Fri 12/55:10 pmMCI - SYD
2 stops44h 45mAir Canada
Sat 12/1311:20 amSYD - MCI
2 stops42h 20mAir Canada
Deal found 11/4$1,175
This oojo deal was found by Cheapflights users on 11/5. 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 11/67:00 amSTL - SYD
1 stop31h 25mQantas Airways
Thu 11/135:50 pmSYD - STL
2 stops38h 39mQantas Airways
Deal found 11/5$1,230
This oojo deal was found by Cheapflights users on 11/6. 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 11/197:00 amSTL - SYD
1 stop33h 00mQantas Airways
Wed 12/35:50 pmSYD - STL
2 stops35h 44mQantas Airways
Deal found 11/6$1,234
This oojo deal was found by Cheapflights users on 11/4. 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 11/57:00 amSTL - SYD
2 stops33h 20mQantas Airways
Sun 11/232:05 pmSYD - STL
1 stop19h 27mQantas Airways
Deal found 11/4$1,242
This American Airlines deal was found by Cheapflights users on 11/3. 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.
Tue 11/47:00 amSTL - SYD
1 stop31h 25mAmerican Airlines
Tue 11/112:05 pmSYD - STL
1 stop25h 53mAmerican Airlines
Deal found 11/3$1,248
This American Airlines deal was found by Cheapflights users on 11/4. 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 11/51:45 pmMCI - SYD
2 stops26h 15mAmerican Airlines
Wed 11/1211:20 amSYD - MCI
2 stops29h 18mAmerican Airlines
Deal found 11/4$1,251
This Justfly.com deal was found by Cheapflights users on 11/6. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/283:59 pmSTL - SYD
2 stops48h 11mQantas Airways
Sun 12/1411:20 amSYD - STL
1 stop29h 37mQantas Airways
Deal found 11/6$1,257
This FlightHub deal was found by Cheapflights users on 11/5. 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.
Fri 11/284:05 pmSTL - SYD
2 stops48h 30mAir Canada
Sun 12/1411:20 amSYD - STL
2 stops45h 09mAir Canada
Deal found 11/5$1,262
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Wed 11/55:35 pmMCI - SYD
1 stop22h 40mUnited Airlines
Wed 11/1211:50 amSYD - MCI
1 stop19h 23mUnited Airlines
Deal found 11/4$1,263
This oojo deal was found by Cheapflights users on 11/5. 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 11/121:20 pmSTL - SYD
1 stop24h 35mQantas Airways
Sun 11/236:05 amSYD - STL
2 stops23h 32mQantas Airways
Deal found 11/5$1,274

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 November 6, 2025.
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

Thu 1/29

7:04 am-9:00 am

1 stop32h 56m

Sydney Kingsford Smith

Wed 2/18

7:05 am-11:48 pm

2 stops33h 43m

$1,060

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 2/1

5:45 am-9:35 am

2 stops34h 50m

Sydney Kingsford Smith

Sun 2/15

11:20 am-4:19 pm

2 stops21h 59m

$1,092

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 2/23

1:50 pm-9:35 am

2 stops26h 45m

Sydney Kingsford Smith

Sun 3/8

11:20 am-10:17 pm

2 stops27h 57m

$1,101

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 1/25

7:04 am-9:00 am

1 stop32h 56m

Sydney Kingsford Smith

Sun 2/1

7:15 pm-4:14 pm

2 stops37h 59m

$1,152

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 12/4

6:00 am-9:35 am

2 stops34h 35m

Sydney Kingsford Smith

Thu 12/11

4:00 pm-4:10 pm

2 stops41h 10m

$1,163

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 12/5

5:10 pm-6:55 am

2 stops44h 45m

Sydney Kingsford Smith

Sat 12/13

11:20 am-12:40 pm

2 stops42h 20m

$1,175

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/4

1:30 pm-7:20 am

3 stops50h 50m

Sydney Kingsford Smith

Mon 5/18

9:20 am-6:25 pm

2 stops48h 05m

$1,236

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/4

6:00 pm-6:55 am

1 stop21h 55m

Sydney Kingsford Smith

Mon 5/18

9:10 am-11:16 pm

1 stop29h 06m

$1,247

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 1/19

1:56 pm-9:00 am

2 stops26h 04m

Sydney Kingsford Smith

Mon 2/2

2:05 pm-9:27 pm

1 stop24h 22m

$1,252

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 1/19

3:46 pm-8:30 am

1 stop23h 44m

Sydney Kingsford Smith

Mon 2/2

10:40 am-2:49 pm

1 stop21h 09m

$1,264

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 34 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, May is the cheapest month in which you can book a flight from Missouri to Sydney (average of $568). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,242). 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.

What is the cheapest time of day to fly from MO to SYD?

Find hourly flight availability from Missouri to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 9% on flights from Missouri to Sydney by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Missouri to Sydney?

Use this chart to determine the cheapest time to fly round-trip from Missouri to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Missouri to Sydney flight should consider departing on Wednesday at noon when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 $1,247, Qantas Airways can have you in Sydney from Missouri in 21h 55m. The distance from Missouri to Sydney is about 9054 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Missouri to Sydney one-way?

    To fly one-way, consider booking your trip with Fiji Airways, which is currently one of the cheapest options available, starting at $656. Qantas Airways flights start at $829 while deals on American Airlines start at $843 one-way.

  • 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 $568). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,242). 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
Coogee

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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,315FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$897Average$1,202FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$1,044Average$1,485FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$1,130Average$1,485FlexibilityNo cancel feeOn-time74%
Fiji AirwaysCheapest$1,132Average$1,222FlexibilityNo cancel feeOn-time74%
DeltaCheapest$1,211Average$1,436FlexibilityNo cancel feeOn-timeN/A

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