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Cheap flights from Missouri to Sydney from $852

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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
27 12月 — 3 1月1
1 adult
1 adult, Economy, 0 bags

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 27 11月 2025.

Round-trip from

$1,519

One-way from

$852

Popular in

December

Cheapest in

August

Average price

$2,093
Qantas Airways
  • Qantas Airways
  • 31/1-28/2
  • 3 total stops
  • 67h 49m total
  • Missouri to Sydney
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5/3
  • 5/3
  • 3 total stops
  • 50h 24m total
  • Missouri to Sydney
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($209 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($68 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Missouri to Sydney

Enter your travel dates to find the best prices.

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 27 11月 2025.

週五 28/1107:00STL - SYD
2 stops33h 50mQantas Airways
週日 14/1214:05SYD - STL
1 stop20h 00mQantas Airways
Deal found 26/11$1,645
週三 10/1213:20STL - SYD
1 stop24h 35mQantas Airways
週六 10/121:55SYD - STL
2 stops33h 52mQantas Airways
Deal found 25/11$1,670
週三 3/1213:20STL - SYD
1 stop24h 35mQantas Airways
週三 10/1217:30SYD - STL
2 stops23h 27mQantas Airways
Deal found 25/11$1,694
週一 1/1213:20STL - SYD
1 stop24h 35mAmerican Airlines
週一 8/1214:05SYD - STL
1 stop22h 24mAmerican Airlines
Deal found 27/11$1,896
週三 3/1217:38MCI - SYD
1 stop20h 17mQantas Airways
週三 10/1214:05SYD - MCI
1 stop22h 08mQantas Airways
Deal found 26/11$1,903
週三 3/1206:55STL - SYD
2 stops35h 00mQantas Airways
週五 12/1217:00SYD - STL
2 stops23h 57mQantas Airways
Deal found 25/11$2,003
週三 3/1206:55STL - SYD
2 stops36h 20mQantas Airways
週六 13/1219:40SYD - STL
2 stops33h 54mQantas Airways
Deal found 25/11$2,014
週二 2/1213:35STL - SYD
2 stops24h 20mAir Canada
週五 12/1211:20SYD - STL
2 stops22h 08mAir Canada
Deal found 25/11$2,019
週一 1/1216:05STL - SYD
2 stops45h 50mAir Canada
週六 13/1216:00SYD - STL
2 stops37h 39mAir Canada
Deal found 25/11$2,029
週三 3/1215:04MCI - SYD
1 stop22h 51mQantas Airways
週三 7/120:10SYD - MCI
2 stops33h 55mQantas Airways
Deal found 25/11$2,154
週六 27/1213:59MCI - SYD
2 stops27h 56mQantas Airways
週六 10/117:30SYD - MCI
2 stops40h 17mQantas Airways
Deal found 25/11$2,930
週六 27/1215:00MCI - SYD
1 stop23h 00mUnited Airlines
週六 10/111:20SYD - MCI
2 stops29h 10mUnited Airlines
Deal found 26/11$3,023

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 27 11月 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

週六 31/1

07:04-20:50

2 stops44h 46m

Sydney Kingsford Smith

週六 28/2

17:45-23:48

1 stop23h 03m

$1,519

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

週六 31/1

16:05-09:35

2 stops48h 30m

Sydney Kingsford Smith

週六 28/2

11:20-20:26

2 stops26h 06m

$1,553

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

週一 4/5

16:30-07:20

2 stops23h 50m

Sydney Kingsford Smith

週一 18/5

09:20-15:16

2 stops44h 56m

$1,577

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

週一 4/5

13:30-07:20

3 stops50h 50m

Sydney Kingsford Smith

週一 18/5

09:20-15:16

2 stops44h 56m

$1,581

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

週四 22/1

07:00-07:25

2 stops31h 25m

Sydney Kingsford Smith

週四 29/1

17:45-23:33

2 stops22h 48m

$1,719

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

週四 22/1

13:56-06:55

1 stop23h 59m

Sydney Kingsford Smith

週四 29/1

21:55-13:05

2 stops32h 10m

$1,722

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

週四 15/1

17:04-06:55

1 stop20h 51m

Sydney Kingsford Smith

週五 30/1

17:45-23:59

1 stop23h 14m

$1,760

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

週一 4/5

18:00-06:55

1 stop21h 55m

Sydney Kingsford Smith

週一 18/5

12:00-18:17

1 stop21h 17m

$1,760

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

週四 15/1

17:04-06:55

1 stop20h 51m

Sydney Kingsford Smith

週五 30/1

17:45-23:59

1 stop23h 14m

$1,760

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

週五 1/5

18:00-06:55

1 stop21h 55m

Sydney Kingsford Smith

週六 9/5

17:50-23:16

1 stop20h 26m

$1,760

Flights are sorted by cheapest return flights first.

Deals found on 25/11

Showing 1-10 of 22 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 return 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 $873). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,905). 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 27 11月 2025.

It’s typically best to fly out from Missouri to Sydney in the evening. Doing so could potentially save you 44% on the flight price compared to flying in the afternoon, which is usually more expensive.

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?

    If you book a flight to Sydney from Missouri, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 7.5 km from the centre of Sydney.

  • How long is the flight from Missouri to Sydney?

    Airlines like Qantas Airways, Air Canada, and Delta fly from Missouri to Sydney in about 23h 50m. The time it takes to get you to your destination can typically vary by up to 24h 40m. Airlines will cover a distance of 14225 km. This flight may include one or multiple stops.

  • 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 holiday 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 $873). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,905). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Penrith
Terrigal
Manly
Randwick
Lithgow
Coogee
Leura
Bondi Beach
Cronulla

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How does Cheapflights help users find flights from Missouri to Sydney?

Deals for Missouri to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Missouri to Sydney?

Cheapflights simply makes it quick and affordable to book flights from Missouri to Sydney by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Missouri to Sydney with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Missouri to Sydney flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Missouri to Sydney become cheaper?

Of course! You can now track prices for flights from Missouri to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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