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Cheap flights from Missouri to Sydney from $831

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 17/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
13 Dec — 20 Dec1
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 13 November 2025.

Round-trip from

$1,659

One-way from

$831

Popular in

December

Cheapest in

August

Average price

$2,082
Qantas Airways
  • Qantas Airways
  • 28/11-14/12
  • 3 total stops
  • 53h 42m total
  • Missouri to Sydney
Search Deals
17/1
  • 17/1
  • 2 total stops
  • 54h 10m total
  • Missouri to Sydney
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($202 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($67 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 13 November 2025.

Sun 16/1117:35MCI - SYD
1 stop20h 20mQantas Airways
Sat 22/1118:35SYD - MCI
2 stops35h 36mQantas Airways
Deal found 11/11$1,561
Fri 28/1113:20STL - SYD
1 stop24h 35mQantas Airways
Sun 14/1207:20SYD - STL
2 stops29h 07mQantas Airways
Deal found 11/11$1,659
Wed 12/1107:00STL - SYD
2 stops34h 20mQantas Airways
Sun 23/1114:05SYD - STL
1 stop19h 27mQantas Airways
Deal found 11/11$1,691
Thu 11/1218:13STL - SYD
2 stops30h 27mQantas Airways
Thu 18/1211:20SYD - STL
1 stop29h 31mQantas Airways
Deal found 11/11$1,741
Sun 16/1117:35MCI - SYD
2 stops25h 00mQantas Airways
Tue 18/1114:05SYD - MCI
1 stop19h 38mQantas Airways
Deal found 12/11$1,787
Sat 15/1117:49MCI - SYD
1 stop20h 06mQantas Airways
Mon 1/1210:35SYD - MCI
2 stops43h 19mQantas Airways
Deal found 11/11$1,816
Thu 11/1213:16STL - SYD
2 stops26h 44mMultiple Airlines
Thu 18/1217:45SYD - STL
2 stops44h 40mMultiple Airlines
Deal found 11/11$1,874
Sat 29/1115:59STL - SYD
2 stops28h 56mQantas Airways
Tue 9/1207:20SYD - STL
2 stops26h 14mQantas Airways
Deal found 11/11$2,063
Fri 12/1215:04MCI - SYD
2 stops28h 11mQantas Airways
Fri 19/1207:05SYD - MCI
2 stops23h 03mQantas Airways
Deal found 12/11$2,278
Mon 1/1208:10MCI - SYD
2 stops33h 20mAir New Zealand
Fri 5/1207:45SYD - MCI
2 stops26h 01mAir New Zealand
Deal found 12/11$2,372
Sun 16/1107:00MCI - SYD
2 stops43h 45mAlaska Airlines
Sat 22/1121:40SYD - MCI
2 stops33h 56mAlaska Airlines
Deal found 11/11$2,399
Fri 12/1215:55MCI - SYD
1 stop23h 35mDelta
Fri 19/1210:40SYD - MCI
1 stop21h 20mDelta
Deal found 12/11$2,626

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 13 November 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 11/12

13:16-09:00

2 stops26h 44m

Sydney Kingsford Smith

Thu 18/12

17:45-21:25

2 stops44h 40m

$1,874

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 28/11

07:00-09:50

2 stops33h 50m

Sydney Kingsford Smith

Sun 14/12

14:05-19:27

1 stop22h 22m

$1,891

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

14:33-07:30

2 stops25h 57m

Sydney Kingsford Smith

Mon 18/5

17:45-23:47

2 stops21h 02m

$1,958

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 8/4

15:45-06:35

1 stop23h 50m

Sydney Kingsford Smith

Fri 1/5

09:25-23:10

1 stop28h 45m

$1,966

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

06:00-06:35

2 stops33h 35m

Sydney Kingsford Smith

Mon 18/5

09:25-18:00

2 stops23h 35m

$1,981

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 11/3

06:30-10:55

2 stops36h 25m

Sydney Kingsford Smith

Wed 18/3

07:20-23:09

2 stops31h 49m

$1,995

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Tue 3/2

05:45-09:35

2 stops34h 50m

Sydney Kingsford Smith

Sun 15/2

11:20-16:19

2 stops21h 59m

$2,029

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Tue 3/2

15:46-06:50

1 stop22h 04m

Sydney Kingsford Smith

Sun 15/2

10:40-14:49

1 stop21h 09m

$2,052

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 11/3

15:45-07:25

1 stop23h 40m

Sydney Kingsford Smith

Mon 23/3

09:40-14:49

1 stop21h 09m

$2,052

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

13:30-07:20

3 stops50h 50m

Sydney Kingsford Smith

Mon 18/5

09:20-18:25

2 stops48h 05m

$2,089

Flights are sorted by cheapest return flights first.

Deals found on 10/11

Showing 1-10 of 24 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 $869). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,896). 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 13 November 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.

How much does it cost for a return flight 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?

    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, American Airlines, 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 10h. Airlines will cover a distance of 14225 km. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as $883 on American Airlines. Other airlines that offer cheap prices include Qantas Airways from $1,070 and Delta from $1,166 one-way.

  • 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 $869). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,896). 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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