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Cheap flights from Missouri to Sydney from $745

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 18/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
11 Mar — 18 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 9 February 2026.

Wed 11/207:04
STL
-
SYD
1 stop32h 56m
Qantas Airways
Fri 20/207:05
SYD
-
STL
2 stops33h 54m
Qantas Airways
Deal found 7/2$1,271
Wed 11/207:04
STL
-
SYD
1 stop32h 56m
Qantas Airways
Wed 25/217:50
SYD
-
STL
2 stops40h 23m
Qantas Airways
Deal found 7/2$1,298
Thu 12/206:38
STL
-
SYD
2 stops42h 02m
Qantas Airways
Sun 22/211:20
SYD
-
STL
1 stop29h 39m
Qantas Airways
Deal found 6/2$1,314
Thu 26/218:50
STL
-
SYD
2 stops33h 00m
Qantas Airways
Thu 5/317:45
SYD
-
STL
1 stop23h 14m
Qantas Airways
Deal found 8/2$1,510
Wed 11/213:56
MCI
-
SYD
2 stops25h 04m
Multiple Airlines
Fri 13/313:00
SYD
-
MCI
2 stops22h 03m
Multiple Airlines
Deal found 6/2$1,695
Mon 23/216:13
STL
-
SYD
1 stop21h 42m
Qantas Airways
Mon 2/311:40
SYD
-
STL
2 stops29h 19m
Qantas Airways
Deal found 6/2$1,697
Mon 4/513:00
STL
-
SYD
2 stops51h 20m
Air Canada
Mon 18/509:20
SYD
-
STL
2 stops25h 45m
Air Canada
Deal found 9/2$1,704
Wed 5/816:50
STL
-
SYD
2 stops23h 30m
Multiple Airlines
Tue 25/809:20
SYD
-
STL
2 stops48h 07m
Multiple Airlines
Deal found 7/2$1,705
Wed 11/1113:30
STL
-
SYD
2 stops27h 05m
Air Canada
Wed 18/1111:20
SYD
-
STL
2 stops45h 10m
Air Canada
Deal found 7/2$1,713
Sun 29/316:05
STL
-
SYD
2 stops48h 15m
Air Canada
Tue 7/409:20
SYD
-
STL
2 stops45h 04m
Air Canada
Deal found 7/2$1,717
Wed 4/313:58
MCI
-
SYD
1 stop23h 57m
Qantas Airways
Wed 18/306:05
SYD
-
MCI
2 stops23h 03m
Qantas Airways
Deal found 5/2$1,730
Mon 23/318:50
STL
-
SYD
2 stops30h 50m
Qantas Airways
Sat 28/311:20
SYD
-
STL
1 stop28h 38m
Qantas Airways
Deal found 8/2$1,762

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 9 February 2026.

Round-trip from

$1,298

One-way from

$745

Popular in

December

Cheapest in

August

Average price

$1,921
Qantas Airways
  • Qantas Airways
  • 23/3-30/3
  • 3 total stops
  • 55h 08m total
  • Missouri to Sydney
Search Deals
15/4
  • 15/4
  • 3 total stops
  • 37h 50m total
  • Missouri to Sydney
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($143 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($45 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 9 February 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

Mon 23/3

18:50-20:50

2 stops34h 00m

Sydney Kingsford Smith

Mon 30/3

18:50-23:58

1 stop21h 08m

$1,298

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 13/3

13:58-08:35

2 stops26h 37m

Sydney Kingsford Smith

Fri 20/3

13:00-19:03

2 stops22h 03m

$1,695

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 23/2

16:13-06:55

1 stop21h 42m

Sydney Kingsford Smith

Mon 2/3

11:40-23:59

2 stops29h 19m

$1,697

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 10/5

13:00-07:20

2 stops51h 20m

Sydney Kingsford Smith

Sun 17/5

09:20-20:05

2 stops25h 45m

$1,704

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

13:00-07:20

2 stops51h 20m

Sydney Kingsford Smith

Mon 18/5

09:20-20:05

2 stops25h 45m

$1,704

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 29/3

16:05-08:20

2 stops48h 15m

Sydney Kingsford Smith

Tue 7/4

09:20-15:24

2 stops45h 04m

$1,717

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 4/3

13:58-06:55

1 stop23h 57m

Sydney Kingsford Smith

Wed 18/3

06:05-13:08

2 stops23h 03m

$1,730

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 2/5

13:00-07:20

2 stops51h 20m

Sydney Kingsford Smith

Sat 16/5

09:20-20:05

2 stops49h 45m

$1,764

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 4/3

16:05-09:35

2 stops48h 30m

Sydney Kingsford Smith

Tue 10/3

10:20-15:29

2 stops45h 09m

$1,775

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 7/3

06:38-09:00

1 stop33h 22m

Sydney Kingsford Smith

Sat 14/3

17:50-15:28

2 stops37h 38m

$1,775

Flights are sorted by cheapest return flights first.

Deals found on 6/2

Showing 1-10 of 31 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, October is the cheapest month in which you can book a flight from Missouri to Sydney (average of $906). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,758). 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.

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 and Air Canada fly from Missouri to Sydney in about 34h. The time it takes to get you to your destination can typically vary by up to 17h 20m. Airlines will cover a distance of 14571 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, October is the cheapest month in which you can book a flight from Missouri to Sydney (average of $906). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,758). 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
Penrith
Manly
Katoomba
Terrigal
Lithgow
Leura
Coogee
Cronulla
Randwick
Bondi Beach

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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.

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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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