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Cheap flights from Missouri to Sydney from $772

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
17 May — 24 May1
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 17 April 2026.

Wed 12/817:22
MCI
-
SYD
2 stops22h 58m
Air Canada
Fri 21/809:20
SYD
-
MCI
2 stops42h 19m
Air Canada
Deal found 12/4$1,705
Thu 19/1118:13
STL
-
SYD
2 stops30h 27m
Qantas Airways
Mon 23/1111:15
SYD
-
STL
1 stop29h 27m
Qantas Airways
Deal found 12/4$1,814
Mon 4/508:30
STL
-
SYD
1 stop31h 25m
United Airlines
Mon 18/510:20
SYD
-
STL
1 stop23h 02m
United Airlines
Deal found 16/4$1,817
Mon 4/510:50
STL
-
SYD
2 stops29h 00m
Delta
Mon 18/509:15
SYD
-
STL
2 stops26h 54m
Delta
Deal found 16/4$1,822
Sun 10/508:49
MCI
-
SYD
2 stops31h 31m
Air Canada
Sun 17/509:20
SYD
-
MCI
2 stops40h 13m
Air Canada
Deal found 12/4$1,861
Wed 15/420:01
MCI
-
SYD
1 stop19h 54m
Qantas Airways
Wed 22/412:00
SYD
-
MCI
1 stop22h 21m
Qantas Airways
Deal found 14/4$1,900
Mon 4/518:11
STL
-
SYD
1 stop21h 44m
Qantas Airways
Mon 18/517:50
SYD
-
STL
1 stop21h 09m
Qantas Airways
Deal found 16/4$1,900
Tue 13/1017:11
STL
-
SYD
1 stop21h 44m
Qantas Airways
Wed 18/1114:05
SYD
-
STL
1 stop19h 35m
Qantas Airways
Deal found 14/4$1,927
Mon 7/915:35
STL
-
SYD
1 stop24h 20m
Qantas Airways
Mon 14/912:00
SYD
-
STL
1 stop21h 14m
Qantas Airways
Deal found 16/4$1,928
Wed 9/917:20
MCI
-
SYD
1 stop22h 35m
Qantas Airways
Wed 30/912:00
SYD
-
MCI
1 stop19h 41m
Qantas Airways
Deal found 17/4$1,930
Mon 22/606:35
STL
-
SYD
2 stops35h 45m
Qantas Airways
Wed 8/712:00
SYD
-
STL
1 stop19h 33m
Qantas Airways
Deal found 13/4$1,935
Mon 4/518:11
STL
-
SYD
1 stop21h 44m
Qantas Airways
Mon 11/512:00
SYD
-
STL
1 stop22h 30m
Qantas Airways
Deal found 15/4$1,943

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 17 April 2026.

Round-trip from

$1,705

One-way from

$772

Popular in

December

Cheapest in

March

Average price

$1,939
Air Canada
  • Air Canada
  • 12/8-21/8
  • 4 total stops
  • 65h 17m total
  • Missouri to Sydney
Search Deals
26/5
  • 26/5
  • 3 total stops
  • 52h 31m total
  • Missouri to Sydney
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($143 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($38 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 17 April 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 return flight

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

09:26-06:50

2 stops30h 24m

Sydney Kingsford Smith

Mon 18/5

09:15-19:03

2 stops24h 48m

$1,822

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 31/5

16:48-07:00

2 stops23h 12m

Sydney Kingsford Smith

Sun 7/6

10:20-18:17

1 stop22h 57m

$1,976

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 2/7

16:26-07:00

1 stop23h 34m

Sydney Kingsford Smith

Wed 8/7

09:30-15:45

1 stop21h 15m

$2,045

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 30/4

16:17-07:00

1 stop23h 43m

Sydney Kingsford Smith

Wed 6/5

10:20-23:59

2 stops28h 39m

$2,045

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 12/5

16:06-07:00

2 stops23h 54m

Sydney Kingsford Smith

Tue 19/5

09:30-20:43

2 stops26h 13m

$2,082

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

14:35-06:55

2 stops25h 20m

Sydney Kingsford Smith

Mon 18/5

10:20-18:22

1 stop23h 02m

$2,082

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 13/10

07:00-07:30

2 stops32h 30m

Sydney Kingsford Smith

Fri 13/11

21:25-14:26

2 stops34h 01m

$2,199

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 13/8

14:52-06:55

2 stops25h 03m

Sydney Kingsford Smith

Fri 21/8

10:20-14:30

1 stop19h 10m

$2,214
Fastest return journey

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 29/5

19:59-06:55

1 stop19h 56m

Sydney Kingsford Smith

Fri 5/6

09:30-15:45

1 stop21h 15m

$2,214

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sat 15/8

15:30-06:55

1 stop24h 25m

Sydney Kingsford Smith

Sat 22/8

10:20-14:30

1 stop19h 10m

$2,214

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 26 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 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 $432). Flying from Missouri to Sydney in June is currently the most expensive (average of $1,595). 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 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 Delta and United Airlines fly from Missouri to Sydney in about 23h 12m. The time it takes to get you to your destination can typically vary by up to 7h 12m. 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, May is the cheapest month in which you can book a flight from Missouri to Sydney (average of $432). Flying from Missouri to Sydney in June is currently the most expensive (average of $1,595). 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
Katoomba
Terrigal
Lithgow
Cronulla
Manly
Bondi Beach
Leura
Randwick
Coogee

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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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