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Cheap flights from Missouri to Sydney from $810

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 21/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
9 Sep — 16 Sep1
1 adult

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 4 September 2025.

Round-trip from

$1,629

One-way from

$810

Popular in

December

Cheapest in

August

Average price

$2,320
American Airlines
  • American Airlines
  • 15/9-23/9
  • 4 total stops
  • 48h 10m total
  • Missouri to Sydney
Search Deals
21/9
  • 21/9
  • 3 total stops
  • 48h 15m total
  • Missouri to Sydney
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($222 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($83 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 4 September 2025.

Wed 3/909:05MCI - SYD
2 stops31h 15mAir Canada
Wed 17/909:20SYD - MCI
2 stops21h 49mAir Canada
Deal found 2/9$1,554
Wed 24/918:26MCI - SYD
1 stop21h 29mQantas Airways
Wed 1/1012:10SYD - MCI
1 stop20h 15mQantas Airways
Deal found 4/9$1,566
Wed 3/918:26MCI - SYD
1 stop21h 29mQantas Airways
Wed 17/912:10SYD - MCI
1 stop20h 15mQantas Airways
Deal found 2/9$1,567
Mon 15/914:53MCI - SYD
2 stops25h 12mAmerican Airlines
Tue 23/909:10SYD - MCI
2 stops24h 55mAmerican Airlines
Deal found 2/9$1,629
Wed 3/915:59MCI - SYD
2 stops24h 31mAmerican Airlines
Wed 17/912:10SYD - MCI
1 stop20h 15mAmerican Airlines
Deal found 2/9$1,630
Sat 6/918:26MCI - SYD
1 stop21h 29mQantas Airways
Mon 8/912:10SYD - MCI
1 stop21h 55mQantas Airways
Deal found 2/9$1,639
Mon 15/915:40MCI - SYD
1 stop23h 55mDelta
Tue 23/909:25SYD - MCI
1 stop20h 18mDelta
Deal found 2/9$1,647
Thu 2/1006:00MCI - SYD
2 stops34h 20mAir Canada
Thu 9/1010:20SYD - MCI
2 stops29h 10mAir Canada
Deal found 3/9$1,650
Fri 5/917:15MCI - SYD
2 stops47h 05mAir Canada
Sat 11/1010:20SYD - MCI
2 stops26h 49mAir Canada
Deal found 2/9$1,652
Fri 14/1109:05MCI - SYD
2 stops31h 30mAir Canada
Fri 12/1211:20SYD - MCI
2 stops26h 27mAir Canada
Deal found 1/9$1,662
Fri 31/1013:47MCI - SYD
2 stops26h 48mAir Canada
Fri 7/1111:20SYD - MCI
2 stops42h 20mAir Canada
Deal found 2/9$1,673
Fri 28/1107:00STL - SYD
2 stops33h 20mQantas Airways
Sun 14/1214:05SYD - STL
1 stop20h 00mQantas Airways
Deal found 2/9$1,693

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 4 September 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

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 15/9

14:53-07:05

2 stops25h 12m

Sydney Kingsford Smith

Tue 23/9

09:10-19:05

2 stops24h 55m

$1,629

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 15/9

15:40-06:35

1 stop23h 55m

Sydney Kingsford Smith

Tue 23/9

09:25-14:43

1 stop20h 18m

$1,647

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 15/9

17:59-06:55

1 stop21h 56m

Sydney Kingsford Smith

Tue 23/9

10:20-17:18

1 stop21h 58m

$1,647

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Tue 21/10

06:00-08:20

2 stops34h 20m

Sydney Kingsford Smith

Tue 11/11

11:20-20:47

2 stops26h 27m

$1,650

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 2/10

06:00-07:20

2 stops34h 20m

Sydney Kingsford Smith

Thu 9/10

10:20-23:30

2 stops29h 10m

$1,650

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 14/11

09:05-09:35

2 stops31h 30m

Sydney Kingsford Smith

Fri 12/12

11:20-20:47

2 stops26h 27m

$1,662

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 31/10

13:47-08:35

2 stops26h 48m

Sydney Kingsford Smith

Fri 7/11

11:20-12:40

2 stops42h 20m

$1,673

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 28/11

07:00-09:20

2 stops33h 20m

Sydney Kingsford Smith

Sun 14/12

14:05-17:05

1 stop20h 00m

$1,693

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 31/10

15:03-06:55

1 stop23h 52m

Sydney Kingsford Smith

Fri 7/11

06:30-16:43

2 stops27h 13m

$1,697

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Tue 10/2

18:09-10:55

2 stops23h 46m

Sydney Kingsford Smith

Tue 3/3

14:05-11:41

1 stop38h 36m

$1,707

Flights are sorted by cheapest return flights first.

Deals found on 2/9

Showing 1-10 of 39 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 $129). Flying from Missouri to Sydney in October is currently the most expensive (average of $171). 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 4 September 2025.

When flying from Missouri to Sydney, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 American Airlines, Delta, and Qantas Airways fly from Missouri to Sydney in about 23h 55m. The time it takes to get you to your destination can typically vary by up to 9h 25m. 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 $129). Flying from Missouri to Sydney in October is currently the most expensive (average of $171). 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
Lithgow
Randwick
Bondi Beach
Coogee
Cronulla
Leura

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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