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Cheap flights from Missouri to Sydney from $853

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
23 Jul — 30 Jul1
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 18 July 2025.

Round-trip from

$1,549

One-way from

$853

Popular in

December

Cheapest in

August

Average price

$2,147
Air Canada
  • Air Canada
  • 14/8-21/8
  • 4 total stops
  • 60h 42m total
  • Missouri to Sydney
Search Deals
Air Canada
  • Air Canada
  • 5/8
  • 2 total stops
  • 31h 05m total
  • Missouri to Sydney
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($253 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($85 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 18 July 2025.

Thu 14/806:00MCI - SYD
2 stops34h 20mAir Canada
Thu 21/809:20SYD - MCI
2 stops26h 22mAir Canada
Deal found 17/7$1,549
Wed 3/918:26MCI - SYD
1 stop21h 29mQantas Airways
Wed 17/912:10SYD - MCI
1 stop20h 15mQantas Airways
Deal found 16/7$1,609
Mon 1/912:10MCI - SYD
1 stop27h 45mAmerican Airlines
Sun 14/912:10SYD - MCI
1 stop21h 56mAmerican Airlines
Deal found 16/7$1,632
Mon 1/917:59MCI - SYD
1 stop21h 56mUnited Airlines
Mon 8/910:20SYD - MCI
2 stops26h 22mUnited Airlines
Deal found 18/7$1,658
Wed 5/1106:15STL - SYD
2 stops47h 10mQantas Airways
Sun 23/1114:20SYD - STL
1 stop20h 57mQantas Airways
Deal found 18/7$1,664
Thu 25/907:00MCI - SYD
1 stop32h 35mDelta
Thu 2/1009:25SYD - MCI
1 stop28h 55mDelta
Deal found 15/7$1,667
Sun 31/813:30STL - SYD
2 stops26h 50mAir Canada
Sun 7/909:20SYD - STL
2 stops49h 37mAir Canada
Deal found 17/7$1,681
Wed 29/1016:55STL - SYD
2 stops23h 40mMultiple Airlines
Sat 15/1111:20SYD - STL
2 stops45h 09mMultiple Airlines
Deal found 17/7$1,743
Mon 1/919:41STL - SYD
1 stop20h 14mAmerican Airlines
Mon 8/909:10SYD - STL
1 stop28h 49mAmerican Airlines
Deal found 17/7$1,797
Sun 23/1106:15MCI - SYD
2 stops33h 30mAir New Zealand
Fri 5/1207:45SYD - MCI
2 stops26h 01mAir New Zealand
Deal found 18/7$1,803
Mon 1/917:49STL - SYD
1 stop22h 06mUnited Airlines
Mon 8/910:20SYD - STL
1 stop21h 33mUnited Airlines
Deal found 18/7$1,822
Sat 16/815:34MCI - SYD
2 stops32h 06mMultiple Airlines
Thu 21/817:45SYD - MCI
1 stop35h 16mMultiple Airlines
Deal found 17/7$1,985

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 18 July 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

Thu 14/8

06:00-07:20

2 stops34h 20m

Sydney Kingsford Smith

Thu 21/8

09:20-20:42

2 stops26h 22m

$1,549

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 3/9

18:26-06:55

1 stop21h 29m

Sydney Kingsford Smith

Wed 17/9

12:10-17:25

1 stop20h 15m

$1,609

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 1/9

12:10-06:55

1 stop27h 45m

Sydney Kingsford Smith

Sun 14/9

12:10-19:06

1 stop21h 56m

$1,632

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 1/9

17:59-06:55

1 stop21h 56m

Sydney Kingsford Smith

Mon 8/9

10:20-21:42

2 stops26h 22m

$1,658

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 5/11

06:15-22:25

2 stops47h 10m

Sydney Kingsford Smith

Sun 23/11

14:20-18:17

1 stop20h 57m

$1,664

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 25/9

07:00-06:35

1 stop32h 35m

Sydney Kingsford Smith

Thu 2/10

09:25-23:20

1 stop28h 55m

$1,667

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 31/8

13:30-07:20

2 stops26h 50m

Sydney Kingsford Smith

Sun 7/9

09:20-19:57

2 stops49h 37m

$1,681

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 29/10

16:55-08:35

2 stops23h 40m

Sydney Kingsford Smith

Sat 15/11

11:20-15:29

2 stops45h 09m

$1,743

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 1/9

19:41-06:55

1 stop20h 14m

Sydney Kingsford Smith

Mon 8/9

09:10-22:59

1 stop28h 49m

$1,797

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 23/11

06:15-08:45

2 stops33h 30m

Sydney Kingsford Smith

Fri 5/12

07:45-16:46

2 stops26h 01m

$1,803

Flights are sorted by cheapest return flights first.

Deals found on 16/7

Showing 1-10 of 16 results
1
2

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 18 July 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.

How much does it cost for a return flight from Missouri to Sydney?

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 18 July 2025.
See what other customers who have flown with Delta, Air New Zealand, andQantas Airways from Missouri to Sydney have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,958 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very Good
7,958 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air New Zealand
8.0
Very Good
496 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Qantas Airways
7.5
Good
879 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,865 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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 $853 on Air Canada. Other airlines that offer cheap prices include Qantas Airways from $973 and United Airlines from $1,001 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 $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
Manly
Coogee
Cronulla
Terrigal
Lithgow
Randwick
Bondi Beach
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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