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$506+ Cheap flights from Missouri to Sydney (SYD)

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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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 June 30, 2025.

Round-trip from

$830
(United Airlines)

One-way from

$506
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,418
From Missouri to Sydney Kingsford Smith
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One-way flight from Missouri to Sydney Kingsford Smith
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Highest demand for flights based on searches. 10% potential increase in price ($176 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 30, 2025.

This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/149:01 amCOU - SYD
2 stops30h 59mUnited Airlines
Tue 10/2111:20 amSYD - COU
2 stops25h 05mUnited Airlines
Deal found 6/29$830
This Ovago deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:26 pmMCI - SYD
1 stop21h 29mQantas Airways
Wed 9/1712:10 pmSYD - MCI
1 stop20h 15mQantas Airways
Deal found 6/28$994
This oojo deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/284:07 pmSTL - SYD
2 stops25h 48mQantas Airways
Sun 12/142:20 pmSYD - STL
1 stop18h 47mQantas Airways
Deal found 6/30$1,010
This Orbitz deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:00 amMCI - SYD
2 stops34h 20mAir Canada
Thu 10/29:20 amSYD - MCI
2 stops29h 10mAir Canada
Deal found 6/27$1,039
This Air Canada deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/31:45 pmMCI - SYD
2 stops26h 35mMultiple Airlines
Wed 9/179:20 amSYD - MCI
2 stops26h 22mMultiple Airlines
Deal found 6/29$1,048
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/31:03 pmMCI - SYD
2 stops27h 02mAmerican Airlines
Wed 9/179:10 amSYD - MCI
2 stops22h 58mAmerican Airlines
Deal found 6/28$1,063
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:05 pmMCI - SYD
1 stop21h 50mUnited Airlines
Thu 10/29:30 amSYD - MCI
2 stops27h 15mUnited Airlines
Deal found 6/27$1,074
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:45 amMCI - SYD
2 stops33h 50mDelta
Sat 9/209:25 amSYD - MCI
1 stop20h 18mDelta
Deal found 6/30$1,080
This Air Canada deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/141:30 pmSTL - SYD
2 stops26h 50mAir Canada
Thu 9/259:20 amSYD - STL
2 stops25h 37mAir Canada
Deal found 6/30$1,136
This Air Canada deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/141:30 pmSTL - SYD
2 stops26h 50mMultiple Airlines
Sat 9/279:20 amSYD - STL
2 stops22h 12mMultiple Airlines
Deal found 6/28$1,146
This Fareboom deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/214:32 pmSTL - SYD
2 stops25h 13mAir New Zealand
Thu 9/411:50 amSYD - STL
2 stops25h 18mAir New Zealand
Deal found 6/30$1,147
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/16:14 amSTL - SYD
1 stop33h 51mAmerican Airlines
Thu 8/149:10 amSYD - STL
1 stop28h 59mAmerican Airlines
Deal found 6/28$1,157

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated June 30, 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

ColumbiaSydney

COU - SYD

COUSYD

Columbia Regional

Tue 10/14

9:01 am-8:00 am

2 stops30h 59m

Sydney Kingsford Smith

Tue 10/21

11:20 am-8:25 pm

2 stops25h 05m

$830

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 9/3

6:26 pm-6:55 am

1 stop21h 29m

Sydney Kingsford Smith

Wed 9/17

12:10 pm-5:25 pm

1 stop20h 15m

$994

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Tue 8/12

6:00 am-7:20 am

2 stops34h 20m

Sydney Kingsford Smith

Thu 10/2

9:20 am-11:30 pm

2 stops29h 10m

$1,039

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 9/3

1:45 pm-7:20 am

2 stops26h 35m

Sydney Kingsford Smith

Wed 9/17

9:20 am-8:42 pm

2 stops26h 22m

$1,048

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 9/3

1:03 pm-7:05 am

2 stops27h 02m

Sydney Kingsford Smith

Wed 9/17

9:10 am-5:08 pm

2 stops22h 58m

$1,063

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Tue 8/12

6:05 pm-6:55 am

1 stop21h 50m

Sydney Kingsford Smith

Thu 10/2

9:30 am-9:45 pm

2 stops27h 15m

$1,074

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 9/5

5:45 am-6:35 am

2 stops33h 50m

Sydney Kingsford Smith

Sat 9/20

9:25 am-2:43 pm

1 stop20h 18m

$1,080

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/14

4:02 pm-6:55 am

1 stop23h 53m

Sydney Kingsford Smith

Thu 9/25

9:10 am-10:59 pm

1 stop28h 49m

$1,087

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/14

1:30 pm-7:20 am

2 stops26h 50m

Sydney Kingsford Smith

Thu 9/25

9:20 am-7:57 pm

2 stops25h 37m

$1,136

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/14

1:30 pm-7:20 am

2 stops26h 50m

Sydney Kingsford Smith

Sat 9/27

9:20 am-4:32 pm

2 stops22h 12m

$1,146

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 27 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 round-trip 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, March is the cheapest month in which you can book a flight from Missouri to Sydney (average of $1,039). Flying from Missouri to Sydney in December is currently the most expensive (average of $1,636). 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 June 30, 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 to fly round-trip 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 June 30, 2025.
Read through reviews of airlines operating flights from Missouri to Sydney, such as Alaska Airlines, Delta, and Air New Zealand. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,969 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Air New Zealand
8.0
Very good
486 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Qantas Airways
7.5
Good
869 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Qatar Airways
7.4
Good
3,596 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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?

    Sydney Kingsford Smith (SYD) is the airport you will fly into if you book a flight from Missouri to Sydney. It is only a 4.6 mi journey from Kingsford Smith (SYD) to Sydney’s city center.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $569. Air Canada flights start at $571 while deals on Qantas Airways start at $625 one-way.

  • What are the most popular routes from Missouri to Sydney?

    The most popular route from Missouri to Sydney is Lambert-St Louis - Sydney Kingsford Smith. You may also consider Kansas City - Sydney Kingsford Smith or Columbia Regional - Sydney Kingsford Smith.

  • 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 vacation 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, March is the cheapest month in which you can book a flight from Missouri to Sydney (average of $1,039). Flying from Missouri to Sydney in December is currently the most expensive (average of $1,636). 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

Traveling to a place near Missouri?

Book flights to Missouri if you plan to visit one of these locations
Wollongong
Parramatta
Manly
Coogee

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Alternative routes for Missouri to Sydney

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Top 7 airlines flying from Missouri to Sydney

Discover the top 7 airlines that operate flights from Missouri to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,373FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$912Average$1,281FlexibilityNo cancel feeOn-time67%
Fiji AirwaysCheapest$1,132Average$1,222FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,173Average$1,873FlexibilityNo cancel feeOn-time78%
Qantas AirwaysCheapest$1,185Average$1,621FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,193Average$1,586FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,211Average$1,438FlexibilityNo cancel feeOn-timeN/A

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