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$555+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,141
(Orbitz)

One-way from

$555
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$1,331
Provider with most accurate pricing for Lambert-St Louis-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Sydney Kingsford Smith flights.
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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. 5% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 16, 2025.

This Air Canada deal was found by Cheapflights users on 10/16. 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.
Tue 11/114:05 pmSTL - SYD
2 stops48h 30mAir Canada
Tue 11/1811:20 amSYD - STL
2 stops45h 09mAir Canada
Deal found 10/16$1,222
This Delta deal was found by Cheapflights users on 10/15. 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 10/313:55 pmMCI - SYD
1 stop23h 35mDelta
Fri 11/710:40 amSYD - MCI
1 stop21h 06mDelta
Deal found 10/15$1,229
This Delta deal was found by Cheapflights users on 10/13. 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.
Sat 11/13:55 pmMCI - SYD
1 stop23h 35mDelta
Wed 11/510:40 amSYD - MCI
1 stop21h 06mDelta
Deal found 10/13$1,231
This Delta deal was found by Cheapflights users on 10/14. 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 11/285:50 amMCI - SYD
2 stops33h 40mDelta
Fri 12/510:40 amSYD - MCI
2 stops27h 33mDelta
Deal found 10/14$1,233
This oojo deal was found by Cheapflights users on 10/16. 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.
Wed 11/57:00 amSTL - SYD
2 stops33h 50mQantas Airways
Sun 11/232:05 pmSYD - STL
1 stop19h 27mQantas Airways
Deal found 10/16$1,269
This oojo deal was found by Cheapflights users on 10/14. 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.
Wed 11/123:04 pmMCI - SYD
2 stops38h 21mQantas Airways
Wed 11/262:05 pmSYD - MCI
1 stop22h 06mQantas Airways
Deal found 10/14$1,274
This Qantas Airways deal was found by Cheapflights users on 10/14. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/95:35 pmMCI - SYD
1 stop20h 20mQantas Airways
Sun 11/232:05 pmSYD - MCI
1 stop22h 13mQantas Airways
Deal found 10/14$1,275
This Delta deal was found by Cheapflights users on 10/14. 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.
Thu 11/63:42 pmMCI - SYD
1 stop23h 48mDelta
Sun 11/2310:40 amSYD - MCI
1 stop21h 15mDelta
Deal found 10/14$1,276
This American Airlines deal was found by Cheapflights users on 10/15. 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 11/57:00 amSTL - SYD
1 stop31h 25mAmerican Airlines
Sun 11/232:05 pmSYD - STL
1 stop19h 27mAmerican Airlines
Deal found 10/15$1,276
This American Airlines deal was found by Cheapflights users on 10/14. 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.
Sun 11/92:54 pmMCI - SYD
2 stops25h 06mAmerican Airlines
Sun 11/2311:20 amSYD - MCI
2 stops22h 36mAmerican Airlines
Deal found 10/14$1,299
This American Airlines deal was found by Cheapflights users on 10/16. 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 10/298:49 amSTL - SYD
1 stop30h 06mAmerican Airlines
Sat 11/155:45 pmSYD - STL
1 stop22h 57mAmerican Airlines
Deal found 10/16$1,325
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/287:00 amSTL - SYD
1 stop31h 25mAmerican Airlines
Sun 12/1411:20 amSYD - STL
1 stop29h 37mAmerican Airlines
Deal found 10/16$1,335

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 October 16, 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

Sat 11/1

3:55 pm-7:30 am

1 stop23h 35m

Sydney Kingsford Smith

Wed 11/5

10:40 am-2:46 pm

1 stop21h 06m

$1,231

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 11/28

5:50 am-8:30 am

2 stops33h 40m

Sydney Kingsford Smith

Fri 12/5

10:40 am-9:13 pm

2 stops27h 33m

$1,233

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 10/31

5:55 am-7:30 am

2 stops33h 35m

Sydney Kingsford Smith

Fri 11/7

10:40 am-5:20 pm

2 stops23h 40m

$1,234

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Thu 11/13

3:50 pm-8:30 am

1 stop23h 40m

Sydney Kingsford Smith

Thu 11/20

10:40 am-11:50 pm

2 stops30h 10m

$1,234

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 11/28

7:00 am-9:50 am

2 stops33h 50m

Sydney Kingsford Smith

Sun 12/14

2:05 pm-7:27 pm

1 stop22h 22m

$1,270

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 11/12

7:00 am-10:55 am

2 stops34h 55m

Sydney Kingsford Smith

Sun 11/23

2:05 pm-4:32 pm

1 stop19h 27m

$1,270

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sun 11/9

5:35 pm-6:55 am

1 stop20h 20m

Sydney Kingsford Smith

Sun 11/23

2:05 pm-7:18 pm

1 stop22h 13m

$1,275

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Wed 11/12

3:04 pm-6:55 am

1 stop22h 51m

Sydney Kingsford Smith

Wed 11/26

2:05 pm-4:43 pm

1 stop19h 38m

$1,275

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Sat 11/15

6:28 am-8:30 am

2 stops33h 02m

Sydney Kingsford Smith

Wed 11/26

10:40 am-10:35 pm

2 stops28h 55m

$1,276

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Fri 11/7

10:27 am-8:30 am

2 stops29h 03m

Sydney Kingsford Smith

Sun 11/23

10:40 am-2:55 pm

1 stop21h 15m

$1,276

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 35 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, October is the cheapest month in which you can book a flight from Missouri to Sydney (average of $560). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,240). 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 October 16, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 9% on flights from Missouri to Sydney by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Missouri to Sydney?

Use this chart to determine the cheapest time to fly round-trip from Missouri to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Missouri to Sydney flight should consider departing on Wednesday at noon when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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.

  • How long is the flight from Missouri to Sydney?

    For as low as $1,231, Delta can have you in Sydney from Missouri in 23h 35m. The distance from Missouri to Sydney is about 8839 mi. This flight may include one or multiple stops.

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

    To fly one-way, consider booking your trip with Fiji Airways, which is currently one of the cheapest options available, starting at $679. American Airlines flights start at $779 while deals on Qantas Airways start at $824 one-way.

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

    The most popular route from Missouri to Sydney is Kansas City - Sydney Kingsford Smith. You may also consider Lambert-St Louis - 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, October is the cheapest month in which you can book a flight from Missouri to Sydney (average of $560). Flying from Missouri to Sydney in July is currently the most expensive (average of $1,240). 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 Sydney?

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

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Top 6 airlines flying from Missouri to Sydney

Discover the top 6 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,310FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$897Average$1,202FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$1,044Average$1,569FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$1,130Average$1,518FlexibilityNo cancel feeOn-time74%
Fiji AirwaysCheapest$1,132Average$1,222FlexibilityNo cancel feeOn-time74%
DeltaCheapest$1,211Average$1,440FlexibilityNo cancel feeOn-timeN/A

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