What is the cheapest airline that flies from Missouri to Sydney Kingsford Smith?

Qantas Airways, American Airlines, and Air Canada are the most popular carriers operating from Missouri to Sydney Kingsford Smith

What airlines fly to Sydney?

United Airlines, Qantas Airways and Delta are the top three most popular airlines that fly to Sydney from Missouri according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 6 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Sydney?

Flight times from Missouri to Sydney vary, but if you’re flying out of Kansas City and flying into Sydney (one of the most popular routes), then the duration is 20h 42m on average. Another popular route from Missouri to Sydney is flying from St. Louis to Sydney, which will take roughly 25h 10m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from Missouri to Sydney Kingsford Smith Airport?

Prices for flights from Missouri to Sydney Kingsford Smith Airport are updated daily.

How many operators does momondo search for flights from Missouri to Sydney Kingsford Smith Airport?

As of December 2025, there are 6 operators available to choose from for flights from Missouri to Sydney Kingsford Smith Airport.

How old do you have to be to fly from Missouri to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$562 Cheap Flights from Missouri to Sydney in 2025/26

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7:04 am - 7:35 am

STL

SYD

55h 31m2 stops

11:20 am - 11:59 pm

SYD

STL

29h 39m1 stop

$939Qantas Airways

Sat, Jan 31 - Sat, Feb 7

7:04 am - 7:35 am

STL

SYD

55h 31m2 stops

5:45 pm - 11:48 pm

SYD

STL

23h 03m1 stop

$946Qantas Airways

Sat, Feb 7 - Sat, Feb 21

6:30 am - 8:50 pm

STL

SYD

45h 20m2 stops

5:45 pm - 11:48 pm

SYD

STL

23h 03m1 stop

$991Qantas Airways

Thu, Feb 19 - Sun, Mar 1

4:05 pm - 9:35 am

STL

SYD

48h 30m2 stops

11:20 am - 3:29 pm

SYD

STL

45h 09m2 stops

$1,010Air Canada

Sat, Jan 31 - Sat, Feb 7

2:50 pm - 7:20 am

STL

SYD

25h 30m2 stops

9:20 am - 3:24 pm

SYD

STL

45h 04m2 stops

$1,029Multiple Airlines

Mon, Apr 6 - Sun, Apr 19

4:05 pm - 7:20 am

STL

SYD

48h 15m2 stops

9:20 am - 3:24 pm

SYD

STL

45h 04m2 stops

$1,031Air Canada

Sun, Apr 5 - Sun, Apr 19

1:00 pm - 7:20 am

STL

SYD

27h 20m2 stops

9:20 am - 5:53 pm

SYD

STL

23h 33m2 stops

$1,078Multiple Airlines

Sun, May 10 - Thu, May 21

1:56 pm - 6:55 am

MCI

SYD

23h 59m1 stop

11:20 am - 4:47 pm

SYD

MCI

22h 27m2 stops

$1,139American Airlines

Mon, Jan 26 - Sun, Feb 8

1:56 pm - 6:55 am

MCI

SYD

23h 59m1 stop

2:05 pm - 4:47 pm

SYD

MCI

19h 42m1 stop

$1,140American Airlines

Mon, Jan 26 - Sun, Feb 8

11:15 am - 7:00 am

COU

SYD

26h 45m2 stops

12:10 pm - 8:40 pm

SYD

COU

25h 30m2 stops

$2,169United Airlines

Fri, Feb 20 - Tue, Feb 24

Qantas Airways flights from Missouri to Sydney

Our best Qantas Airways deals on Missouri to Sydney flight tickets

Qantas Airways

Jan 31

STL7:04 amLambert-St Louis

55h 31m

2 stops

SYD7:35 amSydney Kingsford Smith

Feb 7

SYD11:20 amSydney Kingsford Smith

29h 39m

1 stop

STL11:59 pmLambert-St Louis

$939

Find similar

Qantas Airways

Feb 7

STL7:04 amLambert-St Louis

55h 31m

2 stops

SYD7:35 amSydney Kingsford Smith

Feb 21

SYD5:45 pmSydney Kingsford Smith

23h 03m

1 stop

STL11:48 pmLambert-St Louis

$946

Find similar

Qantas Airways

Feb 19

STL6:30 amLambert-St Louis

45h 20m

2 stops

SYD8:50 pmSydney Kingsford Smith

Mar 1

SYD5:45 pmSydney Kingsford Smith

23h 03m

1 stop

STL11:48 pmLambert-St Louis

$991

Find similar

Air Canada flights from Missouri to Sydney

Our best Air Canada deals on Missouri to Sydney flight tickets

Air Canada

Jan 31

STL4:05 pmLambert-St Louis

48h 30m

2 stops

SYD9:35 amSydney Kingsford Smith

Feb 7

SYD11:20 amSydney Kingsford Smith

45h 09m

2 stops

STL3:29 pmLambert-St Louis

$1,010

Find similar

Air Canada

Apr 5

STL4:05 pmLambert-St Louis

48h 15m

2 stops

SYD7:20 amSydney Kingsford Smith

Apr 19

SYD9:20 amSydney Kingsford Smith

45h 04m

2 stops

STL3:24 pmLambert-St Louis

$1,031

Find similar

Air Canada

Feb 2

MCI1:42 pmKansas City

26h 53m

2 stops

SYD9:35 amSydney Kingsford Smith

Feb 8

SYD11:20 amSydney Kingsford Smith

21h 48m

2 stops

MCI4:08 pmKansas City

$1,032

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 1/31

7:04 am-7:35 am

2 stops55h 31m

Sydney Kingsford Smith

Sat 2/7

11:20 am-11:59 pm

1 stop29h 39m

$939

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 2/7

7:04 am-7:35 am

2 stops55h 31m

Sydney Kingsford Smith

Sat 2/21

5:45 pm-11:48 pm

1 stop23h 03m

$946

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 2/19

6:30 am-8:50 pm

2 stops45h 20m

Sydney Kingsford Smith

Sun 3/1

5:45 pm-11:48 pm

1 stop23h 03m

$991

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 1/31

4:05 pm-9:35 am

2 stops48h 30m

Sydney Kingsford Smith

Sat 2/7

11:20 am-3:29 pm

2 stops45h 09m

$1,010

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/6

2:50 pm-7:20 am

2 stops25h 30m

Sydney Kingsford Smith

Sun 4/19

9:20 am-3:24 pm

2 stops45h 04m

$1,029

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 4/5

4:05 pm-7:20 am

2 stops48h 15m

Sydney Kingsford Smith

Sun 4/19

9:20 am-3:24 pm

2 stops45h 04m

$1,031

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 5/10

1:00 pm-7:20 am

2 stops27h 20m

Sydney Kingsford Smith

Thu 5/21

9:20 am-5:53 pm

2 stops23h 33m

$1,078

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 1/26

1:56 pm-6:55 am

1 stop23h 59m

Sydney Kingsford Smith

Sun 2/8

11:20 am-4:47 pm

2 stops22h 27m

$1,139

Kansas CitySydney

MCI - SYD

MCISYD

Kansas City

Mon 1/26

1:56 pm-6:55 am

1 stop23h 59m

Sydney Kingsford Smith

Sun 2/8

2:05 pm-4:47 pm

1 stop19h 42m

$1,140

ColumbiaSydney

COU - SYD

COUSYD

Columbia Regional

Fri 2/20

11:15 am-7:00 am

2 stops26h 45m

Sydney Kingsford Smith

Tue 2/24

12:10 pm-8:40 pm

2 stops25h 30m

$2,169

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Missouri to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Sydney?

In general, August is the cheapest month to fly from Missouri to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,275. If you are unable to visit Sydney during the month of August, then departing from Missouri during the month October is also very affordable. Most momondo users find prices during this month for around $1,331.

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from Missouri to Sydney is on a Wednesday when prices can be found for as low as $1,392. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,518.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the evening. momondo users have found flights departing from Missouri to Sydney in the evening for as low as $1,440. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly at noon, with an average ticket price of $1,882. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,453 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Missouri for as low as $948 on momondo.

Can stopping save me money on Missouri to Sydney flights?

You could potentially save up to 8% on your flight if you consider stops on a Missouri to Sydney flight.

Cheap Missouri to Sydney flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Sydney

Fastest flight time	20h 42m
Direct flights	None

The fastest flight from Missouri to Sydney takes 20h 42m

There are no direct flights from Missouri to Sydney. There are no popular flight routes from Missouri to Sydney.

Search flight deals

When did momondo last update prices for flights from Missouri to Sydney Kingsford Smith Airport?
Prices for flights from Missouri to Sydney Kingsford Smith Airport are updated daily.
How many operators does momondo search for flights from Missouri to Sydney Kingsford Smith Airport?
As of December 2025, there are 6 operators available to choose from for flights from Missouri to Sydney Kingsford Smith Airport.
How old do you have to be to fly from Missouri to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Missouri to Sydney

Compare and see reviews for airlines that fly from Missouri to Sydney with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $822	Free Cancellation	Rating 7.4 9,091 reviews	Search United Airlines flights
Air Canada	PriceFrom $897	Free Cancellation	Rating 7.1 10,534 reviews	Search Air Canada flights
American Airlines	PriceFrom $1,044	Free Cancellation	Rating 7.2 11,054 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $1,130	Free Cancellation	Rating 7.5 947 reviews	Search Qantas Airways flights
Fiji Airways	PriceFrom $1,132	Free Cancellation	Rating 8.1 210 reviews	Search Fiji Airways flights
Delta	PriceFrom $1,160	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights

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Wollongong

Randwick

Coogee

Manly

Penrith

Cronulla

Lithgow

Leura

Charlestown

Terrigal

Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Missouri to Sydney?

Finding the right flight to Sydney from Missouri is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

Can I find flights from Missouri to Sydney with flexible booking policies on momondo?

Flights from Missouri to Sydney with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Missouri to Sydney?

Once you have performed a search for Missouri to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Missouri to Sydney right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from Missouri and alert you when they change.

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Missouri to Sydney from $562

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Sydney departing on 2/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Missouri to Sydney

What is the cheapest month to fly to Sydney?

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from Missouri to Sydney is on a Wednesday when prices can be found for as low as $1,392. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,518.

What is the cheapest time of day to depart on your flight to Sydney?

How far in advance should I book a flight to Sydney?

Can stopping save me money on Missouri to Sydney flights?

You could potentially save up to 8% on your flight if you consider stops on a Missouri to Sydney flight.

What is the cheapest airline that flies from Missouri to Sydney Kingsford Smith?

Qantas Airways, American Airlines, and Air Canada are the most popular carriers operating from Missouri to Sydney Kingsford Smith

What airlines fly to Sydney?

How long does it take to fly to Sydney?

Cheap Missouri to Sydney flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Sydney

Fastest flight time

Direct flights

When did momondo last update prices for flights from Missouri to Sydney Kingsford Smith Airport?

How many operators does momondo search for flights from Missouri to Sydney Kingsford Smith Airport?

How old do you have to be to fly from Missouri to Sydney Kingsford Smith Airport?

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

Best airlines flying from Missouri to Sydney

Compare and see reviews for airlines that fly from Missouri to Sydney with momondo

Traveling to a place near Sydney?

Why use momondo?

Why should I use momondo to find a flight deal from Missouri to Sydney?

Can I find flights from Missouri to Sydney with flexible booking policies on momondo?

How can momondo help me find flights from Missouri to Sydney?

I’m not ready to book a flight from Missouri to Sydney right now. Can momondo alert me if prices change?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing New South Wales