Which airport is the most popular for stopovers for flights between Sydney and St. Louis?

Los Angeles (LAX) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from Sydney to St. Louis?

Flights via Los Angeles (LAX) offer the lowest average return price of $2,103.

Which airlines fly to St. Louis?

United Airlines, Air Canada and Qantas Airways are the top three most popular airlines that fly to St. Louis from Sydney according to our data. United Airlines is the first choice among our users, with 66% of people opting to fly with this airline when travelling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

Which stopover airport has the shortest travel time from Sydney to St. Louis?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 19h 47m.

Which stopover airport has the shortest connection time from Sydney to St. Louis?

Los Angeles (LAX) has the shortest average stopover time for this route: 2h 12m.

When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?

Prices for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport refresh daily.

How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?

As of September 2025, there are 3 operators available to choose from for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport.

How old do you have to be to fly from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Sydney Kingsford Smith Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$1,213 Cheap Flights from Sydney to St. Louis in 2025

Q: What is the typical price of a round-trip flight between Sydney and St. Louis?

Prices are currently low for flights on this route. Typical prices usually range from $1,879 to $2,088. The lowest price recently found on this route was $1,213.

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Find the cheapest flights from Sydney to St. Louis

Round-trip

One-way

Cheap return flights

10:20 - 15:29SYD-STL

45h 09m2 stops

16:05 - 08:35STL-SYD

48h 30m2 stops

$1,213Air Canada

Find Deal

Thu, 12 Mar - Mon, 16 Mar

10:20 - 15:29SYD-STL

45h 09m2 stops

16:05 - 08:35STL-SYD

48h 30m2 stops

$1,216Air Canada

Find Deal

Thu, 12 Mar - Mon, 16 Mar

11:20 - 23:51SYD-STL

29h 31m2 stops

06:55 - 09:00STL-SYD

33h 05m1 stop

$1,249American Airlines

Find Deal

Tue, 25 Nov - Mon, 8 Dec

11:20 - 23:42SYD-STL

29h 22m1 stop

16:01 - 09:00STL-SYD

23h 59m2 stops

$1,252American Airlines

Find Deal

Tue, 2 Dec - Tue, 9 Dec

16:00 - 12:39SYD-STL

61h 39m2 stops

16:05 - 09:35STL-SYD

48h 30m2 stops

$1,257Air Canada

Find Deal

Thu, 4 Dec - Mon, 8 Dec

11:50 - 18:47SYD-STL

23h 57m1 stop

16:45 - 07:00STL-SYD

21h 15m1 stop

$1,275United Airlines

Find Deal

Mon, 24 Nov - Sat, 6 Dec

10:40 - 23:23SYD-STL

29h 43m2 stops

19:56 - 08:30STL-SYD

43h 34m2 stops

$1,276Delta

Find Deal

Mon, 24 Nov - Wed, 10 Dec

12:10 - 15:40SYD-STL

44h 30m2 stops

16:37 - 09:05STL-SYD

23h 28m2 stops

$1,279United Airlines

Find Deal

Mon, 1 Dec - Tue, 9 Dec

14:05 - 16:40SYD-STL

19h 35m1 stop

13:20 - 06:55STL-SYD

24h 35m1 stop

$1,547Qantas Airways

Find Deal

Tue, 25 Nov - Wed, 10 Dec

14:05 - 16:40SYD-STL

19h 35m1 stop

06:55 - 07:25STL-SYD

31h 30m1 stop

$1,620Qantas Airways

Find Deal

Tue, 25 Nov - Thu, 11 Dec

American Airlines flights from Sydney to St. Louis

Our best American Airlines deals on Sydney to St. Louis flight tickets

American Airlines

25 Nov

SYD11:20Sydney Kingsford Smith

29h 31m

2 stops

STL23:51Lambert-St Louis

8 Dec

STL06:55Lambert-St Louis

33h 05m

1 stop

SYD09:00Sydney Kingsford Smith

$1,249

Find similar

American Airlines

2 Dec

SYD11:20Sydney Kingsford Smith

29h 22m

1 stop

STL23:42Lambert-St Louis

9 Dec

STL16:01Lambert-St Louis

23h 59m

2 stops

SYD09:00Sydney Kingsford Smith

$1,252

Find similar

American Airlines

27 Oct

SYD11:20Sydney Kingsford Smith

23h 02m

2 stops

STL18:22Lambert-St Louis

3 Nov

STL13:20Lambert-St Louis

26h 40m

2 stops

SYD09:00Sydney Kingsford Smith

$1,266

Find similar

United Airlines flights from Sydney to St. Louis

Our best United Airlines deals on Sydney to St. Louis flight tickets

United Airlines

24 Nov

SYD11:50Sydney Kingsford Smith

23h 57m

1 stop

STL18:47Lambert-St Louis

6 Dec

STL16:45Lambert-St Louis

21h 15m

1 stop

SYD07:00Sydney Kingsford Smith

$1,275

Find similar

United Airlines

1 Dec

SYD12:10Sydney Kingsford Smith

44h 30m

2 stops

STL15:40Lambert-St Louis

9 Dec

STL16:37Lambert-St Louis

23h 28m

2 stops

SYD09:05Sydney Kingsford Smith

$1,279

Find similar

United Airlines

12 Mar

SYD12:10Sydney Kingsford Smith

20h 53m

1 stop

STL17:03Lambert-St Louis

16 Mar

STL15:15Lambert-St Louis

23h 45m

2 stops

SYD07:00Sydney Kingsford Smith

$1,435

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,213

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,216

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/11

11:20-23:51

2 stops29h 31m

Lambert-St Louis

Mon 8/12

06:55-09:00

1 stop33h 05m

$1,249

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 2/12

11:20-23:42

1 stop29h 22m

Lambert-St Louis

Tue 9/12

16:01-09:00

2 stops23h 59m

$1,252

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/12

16:00-12:39

2 stops61h 39m

Lambert-St Louis

Mon 8/12

16:05-09:35

2 stops48h 30m

$1,257

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 24/11

11:50-18:47

1 stop23h 57m

Lambert-St Louis

Sat 6/12

16:45-07:00

1 stop21h 15m

$1,275

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 24/11

10:40-23:23

2 stops29h 43m

Lambert-St Louis

Wed 10/12

19:56-08:30

2 stops43h 34m

$1,276

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 1/12

12:10-15:40

2 stops44h 30m

Lambert-St Louis

Tue 9/12

16:37-09:05

2 stops23h 28m

$1,279

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/11

14:05-16:40

1 stop19h 35m

Lambert-St Louis

Wed 10/12

13:20-06:55

1 stop24h 35m

$1,547

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/11

14:05-16:40

1 stop19h 35m

Lambert-St Louis

Thu 11/12

06:55-07:25

1 stop31h 30m

$1,620

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Sydney to St. Louis

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

Stopovers

What is the typical price of a round-trip flight between Sydney and St. Louis?

What is the cheapest month to fly to St. Louis?

The month of November is, on average, the cheapest month to fly to St. Louis from Sydney, with most prices found around $1,426. If you aren’t able to travel to St. Louis during the month of November, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,798.

What is the cheapest day to depart on your flight to St. Louis?

According to our data, Saturday is the cheapest day to fly to St. Louis from Sydney. The lowest ticket price found for a Saturday departure recently was $2,100. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Sydney to St. Louis on a Thursday will generally be more expensive and average around $2,690. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Sydney in the morning is the least expensive time of day to depart. momondo users have found prices as low as $2,150 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $3,122 per ticket.

Can stopping save me money on Sydney to St. Louis flights?

You could potentially save up to 31% on your flight if you consider stops on a Sydney to St. Louis flight.

When to book flights from Sydney to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Sydney to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Sydney to St. Louis (SYD to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sydney to St. Louis

Direct flights	None

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

Search flight deals

How far is Sydney Kingsford Smith to Lambert-St Louis by plane?
Sydney Kingsford Smith and Lambert-St Louis are 14576.1 km apart from one another. By plane, this route typically takes 19h 35m.
When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?
Prices for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?
As of September 2025, there are 3 operators available to choose from for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Sydney Kingsford Smith Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Sydney to St. Louis?
momondo data reveals that the most frequently booked airline on the route from Sydney to St. Louis is United Airlines, representing 66% of all bookings. The subsequent popular airlines are Air Canada at 19% and Qantas Airways at 16%.

Best airlines flying from Sydney to St. Louis

Compare and see reviews for airlines that fly from Sydney to St. Louis with momondo

Airline	Rating	Free cancellation	Price
United Airlines	PriceFrom $1,256	Free cancellation	Rating 7.4 8,934 reviews	Search United Airlines flights
Air Canada	PriceFrom $1,561	Free cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,657	Free cancellation	Rating 7.5 905 reviews	Search Qantas Airways flights

Chesterfield

Why use momondo?

Why should I use momondo to find a flight deal from Sydney to St. Louis?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Sydney.

Can I find flights from Sydney to St. Louis with flexible booking policies on momondo?

Flights from Sydney to St. Louis 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 Sydney to St. Louis?

Once you have performed a search for Sydney to St. Louis 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 Sydney to St. Louis right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to St. Louis from Sydney. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organise 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 Sydney to St. Louis from $1,213

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Sydney to St. Louis departing on 12/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from Sydney to St. Louis

Cheap return flights

Cheap one-way flights

American Airlines flights from Sydney to St. Louis

Our best American Airlines deals on Sydney to St. Louis flight tickets

United Airlines flights from Sydney to St. Louis

Our best United Airlines deals on Sydney to St. Louis flight tickets

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Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

See travel insights to St. Louis from

How to get the cheapest flight ticket from Sydney to St. Louis

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

What is the typical price of a round-trip flight between Sydney and St. Louis?

What is the cheapest month to fly to St. Louis?

What is the cheapest day to depart on your flight to St. Louis?

What is the cheapest time of day to depart on your flight to St. Louis?

Can stopping save me money on Sydney to St. Louis flights?

You could potentially save up to 31% on your flight if you consider stops on a Sydney to St. Louis flight.

Which airlines fly to St. Louis?

Which airport is the most popular for stopovers for flights between Sydney and St. Louis?

Los Angeles (LAX) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from Sydney to St. Louis?

Flights via Los Angeles (LAX) offer the lowest average return price of $2,103.

Which stopover airport has the shortest travel time from Sydney to St. Louis?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 19h 47m.

Which stopover airport has the shortest connection time from Sydney to St. Louis?

Los Angeles (LAX) has the shortest average stopover time for this route: 2h 12m.

When to book flights from Sydney to St. Louis

Cheap Sydney to St. Louis (SYD to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sydney to St. Louis

Direct flights

How far is Sydney Kingsford Smith to Lambert-St Louis by plane?

When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?

How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?

How old do you have to be to fly from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?

What documentation or ID do you need to fly to Lambert-St Louis Airport?

What is the most popular airline from Sydney to St. Louis?

Best airlines flying from Sydney to St. Louis

Compare and see reviews for airlines that fly from Sydney to St. Louis with momondo

Travelling to a place near St. Louis?

Why use momondo?

Why should I use momondo to find a flight deal from Sydney to St. Louis?

Can I find flights from Sydney to St. Louis with flexible booking policies on momondo?

How can momondo help me find flights from Sydney to St. Louis?

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

An easier way to manage your St. Louis trip

We make it super easy to schedule, organise 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 the United States

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