What is the cheapest airline that flies from Sydney Kingsford Smith to Lambert-St Louis?

American Airlines, United Airlines, and Air Canada are the most popular carriers operating from Sydney Kingsford Smith to Lambert-St Louis

Which airlines fly to St. Louis?

Qantas Airways, United Airlines and American Airlines are the top three most popular airlines that fly to St. Louis from Sydney according to our data. Qantas Airways is the first choice among our users, with 41% 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.

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 August 2026, 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.

$1,008 Cheap Flights from Sydney to St. Louis in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Sydney to St. Louis

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One-way

Cheap return flights

Enter your travel dates to find the best prices.

11:15 - 23:45SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 30m1 stop Los Angeles Los Angeles

08:29 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

29h 26m1 stop Dallas/Fort Worth

$1,369American Airlines

Tue, 17 Nov - Tue, 1 Dec

11:15 - 23:45SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 30m1 stop Los Angeles Los Angeles

13:20 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 35m2 stops Chicago O'Hare Intl Dallas/Fort Worth

$1,400American Airlines

Tue, 17 Nov - Tue, 1 Dec

10:10 - 13:44SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 34m2 stops Los Angeles Los Angeles Phoenix Sky Harbor Intl

15:20 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 35m1 stop Dallas/Fort Worth

$1,503American Airlines

Wed, 21 Oct - Sat, 24 Oct

11:50 - 16:57SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 07m2 stops San Francisco Denver Intl

13:15 - 09:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 50m3 stops Chicago O'Hare Intl Houston George Bush Intcntl Los Angeles Los Angeles

$1,746United Airlines

Tue, 17 Nov - Tue, 1 Dec

18:50 - 23:46SYD Sydney Kingsford Smith-STL Lambert-St Louis

20h 56m1 stop Los Angeles Los Angeles

06:04 - 07:30STL Lambert-St Louis-SYD Sydney Kingsford Smith

33h 26m1 stop Los Angeles Los Angeles

$1,796Qantas Airways

Thu, 8 Oct - Thu, 15 Oct

11:20 - 16:37SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 17m2 stops San Francisco Denver Intl

13:08 - 09:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 12m2 stops Chicago O'Hare Intl San Francisco

$1,796United Airlines

Tue, 13 Oct - Thu, 5 Nov

10:30 - 16:37SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 07m2 stops Los Angeles Los Angeles Denver Intl

13:08 - 09:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 57m3 stops Chicago O'Hare Intl Houston George Bush Intcntl Los Angeles Los Angeles

$1,796United Airlines

Tue, 13 Oct - Thu, 5 Nov

09:55 - 23:44SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 49m3 stops Auckland Intl San Francisco Denver Intl

07:30 - 10:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m3 stops Chicago O'Hare Intl San Francisco Auckland Intl

$2,121Multiple Airlines

Tue, 13 Oct - Thu, 5 Nov

06:25 - 18:43SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 18m3 stops Melbourne Los Angeles Los Angeles San Francisco

14:27 - 08:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 38m2 stops Phoenix Sky Harbor Intl Los Angeles Los Angeles

$2,305Multiple Airlines

Thu, 8 Oct - Thu, 15 Oct

10:10 - 23:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 20m1 stop Los Angeles Los Angeles

06:04 - 10:30STL Lambert-St Louis-SYD Sydney Kingsford Smith

36h 26m2 stops Los Angeles Los Angeles Melbourne

$2,373Qantas Airways

Sun, 4 Oct - Sun, 11 Oct

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American Airlines flights from Sydney to St. Louis

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

American Airlines

17 Nov

SYD11:15Sydney Kingsford Smith

29h 30m

1 stop

STL23:45Lambert-St Louis

1 Dec

STL08:29Lambert-St Louis

29h 26m

1 stop

SYD06:55Sydney Kingsford Smith

$1,369

American Airlines

17 Nov

SYD11:15Sydney Kingsford Smith

29h 30m

1 stop

STL23:45Lambert-St Louis

1 Dec

STL13:20Lambert-St Louis

24h 35m

2 stops

SYD06:55Sydney Kingsford Smith

$1,400

American Airlines

21 Oct

SYD10:10Sydney Kingsford Smith

43h 34m

2 stops

STL13:44Lambert-St Louis

24 Oct

STL15:20Lambert-St Louis

23h 35m

1 stop

SYD06:55Sydney Kingsford Smith

$1,503

United Airlines flights from Sydney to St. Louis

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

United Airlines

17 Nov

SYD11:50Sydney Kingsford Smith

22h 07m

2 stops

STL16:57Lambert-St Louis

1 Dec

STL13:15Lambert-St Louis

26h 50m

3 stops

SYD09:05Sydney Kingsford Smith

$1,746

United Airlines

13 Oct

SYD10:30Sydney Kingsford Smith

22h 07m

2 stops

STL16:37Lambert-St Louis

5 Nov

STL13:08Lambert-St Louis

26h 57m

3 stops

SYD09:05Sydney Kingsford Smith

$1,796

United Airlines

4 Oct

SYD11:20Sydney Kingsford Smith

23h 23m

1 stop

STL18:43Lambert-St Louis

11 Oct

STL09:00Lambert-St Louis

31h 00m

2 stops

SYD08:00Sydney Kingsford Smith

$2,215

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:15-23:45

1 stop29h 30m

Lambert-St Louis

Tue 1/12

08:29-06:55

1 stop29h 26m

$1,369

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:15-23:45

1 stop29h 30m

Lambert-St Louis

Tue 1/12

13:20-06:55

2 stops24h 35m

$1,400

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

10:10-13:44

2 stops43h 34m

Lambert-St Louis

Sat 24/10

15:20-06:55

1 stop23h 35m

$1,503

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:50-16:57

2 stops22h 07m

Lambert-St Louis

Tue 1/12

13:15-09:05

3 stops26h 50m

$1,746

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Thu 8/10

18:50-23:46

1 stop20h 56m

Lambert-St Louis

Thu 15/10

06:04-07:30

1 stop33h 26m

$1,796

Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 13/10

11:20-16:37

2 stops21h 17m

Lambert-St Louis

Thu 5/11

13:08-09:20

2 stops27h 12m

$1,796

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 13/10

10:30-16:37

2 stops22h 07m

Lambert-St Louis

Thu 5/11

13:08-09:05

3 stops26h 57m

$1,796

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 13/10

09:55-23:44

3 stops29h 49m

Lambert-St Louis

Thu 5/11

07:30-10:35

3 stops34h 05m

$2,121

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Thu 8/10

06:25-18:43

3 stops28h 18m

Lambert-St Louis

Thu 15/10

14:27-08:05

2 stops25h 38m

$2,305

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sun 4/10

10:10-23:30

1 stop29h 20m

Lambert-St Louis

Sun 11/10

06:04-10:30

2 stops36h 26m

$2,373

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted 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

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

Prices are currently typical for flights on this route.

Typical prices usually range from $1,338 to $1,684.
The lowest price recently found on this route was $1,369.

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

The month of September is, on average, the cheapest month to fly to St. Louis from Sydney, with most prices found around $1,449. If you aren’t able to travel to St. Louis during the month of September, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $1,478.

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

You could potentially save up to 1% 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

Best price found	$1,008
Fastest flight time	38h 40m
Direct flights	None

The best one-way flight to St. Louis from Sydney in the past 72 hours is $1,008. The best return flight deal from Sydney to St. Louis found on momondo in the last 72 hours is $1,369.

The fastest flight from Sydney to St. Louis takes 38h 40m

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

Search flight deals

Frequently asked questions about flying from Sydney to St. Louis

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 38h 40m.
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 August 2026, 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 Qantas Airways, representing 41% of all bookings. The subsequent popular airlines are United Airlines at 32% and American Airlines at 27%.

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 $1,165	Free cancellation	Rating 7.4 10,117 reviews	Search United Airlines flights
American Airlines	PriceFrom $1,451	Free cancellation	Rating 7.1 11,987 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $1,478	Free cancellation	Rating 7.5 1,085 reviews	Search Qantas Airways flights

Collinsville

St. Charles

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

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Cheap flights from Sydney to St. Louis from $1,008

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sydney to St. Louis departing on 2/11. 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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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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How to get the cheapest flight ticket from Sydney to St. Louis

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?

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

What is the cheapest airline that flies from Sydney Kingsford Smith to Lambert-St Louis?

Which airlines fly to St. Louis?

When to book flights from Sydney to St. Louis

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

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying 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?

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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