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Cheap flights from Sydney to St. Louis from $696

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 8/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Sydney to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:05 am - 4:11 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
49h 06m3 stops Nadi Los Angeles Orlando
Multiple Airlines Logo
12:17 pm - 11:50 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
32h 33m3 stops Las Vegas Harry Reid Intl Los Angeles Nadi
$975Multiple Airlines
Wed, Sep 2 - Wed, Sep 23
American Airlines Logo
11:20 am - 11:59 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 39m1 stop Los Angeles
American Airlines Logo
2:54 pm - 6:00 pmSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 06m2 stops Dallas/Fort Worth Brisbane
$1,138American Airlines
Tue, Jan 26 - Sat, Jan 30
American Airlines Logo
11:20 am - 11:59 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 39m1 stop Los Angeles
American Airlines Logo
2:54 pm - 6:00 pmSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 06m2 stops Dallas/Fort Worth Brisbane
$1,139American Airlines
Tue, Jan 26 - Sat, Jan 30
American Airlines Logo
11:20 am - 11:59 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 39m1 stop Los Angeles
American Airlines Logo
2:54 pm - 6:00 pmSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 06m2 stops Dallas/Fort Worth Brisbane
$1,141American Airlines
Tue, Jan 26 - Sat, Jan 30
American Airlines Logo
11:20 am - 6:15 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 55m2 stops Los Angeles Dallas/Fort Worth
American Airlines Logo
6:02 am - 9:00 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
33h 58m1 stop Los Angeles
$1,178American Airlines
Mon, Nov 2 - Tue, Nov 17
American Airlines Logo
2:05 pm - 8:19 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 14m1 stop Dallas/Fort Worth
American Airlines Logo
6:02 am - 9:00 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
33h 58m1 stop Los Angeles
$1,186American Airlines
Mon, Nov 2 - Mon, Nov 16
Qantas Airways Logo
2:05 pm - 5:54 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
20h 49m1 stop Dallas/Fort Worth
Qantas Airways Logo
2:54 pm - 6:55 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
23h 01m1 stop Dallas/Fort Worth
$1,195Qantas Airways
Tue, Nov 17 - Tue, Dec 1
American Airlines Logo
11:20 am - 6:15 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 55m2 stops Los Angeles Dallas/Fort Worth
American Airlines Logo
11:32 am - 9:00 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
28h 28m2 stops Chicago O'Hare Intl Los Angeles
$1,214American Airlines
Thu, Nov 19 - Tue, Dec 1
American Airlines Logo
11:20 am - 8:19 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
25h 59m2 stops Los Angeles Dallas/Fort Worth
American Airlines Logo
12:58 pm - 6:55 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
24h 57m1 stop Dallas/Fort Worth
$1,222American Airlines
Mon, Nov 16 - Sun, Nov 29
American Airlines Logo
11:20 am - 5:54 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 34m2 stops Los Angeles Dallas/Fort Worth
American Airlines Logo
2:54 pm - 9:00 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
25h 06m2 stops Dallas/Fort Worth Los Angeles
$1,227American Airlines
Tue, Nov 17 - Tue, Dec 1

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Air New Zealand flights from Sydney to St. Louis

Our best Air New Zealand deals on Sydney to St. Louis flight tickets
Air New Zealand
Sep 14
SYD7:50 amSydney Kingsford Smith
29h 40m
2 stops
STL10:30 pmLambert-St Louis
Sep 20
STL8:36 amLambert-St Louis
35h 04m
2 stops
SYD10:40 amSydney Kingsford Smith
$1,373
Air New Zealand
Sep 2
SYD9:55 amSydney Kingsford Smith
27h 32m
2 stops
STL10:27 pmLambert-St Louis
Sep 23
STL8:35 amLambert-St Louis
33h 10m
2 stops
SYD8:45 amSydney Kingsford Smith
$1,678

American Airlines flights from Sydney to St. Louis

Our best American Airlines deals on Sydney to St. Louis flight tickets
American Airlines
Jan 26
SYD11:20 amSydney Kingsford Smith
29h 39m
1 stop
STL11:59 pmLambert-St Louis
Jan 30
STL2:54 pmLambert-St Louis
34h 06m
2 stops
SYD6:00 pmSydney Kingsford Smith
$1,138
American Airlines
Jan 26
SYD11:20 amSydney Kingsford Smith
29h 39m
1 stop
STL11:59 pmLambert-St Louis
Jan 30
STL2:54 pmLambert-St Louis
34h 06m
2 stops
SYD6:00 pmSydney Kingsford Smith
$1,139
American Airlines
Jan 26
SYD11:20 amSydney Kingsford Smith
29h 39m
1 stop
STL11:59 pmLambert-St Louis
Jan 30
STL2:54 pmLambert-St Louis
34h 06m
2 stops
SYD6:00 pmSydney Kingsford Smith
$1,141

momondo Fare Finder

 
Customize your flight search to find flights from Sydney to St. Louis 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, momondo users made 832,500 searches. Data last updated August 15, 2026.
Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 9/2

6:05 am-4:11 pm

3 stops49h 06m

Lambert-St Louis

Wed 9/23

12:17 pm-11:50 am

3 stops32h 33m

$975

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 1/26

11:20 am-11:59 pm

1 stop29h 39m

Lambert-St Louis

Sat 1/30

2:54 pm-6:00 pm

2 stops34h 06m

$1,138

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 1/26

11:20 am-11:59 pm

1 stop29h 39m

Lambert-St Louis

Sat 1/30

2:54 pm-6:00 pm

2 stops34h 06m

$1,139

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 1/26

11:20 am-11:59 pm

1 stop29h 39m

Lambert-St Louis

Sat 1/30

2:54 pm-6:00 pm

2 stops34h 06m

$1,141

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 11/2

11:20 am-6:15 pm

2 stops23h 55m

Lambert-St Louis

Tue 11/17

6:02 am-9:00 am

1 stop33h 58m

$1,178

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 11/2

2:05 pm-8:19 pm

1 stop23h 14m

Lambert-St Louis

Mon 11/16

6:02 am-9:00 am

1 stop33h 58m

$1,186
Quickest round-trip

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 11/17

2:05 pm-5:54 pm

1 stop20h 49m

Lambert-St Louis

Tue 12/1

2:54 pm-6:55 am

1 stop23h 01m

$1,195

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Thu 11/19

11:20 am-6:15 pm

2 stops23h 55m

Lambert-St Louis

Tue 12/1

11:32 am-9:00 am

2 stops28h 28m

$1,214

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 11/16

11:20 am-8:19 pm

2 stops25h 59m

Lambert-St Louis

Sun 11/29

12:58 pm-6:55 am

1 stop24h 57m

$1,222

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 11/17

11:20 am-5:54 pm

2 stops23h 34m

Lambert-St Louis

Tue 12/1

2:54 pm-9:00 am

2 stops25h 06m

$1,227

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

Prices are currently low for flights on this route.

Typical prices usually range from $1,063 to $1,086.
The lowest price recently found on this route was $975.

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

In general, September is the cheapest month to fly from Sydney to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,039. The month of July is another great option to travel to St. Louis, with average flight prices from Sydney averaging around $1,060.

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

You could potentially save up to 69% 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 round-trip 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

Fastest flight time

21h 10m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 21h 10m
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?

    A flight from Sydney Kingsford Smith to Lambert-St Louis will travel around 9057.2 mi. Typically, this will take 21h 10m by plane in normal conditions.

  • 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 are updated daily.

  • 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 layovers 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 required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Collinsville
Florissant
Alton
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Sydney to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Sydney with this policy.

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

Once all potential Sydney to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Sydney to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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