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Cheap flights from Sydney to St. Louis from $609

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 2/22. 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
0 bags

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Find the cheapest flights from Sydney to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
9:20 am - 8:04 pm
SYD
-
STL
49h 44m
2 stops
Air Canada Logo
7:30 am - 7:20 am
STL
-
SYD
32h 50m
2 stops
$881Air Canada
Thu, May 14 - Thu, Jun 4
Air Canada Logo
9:20 am - 12:06 pm
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
7:30 am - 7:20 am
STL
-
SYD
32h 50m
2 stops
$905Air Canada
Thu, May 14 - Fri, Jun 5
Delta Logo
9:40 am - 9:06 pm
SYD
-
STL
27h 26m
2 stops
Delta Logo
7:03 am - 7:50 am
STL
-
SYD
32h 47m
2 stops
$915Delta
Mon, Mar 23 - Mon, Mar 30
Air Canada Logo
9:20 am - 8:02 pm
SYD
-
STL
49h 42m
2 stops
Air Canada Logo
2:40 pm - 7:20 am
STL
-
SYD
49h 40m
2 stops
$951Air Canada
Wed, Aug 5 - Fri, Aug 28
Delta Logo
9:15 am - 9:14 pm
SYD
-
STL
26h 59m
2 stops
Delta Logo
6:00 am - 6:50 am
STL
-
SYD
33h 50m
2 stops
$969Delta
Sat, Jun 6 - Mon, Jun 29
Delta Logo
9:15 am - 8:40 am
SYD
-
STL
38h 25m
2 stops
Delta Logo
3:42 pm - 6:50 am
STL
-
SYD
24h 08m
2 stops
$974Delta
Sun, Jun 7 - Tue, Jun 30
Air Canada Logo
9:20 am - 8:05 pm
SYD
-
STL
49h 45m
3 stops
Air Canada Logo
1:00 pm - 7:20 am
STL
-
SYD
27h 20m
2 stops
$984Air Canada
Thu, May 14 - Thu, Jun 4
Air Canada Logo
9:20 am - 8:05 pm
SYD
-
STL
49h 45m
3 stops
Air Canada Logo
1:00 pm - 7:20 am
STL
-
SYD
51h 20m
3 stops
$1,040Air Canada
Thu, May 14 - Thu, Jun 4
American Airlines Logo
11:20 am - 6:00 pm
SYD
-
STL
23h 40m
2 stops
American Airlines Logo
9:35 am - 9:00 am
STL
-
SYD
30h 25m
2 stops
$1,044American Airlines
Thu, Feb 19 - Mon, Feb 23
American Airlines Logo
11:20 am - 6:00 pm
SYD
-
STL
23h 40m
2 stops
American Airlines Logo
8:00 am - 9:00 am
STL
-
SYD
32h 00m
2 stops
$1,047American Airlines
Thu, Feb 19 - Mon, Feb 23

Delta flights from Sydney to St. Louis

Our best Delta deals on Sydney to St. Louis flight tickets
Delta
Mar 23
SYD9:40 amSydney Kingsford Smith
27h 26m
2 stops
STL9:06 pmLambert-St Louis
Mar 30
STL7:03 amLambert-St Louis
32h 47m
2 stops
SYD7:50 amSydney Kingsford Smith
$915
Delta
Jun 6
SYD9:15 amSydney Kingsford Smith
26h 59m
2 stops
STL9:14 pmLambert-St Louis
Jun 29
STL6:00 amLambert-St Louis
33h 50m
2 stops
SYD6:50 amSydney Kingsford Smith
$969
Delta
Jun 7
SYD9:15 amSydney Kingsford Smith
38h 25m
2 stops
STL8:40 amLambert-St Louis
Jun 30
STL3:42 pmLambert-St Louis
24h 08m
2 stops
SYD6:50 amSydney Kingsford Smith
$974

Qantas Airways flights from Sydney to St. Louis

Our best Qantas Airways deals on Sydney to St. Louis flight tickets
Qantas Airways
Aug 5
SYD12:00 pmSydney Kingsford Smith
21h 29m
1 stop
STL6:29 pmLambert-St Louis
Aug 28
STL7:46 pmLambert-St Louis
20h 09m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,127
Qantas Airways
Jun 5
SYD12:00 pmSydney Kingsford Smith
19h 33m
1 stop
STL4:33 pmLambert-St Louis
Jun 26
STL6:36 amLambert-St Louis
33h 54m
1 stop
SYD7:30 amSydney Kingsford Smith
$1,203
Qantas Airways
Jul 6
SYD12:00 pmSydney Kingsford Smith
21h 30m
1 stop
STL6:30 pmLambert-St Louis
Jul 27
STL5:18 pmLambert-St Louis
22h 37m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,288

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 February 9, 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

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 5/14

9:20 am-8:04 pm

2 stops49h 44m

Lambert-St Louis

Thu 6/4

7:30 am-7:20 am

2 stops32h 50m

$881

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 5/14

9:20 am-12:06 pm

2 stops41h 46m

Lambert-St Louis

Fri 6/5

7:30 am-7:20 am

2 stops32h 50m

$905

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 3/23

9:40 am-9:06 pm

2 stops27h 26m

Lambert-St Louis

Mon 3/30

7:03 am-7:50 am

2 stops32h 47m

$915

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/5

9:20 am-8:02 pm

2 stops49h 42m

Lambert-St Louis

Fri 8/28

2:40 pm-7:20 am

2 stops49h 40m

$951

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/6

9:15 am-9:14 pm

2 stops26h 59m

Lambert-St Louis

Mon 6/29

6:00 am-6:50 am

2 stops33h 50m

$969

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 6/7

9:15 am-8:40 am

2 stops38h 25m

Lambert-St Louis

Tue 6/30

3:42 pm-6:50 am

2 stops24h 08m

$974

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 5/14

9:20 am-8:05 pm

3 stops49h 45m

Lambert-St Louis

Thu 6/4

1:00 pm-7:20 am

2 stops27h 20m

$984

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 5/14

9:20 am-8:05 pm

3 stops49h 45m

Lambert-St Louis

Thu 6/4

1:00 pm-7:20 am

3 stops51h 20m

$1,040

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 2/19

11:20 am-6:00 pm

2 stops23h 40m

Lambert-St Louis

Mon 2/23

9:35 am-9:00 am

2 stops30h 25m

$1,044

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 2/19

11:20 am-6:00 pm

2 stops23h 40m

Lambert-St Louis

Mon 2/23

8:00 am-9:00 am

2 stops32h 00m

$1,047

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 cheapest month to fly to St. Louis?

In general, August 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 $1,153. The month of April is another great option to travel to St. Louis, with average flight prices from Sydney averaging around $1,192.

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

You could potentially save up to 11% 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

22h 38m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 22h 38m
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?

    A flight from Sydney Kingsford Smith to Lambert-St Louis will travel around 9057.2 mi. Typically, this will take 22h 38m 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 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?

    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.

  • 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
Airline
Rating
Free Cancellation
Price
Qantas AirwaysPriceFrom $1,110Free CancellationRating
7.5
988 reviews
Search Qantas Airways flights

Traveling to a place near St. Louis?

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