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Cheap flights from Sydney to St. Louis from $1,712

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 20/5. 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

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Find the cheapest flights from Sydney to St. Louis

Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,712Air Canada
Wed, 20 May - Thu, 11 Jun
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,715Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 20:25
SYD
-
STL
50h 05m
3 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
2 stops
$1,724Air Canada
Wed, 27 May - Wed, 3 Jun
Air Canada Logo
09:20 - 20:25
SYD
-
STL
50h 05m
3 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,736Air Canada
Wed, 27 May - Wed, 3 Jun
Air Canada Logo
09:20 - 20:43
SYD
-
STL
26h 23m
2 stops
Air Canada Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,763Air Canada
Wed, 20 May - Thu, 11 Jun
Air Canada Logo
09:20 - 20:09
SYD
-
STL
25h 49m
2 stops
Air Canada Logo
14:15 - 07:20
STL
-
SYD
26h 05m
2 stops
$1,776Air Canada
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,779Air Canada
Wed, 20 May - Fri, 12 Jun
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,780Air Canada
Wed, 20 May - Fri, 12 Jun
Air Canada Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
27h 15m
2 stops
$1,783Air Canada
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 16:31
SYD
-
STL
46h 11m
2 stops
Air Canada Logo
14:40 - 07:20
STL
-
SYD
49h 40m
2 stops
$1,787Air Canada
Thu, 13 Aug - Sun, 6 Sep

American Airlines flights from Sydney to St. Louis

Our best American Airlines deals on Sydney to St. Louis flight tickets
American Airlines
6 Aug
SYD09:10Sydney Kingsford Smith
22h 31m
2 stops
STL16:41Lambert-St Louis
30 Aug
STL06:00Lambert-St Louis
34h 05m
1 stop
SYD07:05Sydney Kingsford Smith
$2,070
American Airlines
6 Aug
SYD12:00Sydney Kingsford Smith
19h 41m
1 stop
STL16:41Lambert-St Louis
30 Aug
STL06:00Lambert-St Louis
34h 05m
1 stop
SYD07:05Sydney Kingsford Smith
$2,082
American Airlines
20 May
SYD09:10Sydney Kingsford Smith
29h 49m
1 stop
STL23:59Lambert-St Louis
11 June
STL17:18Lambert-St Louis
22h 47m
2 stops
SYD07:05Sydney Kingsford Smith
$2,138

Air Canada flights from Sydney to St. Louis

Our best Air Canada deals on Sydney to St. Louis flight tickets
Air Canada
20 May
SYD09:20Sydney Kingsford Smith
26h 05m
2 stops
STL20:25Lambert-St Louis
11 June
STL16:48Lambert-St Louis
23h 32m
2 stops
SYD07:20Sydney Kingsford Smith
$1,712
Air Canada
27 May
SYD09:20Sydney Kingsford Smith
50h 05m
3 stops
STL20:25Lambert-St Louis
3 June
STL13:05Lambert-St Louis
51h 15m
2 stops
SYD07:20Sydney Kingsford Smith
$1,724
Air Canada
27 May
SYD09:20Sydney Kingsford Smith
50h 05m
3 stops
STL20:25Lambert-St Louis
3 June
STL13:05Lambert-St Louis
51h 15m
3 stops
SYD07:20Sydney Kingsford Smith
$1,736

momondo Fare Finder

 
Customise 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 78,305 searches. Data last updated 14 April 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 return flight
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Thu 11/6

16:48-07:20

2 stops23h 32m

$1,712

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

16:48-07:20

2 stops23h 32m

$1,715

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:20-20:25

3 stops50h 05m

Lambert-St Louis

Wed 3/6

13:05-07:20

2 stops51h 15m

$1,724

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:20-20:25

3 stops50h 05m

Lambert-St Louis

Wed 3/6

13:05-07:20

3 stops51h 15m

$1,736

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:43

2 stops26h 23m

Lambert-St Louis

Thu 11/6

16:48-07:20

2 stops23h 32m

$1,763

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:09

2 stops25h 49m

Lambert-St Louis

Thu 28/5

14:15-07:20

2 stops26h 05m

$1,776

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Fri 12/6

16:48-07:20

2 stops23h 32m

$1,779

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Fri 12/6

16:48-07:20

2 stops23h 32m

$1,780

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

13:05-07:20

2 stops27h 15m

$1,783

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 13/8

09:20-16:31

2 stops46h 11m

Lambert-St Louis

Sun 6/9

14:40-07:20

2 stops49h 40m

$1,787

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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?

The month of September is, on average, the cheapest month to fly to St. Louis from Sydney, with most prices found around $1,343. If you aren’t able to travel to St. Louis during the month of September, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,578.

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

You could potentially save up to 8% 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

Fastest flight time

21h 37m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 21h 37m
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 21h 37m.

  • 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?

  • 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?

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 AirlinesPriceFrom $1,180Free cancellationRating
7.4
9,581 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,632Free cancellationRating
7.1
11,573 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $1,720Free cancellationRating
7.5
1,018 reviews
Search Qantas Airways flights

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
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.

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