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Cheap flights from Sydney to St. Louis from $1,145

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 2/5. 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.
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
$1,427Multiple Airlines
Wed, 20 May - Thu, 28 May
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
$1,430Multiple Airlines
Wed, 20 May - Thu, 28 May
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
$1,431Multiple Airlines
Wed, 20 May - Thu, 28 May
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
$1,482Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
12:10 - 07:20
STL
-
SYD
52h 10m
2 stops
$1,489Air Canada
Mon, 25 May - Wed, 5 Aug
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,490Air Canada
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 23:57
SYD
-
STL
29h 37m
2 stops
Air Canada Logo
08:40 - 07:20
STL
-
SYD
55h 40m
2 stops
$1,494Air Canada
Wed, 10 Jun - Wed, 17 Jun
Air Canada Logo
09:20 - 20:39
SYD
-
STL
50h 19m
2 stops
Air Canada Logo
05:10 - 07:20
STL
-
SYD
35h 10m
2 stops
$1,507Air Canada
Mon, 10 Aug - Thu, 3 Sep
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
2 stops
$1,532Air Canada
Fri, 22 May - Sun, 31 May
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,536Air Canada
Wed, 20 May - Thu, 28 May

American Airlines flights from Sydney to St. Louis

Our best American Airlines deals on Sydney to St. Louis flight tickets
American Airlines
20 May
SYD09:10Sydney Kingsford Smith
29h 49m
1 stop
STL23:59Lambert-St Louis
28 May
STL14:37Lambert-St Louis
25h 28m
2 stops
SYD07:05Sydney Kingsford Smith
$1,736
American Airlines
20 May
SYD09:10Sydney Kingsford Smith
29h 49m
1 stop
STL23:59Lambert-St Louis
28 May
STL14:36Lambert-St Louis
25h 29m
2 stops
SYD07:05Sydney Kingsford Smith
$1,739
American Airlines
10 Aug
SYD09:10Sydney Kingsford Smith
24h 00m
2 stops
STL18:10Lambert-St Louis
3 Sept
STL16:18Lambert-St Louis
23h 47m
2 stops
SYD07:05Sydney Kingsford Smith
$1,742

Air Canada flights from Sydney to St. Louis

Our best Air Canada deals on Sydney to St. Louis flight tickets
Air Canada
25 May
SYD09:20Sydney Kingsford Smith
41h 46m
2 stops
STL12:06Lambert-St Louis
5 Aug
STL12:10Lambert-St Louis
52h 10m
2 stops
SYD07:20Sydney Kingsford Smith
$1,489
Air Canada
20 May
SYD09:20Sydney Kingsford Smith
26h 05m
2 stops
STL20:25Lambert-St Louis
28 May
STL13:05Lambert-St Louis
51h 15m
3 stops
SYD07:20Sydney Kingsford Smith
$1,490
Air Canada
10 June
SYD09:20Sydney Kingsford Smith
29h 37m
2 stops
STL23:57Lambert-St Louis
17 June
STL08:40Lambert-St Louis
55h 40m
2 stops
SYD07:20Sydney Kingsford Smith
$1,494

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 28 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

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

16:48-07:20

2 stops23h 32m

$1,427

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

$1,430

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

$1,431

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

$1,482

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 25/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Wed 5/8

12:10-07:20

2 stops52h 10m

$1,489

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,490

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 10/6

09:20-23:57

2 stops29h 37m

Lambert-St Louis

Wed 17/6

08:40-07:20

2 stops55h 40m

$1,494

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 10/8

09:20-20:39

2 stops50h 19m

Lambert-St Louis

Thu 3/9

05:10-07:20

2 stops35h 10m

$1,507

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 22/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Sun 31/5

13:05-07:20

2 stops51h 15m

$1,532

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,536

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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2

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 $1,320. If you aren’t able to travel to St. Louis during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,606.

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

22h 31m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 22h 31m
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 22h 31m.

  • 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 $1,160Free cancellationRating
7.4
9,675 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,605Free cancellationRating
7.1
11,676 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $1,691Free cancellationRating
7.5
1,028 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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