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Cheap flights from Sydney to St. Louis from $1,139

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 30/7. 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

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Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
07:05 - 07:20
STL
-
SYD
33h 15m
2 stops
$1,340Air Canada
Thu, 7 May - Thu, 14 May
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
$1,350Air Canada
Wed, 20 May - Thu, 28 May
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
13:38 - 07:20
STL
-
SYD
26h 42m
2 stops
$1,351Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
07:05 - 07:20
STL
-
SYD
57h 15m
2 stops
$1,355Air Canada
Thu, 14 May - Sun, 7 Jun
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
13:38 - 07:20
STL
-
SYD
26h 42m
2 stops
$1,357Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
13:00 - 07:20
STL
-
SYD
51h 20m
3 stops
$1,365Air Canada
Thu, 14 May - Sun, 7 Jun
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
13:38 - 07:20
STL
-
SYD
26h 42m
2 stops
$1,405Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 14:00
SYD
-
STL
43h 40m
2 stops
Air Canada Logo
08:55 - 07:20
STL
-
SYD
55h 25m
2 stops
$1,410Air Canada
Sun, 13 Sep - Wed, 23 Sep
Air Canada Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,434Air Canada
Thu, 7 May - Thu, 14 May
Air Canada Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,440Air 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
14 May
SYD17:50Sydney Kingsford Smith
21h 09m
1 stop
STL23:59Lambert-St Louis
7 June
STL06:35Lambert-St Louis
33h 30m
1 stop
SYD07:05Sydney Kingsford Smith
$1,667
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
$1,718
American Airlines
5 Aug
SYD09:10Sydney Kingsford Smith
28h 58m
1 stop
STL23:08Lambert-St Louis
29 Aug
STL17:11Lambert-St Louis
22h 54m
2 stops
SYD07:05Sydney Kingsford Smith
$1,724

Air Canada flights from Sydney to St. Louis

Our best Air Canada deals on Sydney to St. Louis flight tickets
Air Canada
7 May
SYD09:20Sydney Kingsford Smith
41h 46m
2 stops
STL12:06Lambert-St Louis
14 May
STL07:05Lambert-St Louis
33h 15m
2 stops
SYD07:20Sydney Kingsford Smith
$1,340
Air Canada
20 May
SYD09:20Sydney Kingsford Smith
41h 46m
2 stops
STL12:06Lambert-St Louis
28 May
STL13:05Lambert-St Louis
27h 15m
2 stops
SYD07:20Sydney Kingsford Smith
$1,350
Air Canada
14 May
SYD09:20Sydney Kingsford Smith
41h 46m
2 stops
STL12:06Lambert-St Louis
7 June
STL07:05Lambert-St Louis
57h 15m
2 stops
SYD07:20Sydney Kingsford Smith
$1,355

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 23 March 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

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 7/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 14/5

07:05-07:20

2 stops33h 15m

$1,340

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

$1,350
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

13:38-07:20

2 stops26h 42m

$1,351

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 14/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Sun 7/6

07:05-07:20

2 stops57h 15m

$1,355

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

13:38-07:20

2 stops26h 42m

$1,357

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 14/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Sun 7/6

13:00-07:20

3 stops51h 20m

$1,365

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

13:38-07:20

2 stops26h 42m

$1,405

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 13/9

09:20-14:00

2 stops43h 40m

Lambert-St Louis

Wed 23/9

08:55-07:20

2 stops55h 25m

$1,410

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 7/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 14/5

13:05-07:20

3 stops51h 15m

$1,434

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

3 stops51h 15m

$1,440

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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 May is, on average, the cheapest month to fly to St. Louis from Sydney, with most prices found around $1,584. If you aren’t able to travel to St. Louis during the month of May, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,613.

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

19h 33m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 19h 33m
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?

    Sydney Kingsford Smith and Lambert-St Louis are 14576.1 km apart from one another. By plane, this route typically takes 19h 33m.

  • 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 $1,191Free cancellationRating
7.4
9,464 reviews
Search United Airlines flights
Air CanadaPriceFrom $1,497Free cancellationRating
7.1
10,835 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $1,553Free cancellationRating
7.5
1,009 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $1,648Free cancellationRating
7.1
11,489 reviews
Search American Airlines flights

Travelling to a place near St. Louis?

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