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Cheap flights from Sydney to St. Louis from $1,094

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 8/6. 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
65h 46m
2 stops
Air Canada Logo
07:05 - 07:20
STL
-
SYD
33h 15m
2 stops
$1,335Air 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
$1,388Multiple 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
$1,443Multiple 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
$1,458Multiple Airlines
Wed, 20 May - Thu, 28 May
Multiple Airlines Logo
09:20 - 16:57
SYD
-
STL
22h 37m
2 stops
Multiple Airlines Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,475Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 14:02
SYD
-
STL
43h 42m
2 stops
Air Canada Logo
08:55 - 07:20
STL
-
SYD
55h 25m
2 stops
$1,481Air Canada
Wed, 5 Aug - Sat, 29 Aug
Air Canada Logo
09:20 - 14:02
SYD
-
STL
43h 42m
2 stops
Air Canada Logo
08:55 - 07:20
STL
-
SYD
55h 25m
2 stops
$1,488Air Canada
Thu, 6 Aug - Sun, 30 Aug
Multiple Airlines Logo
09:20 - 16:57
SYD
-
STL
22h 37m
2 stops
Multiple Airlines Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,546Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 20:04
SYD
-
STL
49h 44m
2 stops
Air Canada Logo
07:05 - 07:20
STL
-
SYD
33h 15m
2 stops
$1,549Air Canada
Wed, 20 May - Thu, 28 May
Air New Zealand Logo
11:55 - 10:07
SYD
-
STL
37h 12m
2 stops
Air New Zealand Logo
15:02 - 08:45
STL
-
SYD
26h 43m
2 stops
$1,564Air New Zealand
Wed, 5 Aug - Sat, 29 Aug

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
65h 46m
2 stops
STL12:06Lambert-St Louis
28 May
STL07:05Lambert-St Louis
33h 15m
2 stops
SYD07:20Sydney Kingsford Smith
$1,335
Air Canada
5 Aug
SYD09:20Sydney Kingsford Smith
43h 42m
2 stops
STL14:02Lambert-St Louis
29 Aug
STL08:55Lambert-St Louis
55h 25m
2 stops
SYD07:20Sydney Kingsford Smith
$1,481
Air Canada
6 Aug
SYD09:20Sydney Kingsford Smith
43h 42m
2 stops
STL14:02Lambert-St Louis
30 Aug
STL08:55Lambert-St Louis
55h 25m
2 stops
SYD07:20Sydney Kingsford Smith
$1,488

American Airlines flights from Sydney to St. Louis

Our best American Airlines deals on Sydney to St. Louis flight tickets
American Airlines
6 Aug
SYD17:50Sydney Kingsford Smith
20h 18m
1 stop
STL23:08Lambert-St Louis
30 Aug
STL17:11Lambert-St Louis
22h 54m
2 stops
SYD07:05Sydney Kingsford Smith
$1,649
American Airlines
20 May
SYD17:50Sydney Kingsford Smith
21h 09m
1 stop
STL23:59Lambert-St Louis
28 May
STL06:35Lambert-St Louis
33h 30m
1 stop
SYD07:05Sydney Kingsford Smith
$1,698
American Airlines
20 May
SYD09:10Sydney Kingsford Smith
29h 49m
1 stop
STL23:59Lambert-St Louis
28 May
STL06:35Lambert-St Louis
33h 30m
1 stop
SYD07:05Sydney Kingsford Smith
$1,701

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 19 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

Wed 20/5

09:20-12:06

2 stops65h 46m

Lambert-St Louis

Thu 28/5

07:05-07:20

2 stops33h 15m

$1,335

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

$1,388

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

$1,443

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

$1,458

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-16:57

2 stops22h 37m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,475

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/8

09:20-14:02

2 stops43h 42m

Lambert-St Louis

Sat 29/8

08:55-07:20

2 stops55h 25m

$1,481

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/8

09:20-14:02

2 stops43h 42m

Lambert-St Louis

Sun 30/8

08:55-07:20

2 stops55h 25m

$1,488

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-16:57

2 stops22h 37m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,546

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:04

2 stops49h 44m

Lambert-St Louis

Thu 28/5

07:05-07:20

2 stops33h 15m

$1,549
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/8

11:55-10:07

2 stops37h 12m

Lambert-St Louis

Sat 29/8

15:02-08:45

2 stops26h 43m

$1,564

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 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 $1,564. 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 $1,592.

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 14m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 21h 14m
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 21h 14m.

  • 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 $1,176Free cancellationRating
7.4
9,436 reviews
Search United Airlines flights
Air CanadaPriceFrom $1,478Free cancellationRating
7.1
10,815 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $1,534Free cancellationRating
7.5
1,006 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
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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