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Cheap flights from Sydney to St. Louis from $889

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 23/6. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Sydney to St. Louis

Cheap return flights

Enter your travel dates to find the best prices.
American Airlines Logo
09:10 - 08:23
SYD
-
STL
38h 13m
2 stops
American Airlines Logo
05:42 - 06:55
STL
-
SYD
34h 13m
1 stop
$1,414American Airlines
Fri, 7 Aug - Tue, 11 Aug
American Airlines Logo
09:10 - 23:59
SYD
-
STL
29h 49m
1 stop
American Airlines Logo
15:35 - 07:05
STL
-
SYD
24h 30m
2 stops
$1,417American Airlines
Thu, 30 Jul - Sun, 9 Aug
American Airlines Logo
09:10 - 18:05
SYD
-
STL
23h 55m
2 stops
American Airlines Logo
15:34 - 07:05
STL
-
SYD
24h 31m
2 stops
$1,418American Airlines
Wed, 26 Aug - Wed, 9 Sep
Qantas Airways Logo
09:10 - 23:59
SYD
-
STL
29h 49m
1 stop
Qantas Airways Logo
06:00 - 07:05
STL
-
SYD
34h 05m
1 stop
$1,424Qantas Airways
Thu, 30 Jul - Sun, 9 Aug
American Airlines Logo
09:10 - 16:41
SYD
-
STL
22h 31m
2 stops
American Airlines Logo
13:25 - 07:30
STL
-
SYD
27h 05m
2 stops
$1,428American Airlines
Wed, 26 Aug - Sun, 6 Sep
Air Canada Logo
09:20 - 18:42
SYD
-
STL
48h 22m
3 stops
Air Canada Logo
12:10 - 07:20
STL
-
SYD
52h 10m
2 stops
$1,430Air Canada
Thu, 30 Jul - Sun, 9 Aug
Air Canada Logo
09:20 - 18:42
SYD
-
STL
48h 22m
3 stops
Air Canada Logo
12:10 - 07:20
STL
-
SYD
52h 10m
3 stops
$1,441Air Canada
Thu, 30 Jul - Sun, 9 Aug
Qantas Airways Logo
09:10 - 22:59
SYD
-
STL
28h 49m
1 stop
Qantas Airways Logo
06:30 - 07:05
STL
-
SYD
33h 35m
1 stop
$1,484Qantas Airways
Wed, 26 Aug - Wed, 9 Sep
Qantas Airways Logo
12:00 - 16:41
SYD
-
STL
19h 41m
1 stop
Qantas Airways Logo
18:45 - 06:55
STL
-
SYD
21h 10m
1 stop
$1,485Qantas Airways
Wed, 26 Aug - Sun, 6 Sep
American Airlines Logo
09:10 - 22:59
SYD
-
STL
28h 49m
1 stop
American Airlines Logo
06:00 - 07:05
STL
-
SYD
34h 05m
1 stop
$1,488American Airlines
Fri, 28 Aug - Mon, 7 Sep

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Air Canada flights from Sydney to St. Louis

Our best Air Canada deals on Sydney to St. Louis flight tickets
Air Canada
30 July
SYD09:20Sydney Kingsford Smith
48h 22m
3 stops
STL18:42Lambert-St Louis
9 Aug
STL12:10Lambert-St Louis
52h 10m
2 stops
SYD07:20Sydney Kingsford Smith
$1,430
Air Canada
30 July
SYD09:20Sydney Kingsford Smith
48h 22m
3 stops
STL18:42Lambert-St Louis
9 Aug
STL12:10Lambert-St Louis
52h 10m
3 stops
SYD07:20Sydney Kingsford Smith
$1,441
Air Canada
30 July
SYD09:20Sydney Kingsford Smith
48h 22m
2 stops
STL18:42Lambert-St Louis
3 Aug
STL12:10Lambert-St Louis
52h 10m
2 stops
SYD07:20Sydney Kingsford Smith
$1,515

Qantas Airways flights from Sydney to St. Louis

Our best Qantas Airways deals on Sydney to St. Louis flight tickets
Qantas Airways
30 July
SYD09:10Sydney Kingsford Smith
29h 49m
1 stop
STL23:59Lambert-St Louis
9 Aug
STL06:00Lambert-St Louis
34h 05m
1 stop
SYD07:05Sydney Kingsford Smith
$1,424
Qantas Airways
26 Aug
SYD09:10Sydney Kingsford Smith
28h 49m
1 stop
STL22:59Lambert-St Louis
9 Sept
STL06:30Lambert-St Louis
33h 35m
1 stop
SYD07:05Sydney Kingsford Smith
$1,484
Qantas Airways
26 Aug
SYD12:00Sydney Kingsford Smith
19h 41m
1 stop
STL16:41Lambert-St Louis
6 Sept
STL18:45Lambert-St Louis
21h 10m
1 stop
SYD06:55Sydney Kingsford Smith
$1,485

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 12 June 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

Fri 7/8

09:10-08:23

2 stops38h 13m

Lambert-St Louis

Tue 11/8

05:42-06:55

1 stop34h 13m

$1,414

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Sun 9/8

15:35-07:05

2 stops24h 30m

$1,417

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 26/8

09:10-18:05

2 stops23h 55m

Lambert-St Louis

Wed 9/9

15:34-07:05

2 stops24h 31m

$1,418

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Sun 9/8

06:00-07:05

1 stop34h 05m

$1,424

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 26/8

09:10-16:41

2 stops22h 31m

Lambert-St Louis

Sun 6/9

13:25-07:30

2 stops27h 05m

$1,428

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

09:20-18:42

3 stops48h 22m

Lambert-St Louis

Sun 9/8

12:10-07:20

2 stops52h 10m

$1,430

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

09:20-18:42

3 stops48h 22m

Lambert-St Louis

Sun 9/8

12:10-07:20

3 stops52h 10m

$1,441

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 26/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Wed 9/9

06:30-07:05

1 stop33h 35m

$1,484
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 26/8

12:00-16:41

1 stop19h 41m

Lambert-St Louis

Sun 6/9

18:45-06:55

1 stop21h 10m

$1,485

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 28/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Mon 7/9

06:00-07:05

1 stop34h 05m

$1,488

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 September is, on average, the cheapest month to fly to St. Louis from Sydney, with most prices found around $1,346. 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 $1,602.

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

You could potentially save up to 3% 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

20h 09m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 20h 09m
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 20h 09m.

  • 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 $1,187Free cancellationRating
7.4
9,812 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,516Free cancellationRating
7.5
1,046 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $1,636Free cancellationRating
7.1
11,645 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
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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