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Cheap flights from Sydney to St. Louis from $857

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 27/8. 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 - 23:59
SYD
-
STL
29h 49m
1 stop
American Airlines Logo
15:35 - 06:55
STL
-
SYD
24h 20m
1 stop
$1,427American Airlines
Tue, 4 Aug - Thu, 20 Aug
United Airlines Logo
10:20 - 22:41
SYD
-
STL
27h 21m
2 stops
United Airlines Logo
16:40 - 07:00
STL
-
SYD
23h 20m
2 stops
$1,459United Airlines
Tue, 7 Jul - Sun, 30 Aug
United Airlines Logo
09:30 - 23:57
SYD
-
STL
29h 27m
2 stops
United Airlines Logo
19:23 - 06:55
STL
-
SYD
20h 32m
1 stop
$1,460United Airlines
Mon, 20 Jul - Mon, 27 Jul
United Airlines Logo
10:20 - 18:17
SYD
-
STL
22h 57m
1 stop
United Airlines Logo
19:23 - 06:55
STL
-
SYD
20h 32m
1 stop
$1,473United Airlines
Mon, 20 Jul - Mon, 27 Jul
American Airlines Logo
09:10 - 16:28
SYD
-
STL
22h 18m
2 stops
American Airlines Logo
18:45 - 06:55
STL
-
SYD
21h 10m
1 stop
$1,512American Airlines
Tue, 4 Aug - Thu, 20 Aug
Delta Logo
09:15 - 00:43
SYD
-
STL
30h 28m
2 stops
Delta Logo
11:13 - 06:50
STL
-
SYD
28h 37m
2 stops
$1,519Delta
Mon, 6 Jul - Sun, 30 Aug
United Airlines Logo
10:20 - 12:42
SYD
-
STL
41h 22m
2 stops
United Airlines Logo
16:40 - 06:55
STL
-
SYD
23h 15m
2 stops
$1,529United Airlines
Sat, 4 Jul - Tue, 1 Sep
American Airlines Logo
09:10 - 16:40
SYD
-
STL
22h 30m
2 stops
American Airlines Logo
06:00 - 09:15
STL
-
SYD
36h 15m
2 stops
$1,544American Airlines
Tue, 4 Aug - Thu, 20 Aug
Air New Zealand Logo
10:20 - 18:17
SYD
-
STL
22h 57m
1 stop
Air New Zealand Logo
19:23 - 06:55
STL
-
SYD
20h 32m
1 stop
$1,545Air New Zealand
Mon, 20 Jul - Mon, 27 Jul
Delta Logo
09:15 - 08:46
SYD
-
STL
38h 31m
2 stops
Delta Logo
17:34 - 06:50
STL
-
SYD
46h 16m
2 stops
$1,555Delta
Mon, 6 Jul - Sat, 5 Sep

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American Airlines flights from Sydney to St. Louis

Our best American Airlines deals on Sydney to St. Louis flight tickets
American Airlines
12 Aug
SYD09:10Sydney Kingsford Smith
26h 16m
2 stops
STL20:26Lambert-St Louis
16 Aug
STL12:45Lambert-St Louis
27h 20m
2 stops
SYD07:05Sydney Kingsford Smith
$1,563
American Airlines
6 Aug
SYD09:10Sydney Kingsford Smith
23h 55m
2 stops
STL18:05Lambert-St Louis
10 Aug
STL12:55Lambert-St Louis
27h 10m
2 stops
SYD07:05Sydney Kingsford Smith
$1,564
American Airlines
6 Aug
SYD09:10Sydney Kingsford Smith
28h 31m
2 stops
STL22:41Lambert-St Louis
10 Aug
STL20:07Lambert-St Louis
43h 58m
2 stops
SYD07:05Sydney Kingsford Smith
$1,565

Qantas Airways flights from Sydney to St. Louis

Our best Qantas Airways deals on Sydney to St. Louis flight tickets
Qantas Airways
12 Aug
SYD09:10Sydney Kingsford Smith
28h 49m
1 stop
STL22:59Lambert-St Louis
16 Aug
STL06:00Lambert-St Louis
34h 05m
1 stop
SYD07:05Sydney Kingsford Smith
$1,627
Qantas Airways
6 Aug
SYD09:10Sydney Kingsford Smith
28h 49m
1 stop
STL22:59Lambert-St Louis
10 Aug
STL06:00Lambert-St Louis
34h 05m
1 stop
SYD07:05Sydney Kingsford Smith
$1,629
Qantas Airways
12 Aug
SYD09:10Sydney Kingsford Smith
28h 49m
1 stop
STL22:59Lambert-St Louis
16 Aug
STL06:00Lambert-St Louis
34h 05m
1 stop
SYD07:05Sydney Kingsford Smith
$1,630

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 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

Tue 4/8

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 20/8

15:35-06:55

1 stop24h 20m

$1,427

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 7/7

10:20-22:41

2 stops27h 21m

Lambert-St Louis

Sun 30/8

16:40-07:00

2 stops23h 20m

$1,459

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 20/7

09:30-23:57

2 stops29h 27m

Lambert-St Louis

Mon 27/7

19:23-06:55

1 stop20h 32m

$1,460

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 20/7

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Mon 27/7

19:23-06:55

1 stop20h 32m

$1,473
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 4/8

09:10-16:28

2 stops22h 18m

Lambert-St Louis

Thu 20/8

18:45-06:55

1 stop21h 10m

$1,512

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 6/7

09:15-00:43

2 stops30h 28m

Lambert-St Louis

Sun 30/8

11:13-06:50

2 stops28h 37m

$1,519

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 4/7

10:20-12:42

2 stops41h 22m

Lambert-St Louis

Tue 1/9

16:40-06:55

2 stops23h 15m

$1,529

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 4/8

09:10-16:40

2 stops22h 30m

Lambert-St Louis

Thu 20/8

06:00-09:15

2 stops36h 15m

$1,544

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 20/7

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Mon 27/7

19:23-06:55

1 stop20h 32m

$1,545

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 6/7

09:15-08:46

2 stops38h 31m

Lambert-St Louis

Sat 5/9

17:34-06:50

2 stops46h 16m

$1,555

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 $1,496. 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 $1,591.

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

28h 49m

Direct flights

None
The fastest flight from Sydney to St. Louis takes 28h 49m
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 28h 49m.

  • 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 $1,204Free cancellationRating
7.4
9,879 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,527Free cancellationRating
7.5
1,050 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $1,660Free cancellationRating
7.1
11,750 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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