What is the cheapest airline that flies from Lambert-St Louis to Sydney Kingsford Smith?

United Airlines and Qantas Airways are the most popular carriers operating from Lambert-St Louis to Sydney Kingsford Smith

When did momondo last update prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?

Prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport refresh daily.

How old do you have to be to fly from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$917 Cheap Flights from St. Louis to Sydney in 2026/27

Find the cheapest flights from St. Louis to Sydney

Return

One-way

Cheap return flights

Enter your travel dates to find the best prices.

14:23 - 14:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 27m2 stops Dallas/Fort Worth Auckland Intl

11:20 - 23:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 39m1 stop Los Angeles

$1,636Qantas Airways

Mon, 8 Mar - Sat, 20 Mar

14:23 - 14:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 27m2 stops Dallas/Fort Worth Auckland Intl

11:20 - 23:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 39m1 stop Los Angeles

$1,760Qantas Airways

Mon, 8 Mar - Sat, 20 Mar

17:00 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

20h 55m1 stop Dallas/Fort Worth

06:55 - 13:41SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 46m2 stops Brisbane Dallas/Fort Worth

$1,802Multiple Airlines

Wed, 3 Feb - Fri, 26 Feb

11:53 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 32m2 stops Chicago O'Hare Intl Los Angeles

11:05 - 19:32SYD Sydney Kingsford Smith-STL Lambert-St Louis

25h 27m3 stops Brisbane Los Angeles Chicago O'Hare Intl

$1,804Multiple Airlines

Wed, 3 Feb - Fri, 26 Feb

11:53 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 32m2 stops Chicago O'Hare Intl Los Angeles

06:05 - 13:41SYD Sydney Kingsford Smith-STL Lambert-St Louis

24h 36m2 stops Brisbane Dallas/Fort Worth

$1,808Multiple Airlines

Wed, 3 Feb - Sat, 27 Feb

20:02 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

41h 23m3 stops Chicago O'Hare Intl Dallas/Fort Worth Los Angeles

06:05 - 13:41SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 36m2 stops Brisbane Dallas/Fort Worth

$1,811Multiple Airlines

Mon, 8 Mar - Sat, 20 Mar

17:00 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

20h 55m1 stop Dallas/Fort Worth

06:05 - 18:09SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 04m2 stops Brisbane Dallas/Fort Worth

$1,828Qantas Airways

Wed, 3 Feb - Sat, 27 Feb

17:00 - 20:40STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 40m2 stops Dallas/Fort Worth Brisbane

11:20 - 23:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 39m1 stop Los Angeles

$1,844Qantas Airways

Wed, 3 Feb - Fri, 26 Feb

17:00 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

20h 55m1 stop Dallas/Fort Worth

11:05 - 23:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 54m2 stops Brisbane Los Angeles

$1,853Qantas Airways

Tue, 2 Feb - Sat, 27 Feb

14:55 - 08:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 40m2 stops Dallas/Fort Worth Melbourne

06:05 - 18:09SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 04m2 stops Brisbane Dallas/Fort Worth

$1,855Qantas Airways

Tue, 2 Feb - Sat, 27 Feb

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Qantas Airways flights from St. Louis to Sydney

Our best Qantas Airways deals on St. Louis to Sydney flight tickets

Qantas Airways

8 Mar

STL14:23Lambert-St Louis

31h 27m

2 stops

SYD14:50Sydney Kingsford Smith

20 Mar

SYD11:20Sydney Kingsford Smith

28h 39m

1 stop

STL23:59Lambert-St Louis

$1,636

Qantas Airways

8 Mar

STL14:23Lambert-St Louis

31h 27m

2 stops

SYD14:50Sydney Kingsford Smith

20 Mar

SYD11:20Sydney Kingsford Smith

28h 39m

1 stop

STL23:59Lambert-St Louis

$1,760

Qantas Airways

3 Feb

STL17:00Lambert-St Louis

20h 55m

1 stop

SYD06:55Sydney Kingsford Smith

27 Feb

SYD06:05Sydney Kingsford Smith

29h 04m

2 stops

STL18:09Lambert-St Louis

$1,828

Air New Zealand flights from St. Louis to Sydney

Our best Air New Zealand deals on St. Louis to Sydney flight tickets

Air New Zealand

1 Feb

STL06:15Lambert-St Louis

35h 20m

2 stops

SYD10:35Sydney Kingsford Smith

15 Feb

SYD19:25Sydney Kingsford Smith

44h 00m

2 stops

STL22:25Lambert-St Louis

$1,904

Air New Zealand

8 Mar

STL06:15Lambert-St Louis

35h 20m

2 stops

SYD10:35Sydney Kingsford Smith

20 Mar

SYD19:25Sydney Kingsford Smith

42h 47m

2 stops

STL22:12Lambert-St Louis

$1,910

Air New Zealand

13 Feb

STL17:59Lambert-St Louis

45h 36m

2 stops

SYD08:35Sydney Kingsford Smith

1 Mar

SYD19:25Sydney Kingsford Smith

44h 00m

2 stops

STL22:25Lambert-St Louis

$1,927

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 8/3

14:23-14:50

2 stops31h 27m

Sydney Kingsford Smith

Sat 20/3

11:20-23:59

1 stop28h 39m

$1,636

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 8/3

14:23-14:50

2 stops31h 27m

Sydney Kingsford Smith

Sat 20/3

11:20-23:59

1 stop28h 39m

$1,760

Fastest return journey

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 3/2

17:00-06:55

1 stop20h 55m

Sydney Kingsford Smith

Fri 26/2

06:55-13:41

2 stops23h 46m

$1,802

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 3/2

11:53-06:25

2 stops25h 32m

Sydney Kingsford Smith

Fri 26/2

11:05-19:32

3 stops25h 27m

$1,804

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 3/2

11:53-06:25

2 stops25h 32m

Sydney Kingsford Smith

Sat 27/2

06:05-13:41

2 stops24h 36m

$1,808

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 8/3

20:02-06:25

3 stops41h 23m

Sydney Kingsford Smith

Sat 20/3

06:05-13:41

2 stops23h 36m

$1,811

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 3/2

17:00-06:55

1 stop20h 55m

Sydney Kingsford Smith

Sat 27/2

06:05-18:09

2 stops29h 04m

$1,828

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 3/2

17:00-20:40

2 stops34h 40m

Sydney Kingsford Smith

Fri 26/2

11:20-23:59

1 stop29h 39m

$1,844

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 2/2

17:00-06:55

1 stop20h 55m

Sydney Kingsford Smith

Sat 27/2

11:05-23:59

2 stops29h 54m

$1,853

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 2/2

14:55-08:35

2 stops24h 40m

Sydney Kingsford Smith

Sat 27/2

06:05-18:09

2 stops29h 04m

$1,855

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Sydney

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

Prices

Airlines

What is the typical price of a round-trip flight between St. Louis and Sydney?

Prices are currently low for flights on this route.

Typical prices usually range from $2,000 to $2,718.
The lowest price recently found on this route was $1,636.

What is the cheapest month to fly to Sydney?

The month of March is, on average, the cheapest month to fly to Sydney from St. Louis, with most prices found around $1,774. If you aren’t able to travel to Sydney during the month of March, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $1,898.

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

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to Sydney flight.

When to book flights from St. Louis to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap St. Louis to Sydney (STL to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sydney

Best price found	$917
Fastest flight time	23h 11m
Direct flights	None

The best one-way flight to Sydney from St. Louis in the past 72 hours is $917. The best return flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,636.

The fastest flight from St. Louis to Sydney takes 23h 11m

There are no direct flights from St. Louis to Sydney. There are no popular flight routes from St. Louis to Sydney.

Search flight deals

Frequently asked questions about flying from St. Louis to Sydney

How far is Lambert-St Louis to Sydney Kingsford Smith by plane?
A flight from Lambert-St Louis to Sydney Kingsford Smith will travel around 14576.1 km. In terms of flight time, this usually takes a little over 23h 11m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?
Prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport refresh daily.
How old do you have to be to fly from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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Can I find flights from St. Louis to Sydney with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sydney from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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