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

Qantas Airways is the most popular carrier 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.

$1,045 Cheap Flights from St. Louis to Sydney in 2026/27

Find the cheapest flights from St. Louis to Sydney

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

13:20 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 15m2 stops Denver Intl Vancouver Intl

10:20 - 15:26SYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 06m2 stops Vancouver Intl Toronto Pearson Intl

$1,553Multiple Airlines

Mon, 8 Mar - Sat, 20 Mar

16:05 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

48h 30m1 stop Toronto Pearson Intl

10:20 - 15:26SYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 06m2 stops Vancouver Intl Toronto Pearson Intl

$1,558Air Canada

Mon, 8 Mar - Sat, 20 Mar

16:05 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

48h 30m2 stops Toronto Pearson Intl Vancouver Intl

11:20 - 12:10SYD Sydney Kingsford Smith-STL Lambert-St Louis

41h 50m3 stops Vancouver Intl Toronto Pearson Intl Chicago O'Hare Intl

$1,701Air Canada

Sat, 7 Nov - Wed, 11 Nov

17:34 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

47h 01m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vancouver Intl

11:20 - 12:10SYD Sydney Kingsford Smith-STL Lambert-St Louis

41h 50m3 stops Vancouver Intl Toronto Pearson Intl Chicago O'Hare Intl

$1,715Air Canada

Sat, 7 Nov - Wed, 11 Nov

16:05 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

48h 30m2 stops Toronto Pearson Intl Vancouver Intl

11:20 - 15:26SYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 06m2 stops Vancouver Intl Toronto Pearson Intl

$1,719Air Canada

Sat, 7 Nov - Wed, 11 Nov

09:05 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

28h 50m2 stops Chicago O'Hare Intl Vancouver Intl

11:20 - 15:26SYD Sydney Kingsford Smith-STL Lambert-St Louis

45h 06m2 stops Vancouver Intl Toronto Pearson Intl

$1,741Multiple Airlines

Thu, 14 Jan - Mon, 1 Feb

12:53 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 32m2 stops Dallas/Fort Worth San Francisco

09:10 - 19:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

25h 20m3 stops Brisbane Los Angeles Dallas/Fort Worth

$1,772Multiple Airlines

Fri, 29 Jan - Sat, 15 May

12:53 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 32m2 stops Dallas/Fort Worth San Francisco

09:10 - 19:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

25h 20m3 stops Brisbane Los Angeles Dallas/Fort Worth

$1,774Multiple Airlines

Fri, 29 Jan - Sat, 15 May

15:45 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

22h 10m1 stop Dallas/Fort Worth

11:05 - 20:01SYD Sydney Kingsford Smith-STL Lambert-St Louis

25h 56m3 stops Brisbane Los Angeles Dallas/Fort Worth

$1,775Multiple Airlines

Sun, 24 Jan - Sat, 6 Feb

19:50 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

41h 35m3 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl Los Angeles

06:05 - 13:39SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 34m2 stops Brisbane Dallas/Fort Worth

$1,781Multiple Airlines

Mon, 8 Mar - Sat, 20 Mar

Cheap last-minute flights

Enter your travel dates to find the best prices.

12:10 - 08:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

52h 25m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

10:20 - 16:23SYD Sydney Kingsford Smith-STL Lambert-St Louis

46h 03m2 stops Vancouver Intl Toronto Pearson Intl

$1,552Air Canada

Sat, 24 Oct - Sat, 31 Oct

15:20 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 35m1 stop Dallas/Fort Worth

14:05 - 19:16SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 11m1 stop Dallas/Fort Worth

$1,755Qantas Airways

Mon, 26 Oct - Sun, 1 Nov

14:40 - 08:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

49h 55m2 stops Toronto Pearson Intl Vancouver Intl

10:20 - 22:40SYD Sydney Kingsford Smith-STL Lambert-St Louis

52h 20m3 stops Vancouver Intl Toronto Pearson Intl Chicago O'Hare Intl

$1,772Air Canada

Sat, 24 Oct - Sat, 31 Oct

15:20 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 40m2 stops Dallas/Fort Worth Los Angeles

11:15 - 19:16SYD Sydney Kingsford Smith-STL Lambert-St Louis

24h 01m2 stops Los Angeles Dallas/Fort Worth

$1,790American Airlines

Mon, 26 Oct - Sun, 1 Nov

15:20 - 08:15STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 55m2 stops Dallas/Fort Worth Melbourne

13:05 - 17:02SYD Sydney Kingsford Smith-STL Lambert-St Louis

19h 57m1 stop Dallas/Fort Worth

$1,864Qantas Airways

Sat, 24 Oct - Sat, 31 Oct

10:27 - 08:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

30h 08m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vancouver Intl

10:20 - 23:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 04m3 stops Vancouver Intl Toronto Pearson Intl Chicago O'Hare Intl

$1,884Air Canada

Sat, 24 Oct - Sat, 31 Oct

15:20 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 35m1 stop Dallas/Fort Worth

13:05 - 15:04SYD Sydney Kingsford Smith-STL Lambert-St Louis

41h 59m1 stop Dallas/Fort Worth

$1,916Qantas Airways

Sat, 24 Oct - Sat, 31 Oct

14:55 - 10:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 40m2 stops Houston George Bush Intcntl Auckland Intl

11:50 - 00:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 34m3 stops Auckland Intl San Francisco Chicago O'Hare Intl

$2,589Multiple Airlines

Mon, 26 Oct - Sun, 1 Nov

13:40 - 08:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 55m3 stops Denver Intl Los Angeles Auckland Intl

14:05 - 00:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

26h 19m3 stops Auckland Intl Los Angeles Chicago O'Hare Intl

$2,810Multiple Airlines

Mon, 26 Oct - Sun, 1 Nov

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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

28 Oct

STL12:47Lambert-St Louis

26h 08m

1 stop

SYD06:55Sydney Kingsford Smith

4 Nov

SYD11:10Sydney Kingsford Smith

26h 32m

1 stop

STL20:42Lambert-St Louis

$1,715

Qantas Airways

26 Oct

STL15:20Lambert-St Louis

23h 35m

1 stop

SYD06:55Sydney Kingsford Smith

1 Nov

SYD14:05Sydney Kingsford Smith

21h 11m

1 stop

STL19:16Lambert-St Louis

$1,755

Qantas Airways

24 Oct

STL15:20Lambert-St Louis

23h 35m

1 stop

SYD06:55Sydney Kingsford Smith

31 Oct

SYD06:05Sydney Kingsford Smith

24h 25m

2 stops

STL14:30Lambert-St Louis

$1,801

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

24 Jan

STL08:30Lambert-St Louis

33h 05m

2 stops

SYD10:35Sydney Kingsford Smith

6 Feb

SYD19:25Sydney Kingsford Smith

44h 05m

2 stops

STL22:30Lambert-St Louis

$1,858

Air New Zealand

6 Nov

STL08:30Lambert-St Louis

33h 05m

2 stops

SYD10:35Sydney Kingsford Smith

20 Nov

SYD07:30Sydney Kingsford Smith

31h 56m

2 stops

STL22:26Lambert-St Louis

$1,995

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

13:20-09:35

2 stops27h 15m

Sydney Kingsford Smith

Sat 20/3

10:20-15:26

2 stops45h 06m

$1,553

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 8/3

16:05-09:35

1 stop48h 30m

Sydney Kingsford Smith

Sat 20/3

10:20-15:26

2 stops45h 06m

$1,558

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sat 7/11

16:05-09:35

2 stops48h 30m

Sydney Kingsford Smith

Wed 11/11

11:20-12:10

3 stops41h 50m

$1,701

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sat 7/11

17:34-09:35

3 stops47h 01m

Sydney Kingsford Smith

Wed 11/11

11:20-12:10

3 stops41h 50m

$1,715

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sat 7/11

16:05-09:35

2 stops48h 30m

Sydney Kingsford Smith

Wed 11/11

11:20-15:26

2 stops45h 06m

$1,719

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Thu 14/1

09:05-06:55

2 stops28h 50m

Sydney Kingsford Smith

Mon 1/2

11:20-15:26

2 stops45h 06m

$1,741

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 29/1

12:53-06:25

2 stops24h 32m

Sydney Kingsford Smith

Sat 15/5

09:10-19:30

3 stops25h 20m

$1,772

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 29/1

12:53-06:25

2 stops24h 32m

Sydney Kingsford Smith

Sat 15/5

09:10-19:30

3 stops25h 20m

$1,774

Fastest return journey

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sun 24/1

15:45-06:55

1 stop22h 10m

Sydney Kingsford Smith

Sat 6/2

11:05-20:01

3 stops25h 56m

$1,775

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 8/3

19:50-06:25

3 stops41h 35m

Sydney Kingsford Smith

Sat 20/3

06:05-13:39

2 stops23h 34m

$1,781

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 $2,007 to $2,547.
The lowest price recently found on this route was $1,553.

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 $1,747. 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 $1,868.

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	$1,045
Fastest flight time	26h 08m
Direct flights	None

The best one-way flight to Sydney from St. Louis in the past 72 hours is $1,045. The best return flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,553.

The fastest flight from St. Louis to Sydney takes 26h 08m

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 26h 08m.
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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Why should I use momondo to find a flight deal from St. Louis to Sydney?

It is quick and easy to find St. Louis to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.

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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momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Sydney.

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If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from St. Louis and alert you when they change.