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

Qantas Airways and United Airlines 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.

$909 Cheap Flights from St. Louis to Sydney in 2026

Find the cheapest flights from St. Louis to Sydney

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11:00 - 08:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

28h 35m2 stops Houston George Bush Intcntl Auckland Intl

09:55 - 22:06SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 11m2 stops Auckland Intl Houston George Bush Intcntl

$1,749Air New Zealand

Tue, 2 Feb - Tue, 9 Feb

11:55 - 14:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

33h 55m2 stops Dallas/Fort Worth Auckland Intl

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

19h 09m1 stop Dallas/Fort Worth

$1,759Qantas Airways

Tue, 2 Feb - Tue, 9 Feb

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

27h 40m2 stops Houston George Bush Intcntl Auckland Intl

19:25 - 22:26SYD Sydney Kingsford Smith-STL Lambert-St Louis

44h 01m2 stops Auckland Intl Houston George Bush Intcntl

$1,778Air New Zealand

Mon, 26 Oct - Sat, 14 Nov

15:12 - 08:45STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 33m2 stops Houston George Bush Intcntl Auckland Intl

09:55 - 22:26SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 31m2 stops Auckland Intl Houston George Bush Intcntl

$1,817Air New Zealand

Tue, 13 Oct - Fri, 13 Nov

17:04 - 20:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 46m2 stops Dallas/Fort Worth Auckland Intl

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

29h 39m1 stop Los Angeles Los Angeles

$1,826Qantas Airways

Wed, 3 Feb - Wed, 10 Feb

06:15 - 10:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

35h 20m2 stops Houston George Bush Intcntl Auckland Intl

09:55 - 22:06SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 11m2 stops Auckland Intl Houston George Bush Intcntl

$1,833Air New Zealand

Tue, 12 Jan - Tue, 26 Jan

08:30 - 10:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m2 stops Houston George Bush Intcntl Auckland Intl

19:25 - 22:15SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 50m2 stops Auckland Intl San Francisco

$1,846Air New Zealand

Mon, 26 Oct - Sat, 14 Nov

17:04 - 11:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 01m2 stops Dallas/Fort Worth Brisbane

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

19h 09m1 stop Dallas/Fort Worth

$1,857Qantas Airways

Mon, 1 Feb - Mon, 8 Feb

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

22h 55m1 stop Dallas/Fort Worth

13:00 - 18:20SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 20m1 stop Dallas/Fort Worth

$1,859Qantas Airways

Wed, 23 Sep - Wed, 7 Oct

19:05 - 09:40STL Lambert-St Louis-SYD Sydney Kingsford Smith

45h 35m2 stops San Francisco Brisbane

09:15 - 18:38SYD Sydney Kingsford Smith-STL Lambert-St Louis

26h 23m1 stop Houston George Bush Intcntl

$1,870United Airlines

Sat, 14 Nov - Wed, 18 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:00 - 07:30STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 30m1 stop Los Angeles Los Angeles

09:10 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 49m1 stop Los Angeles Los Angeles

$1,951Qantas Airways

Mon, 17 Aug - Mon, 31 Aug

13:36 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 19m2 stops Denver Intl San Francisco

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

38h 50m2 stops San Francisco Houston George Bush Intcntl

$2,014United Airlines

Mon, 17 Aug - Mon, 31 Aug

06:00 - 10:30STL Lambert-St Louis-SYD Sydney Kingsford Smith

37h 30m2 stops Los Angeles Los Angeles Melbourne

09:10 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 49m1 stop Los Angeles Los Angeles

$2,098Qantas Airways

Mon, 17 Aug - Mon, 31 Aug

11:00 - 06:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

28h 50m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

09:15 - 22:03SYD Sydney Kingsford Smith-STL Lambert-St Louis

27h 48m2 stops Los Angeles Los Angeles Minneapolis St Paul

$2,410Delta

Mon, 17 Aug - Sat, 22 Aug

12:10 - 07:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

52h 10m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Vancouver Intl

09:20 - 18:42SYD Sydney Kingsford Smith-STL Lambert-St Louis

48h 22m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$2,424Air Canada

Mon, 17 Aug - Sat, 22 Aug

06:00 - 07:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m1 stop Los Angeles Los Angeles

09:10 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 49m1 stop Los Angeles Los Angeles

$2,425Qantas Airways

Mon, 17 Aug - Sat, 22 Aug

11:15 - 08:45STL Lambert-St Louis-SYD Sydney Kingsford Smith

30h 30m2 stops Houston George Bush Intcntl Auckland Intl

11:55 - 10:10SYD Sydney Kingsford Smith-STL Lambert-St Louis

37h 15m2 stops Auckland Intl Houston George Bush Intcntl

$2,499Air New Zealand

Thu, 13 Aug - Sat, 15 Aug

08:42 - 08:45STL Lambert-St Louis-SYD Sydney Kingsford Smith

33h 03m2 stops San Francisco Auckland Intl

10:20 - 15:38SYD Sydney Kingsford Smith-STL Lambert-St Louis

44h 18m1 stop San Francisco

$2,502Air New Zealand

Mon, 17 Aug - Sat, 22 Aug

06:00 - 07:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m1 stop Los Angeles Los Angeles

09:10 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 49m1 stop Los Angeles Los Angeles

$2,560Qantas Airways

Thu, 13 Aug - Sat, 15 Aug

06:15 - 08:45STL Lambert-St Louis-SYD Sydney Kingsford Smith

35h 30m2 stops Houston George Bush Intcntl Auckland Intl

11:55 - 10:10SYD Sydney Kingsford Smith-STL Lambert-St Louis

37h 15m2 stops Auckland Intl Houston George Bush Intcntl

$2,649Air New Zealand

Thu, 13 Aug - Sat, 15 Aug

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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

2 Feb

STL11:00Lambert-St Louis

28h 35m

2 stops

SYD08:35Sydney Kingsford Smith

9 Feb

SYD09:55Sydney Kingsford Smith

29h 11m

2 stops

STL22:06Lambert-St Louis

$1,749

Air New Zealand

26 Oct

STL14:55Lambert-St Louis

27h 40m

2 stops

SYD10:35Sydney Kingsford Smith

14 Nov

SYD19:25Sydney Kingsford Smith

44h 01m

2 stops

STL22:26Lambert-St Louis

$1,778

Air New Zealand

13 Oct

STL15:12Lambert-St Louis

25h 33m

2 stops

SYD08:45Sydney Kingsford Smith

13 Nov

SYD09:55Sydney Kingsford Smith

29h 31m

2 stops

STL22:26Lambert-St Louis

$1,817

Air Canada flights from St. Louis to Sydney

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

Air Canada

30 Sept

STL12:10Lambert-St Louis

52h 10m

2 stops

SYD07:20Sydney Kingsford Smith

5 Oct

SYD10:20Sydney Kingsford Smith

48h 21m

2 stops

STL18:41Lambert-St Louis

$1,987

Air Canada

13 Oct

STL16:39Lambert-St Louis

23h 41m

2 stops

SYD08:20Sydney Kingsford Smith

13 Nov

SYD11:20Sydney Kingsford Smith

41h 52m

3 stops

STL12:12Lambert-St Louis

$1,992

Air Canada

1 Oct

STL08:55Lambert-St Louis

31h 25m

2 stops

SYD07:20Sydney Kingsford Smith

5 Oct

SYD10:20Sydney Kingsford Smith

48h 21m

2 stops

STL18:41Lambert-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

Tue 2/2

11:00-08:35

2 stops28h 35m

Sydney Kingsford Smith

Tue 9/2

09:55-22:06

2 stops29h 11m

$1,749

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 2/2

11:55-14:50

2 stops33h 55m

Sydney Kingsford Smith

Tue 9/2

14:05-16:14

1 stop19h 09m

$1,759

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 26/10

14:55-10:35

2 stops27h 40m

Sydney Kingsford Smith

Sat 14/11

19:25-22:26

2 stops44h 01m

$1,778

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 13/10

15:12-08:45

2 stops25h 33m

Sydney Kingsford Smith

Fri 13/11

09:55-22:26

2 stops29h 31m

$1,817

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 3/2

17:04-20:50

2 stops34h 46m

Sydney Kingsford Smith

Wed 10/2

11:20-23:59

1 stop29h 39m

$1,826

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 12/1

06:15-10:35

2 stops35h 20m

Sydney Kingsford Smith

Tue 26/1

09:55-22:06

2 stops29h 11m

$1,833

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 26/10

08:30-10:35

2 stops34h 05m

Sydney Kingsford Smith

Sat 14/11

19:25-22:15

2 stops43h 50m

$1,846

Fastest return journey

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 1/2

17:04-11:05

2 stops25h 01m

Sydney Kingsford Smith

Mon 8/2

14:05-16:14

1 stop19h 09m

$1,857

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 23/9

17:00-06:55

1 stop22h 55m

Sydney Kingsford Smith

Wed 7/10

13:00-18:20

1 stop21h 20m

$1,859

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sat 14/11

19:05-09:40

2 stops45h 35m

Sydney Kingsford Smith

Wed 18/11

09:15-18:38

1 stop26h 23m

$1,870

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 $1,861 to $2,201.
The lowest price recently found on this route was $1,749.

What is the cheapest month to fly to Sydney?

The month of July is, on average, the cheapest month to fly to Sydney from St. Louis, with most prices found around $1,645. If you aren’t able to travel to Sydney during the month of July, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,727.

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

You could potentially save up to 19% on your flight if you consider stops on a St. Louis to Sydney flight.

How have St. Louis to Sydney flight prices changed over time?

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

Fastest flight time	24h 21m
Direct flights	None

The fastest flight from St. Louis to Sydney takes 24h 21m

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 24h 21m.
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.