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.

$1,026 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.

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

$1,528Qantas 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 - 23:56SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 36m1 stop Los Angeles

$1,725Qantas Airways

Mon, 8 Mar - Sat, 20 Mar

14:28 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

22h 57m2 stops Phoenix Sky Harbor Intl Los Angeles

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

24h 36m2 stops Brisbane Dallas/Fort Worth

$1,772Multiple Airlines

Fri, 5 Feb - Sat, 20 Feb

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

41h 23m3 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl Los Angeles

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

23h 36m2 stops Brisbane Dallas/Fort Worth

$1,773Multiple Airlines

Mon, 8 Mar - Sat, 20 Mar

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

41h 23m3 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl Los Angeles

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

23h 36m2 stops Brisbane Dallas/Fort Worth

$1,775Multiple Airlines

Mon, 8 Mar - Sat, 20 Mar

15:45 - 11:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 20m2 stops Dallas/Fort Worth Brisbane

12:00 - 17:21SYD Sydney Kingsford Smith-STL Lambert-St Louis

20h 21m1 stop Dallas/Fort Worth

$1,788Qantas Airways

Fri, 29 Jan - Sat, 15 May

06:01 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 24m1 stop Los Angeles

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

24h 36m2 stops Brisbane Dallas/Fort Worth

$1,792Qantas Airways

Fri, 5 Feb - Sat, 20 Feb

18:00 - 11:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 05m2 stops Dallas/Fort Worth Brisbane

10:20 - 17:21SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 01m2 stops Los Angeles Dallas/Fort Worth

$1,815Multiple Airlines

Fri, 29 Jan - Sat, 15 May

15:45 - 16:10STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 25m2 stops Dallas/Fort Worth Brisbane

09:10 - 23:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 49m1 stop Los Angeles

$1,823Qantas Airways

Fri, 29 Jan - Sat, 15 May

09:41 - 06:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 44m3 stops Dallas/Fort Worth Phoenix Sky Harbor Intl Los Angeles

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

24h 36m2 stops Brisbane Dallas/Fort Worth

$1,829Multiple Airlines

Fri, 5 Feb - Sat, 20 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

14:54 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 01m1 stop Dallas/Fort Worth

07:00 - 18:16SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 16m2 stops Melbourne Dallas/Fort Worth

$2,610Qantas Airways

Mon, 9 Nov - Thu, 12 Nov

14:54 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 01m1 stop Dallas/Fort Worth

11:10 - 20:42SYD Sydney Kingsford Smith-STL Lambert-St Louis

26h 32m1 stop Los Angeles

$2,650Qantas Airways

Mon, 9 Nov - Thu, 12 Nov

08:10 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 50m1 stop Los Angeles

14:05 - 18:16SYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 11m1 stop Dallas/Fort Worth

$2,673Qantas Airways

Mon, 9 Nov - Thu, 12 Nov

08:10 - 09:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 50m1 stop Los Angeles

11:05 - 20:42SYD Sydney Kingsford Smith-STL Lambert-St Louis

26h 37m2 stops Brisbane Los Angeles

$2,821Qantas Airways

Mon, 9 Nov - Thu, 12 Nov

07:30 - 19:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

66h 55m3 stops Chicago O'Hare Intl Istanbul Singapore Changi

21:35 - 21:40SYD Sydney Kingsford Smith-STL Lambert-St Louis

65h 05m3 stops Singapore Changi Istanbul Chicago O'Hare Intl

$2,873Turkish Airlines

Mon, 9 Nov - Thu, 12 Nov

13:40 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 55m2 stops Denver Intl Vancouver Intl

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

45h 06m2 stops Vancouver Intl Toronto Pearson Intl

$2,945Air Canada

Mon, 9 Nov - Thu, 12 Nov

09:40 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

30h 55m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vancouver Intl

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

45h 06m2 stops Vancouver Intl Toronto Pearson Intl

$2,957Air Canada

Mon, 9 Nov - Thu, 12 Nov

09:40 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

30h 55m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vancouver Intl

11:20 - 23:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

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

$2,971Air Canada

Mon, 9 Nov - Thu, 12 Nov

09:40 - 09:35STL Lambert-St Louis-SYD Sydney Kingsford Smith

30h 55m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vancouver Intl

11:20 - 23:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

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

$2,972Air Canada

Mon, 9 Nov - Thu, 12 Nov

07:30 - 19:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

66h 55m3 stops Chicago O'Hare Intl Istanbul Singapore Changi

21:35 - 21:40SYD Sydney Kingsford Smith-STL Lambert-St Louis

65h 05m3 stops Singapore Changi Istanbul Chicago O'Hare Intl

$3,065Turkish Airlines

Mon, 9 Nov - Thu, 12 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

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

$1,528

Qantas Airways

8 Mar

STL14:23Lambert-St Louis

31h 27m

2 stops

SYD14:50Sydney Kingsford Smith

20 Mar

SYD11:20Sydney Kingsford Smith

28h 36m

1 stop

STL23:56Lambert-St Louis

$1,725

Qantas Airways

29 Jan

STL15:45Lambert-St Louis

26h 20m

2 stops

SYD11:05Sydney Kingsford Smith

15 May

SYD12:00Sydney Kingsford Smith

20h 21m

1 stop

STL17:21Lambert-St Louis

$1,788

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

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

$1,870

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

$1,872

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

$1,873

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

$1,528

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

11:20-23:56

1 stop28h 36m

$1,725

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 5/2

14:28-06:25

2 stops22h 57m

Sydney Kingsford Smith

Sat 20/2

06:05-13:41

2 stops24h 36m

$1,772

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

$1,773

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

$1,775

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 29/1

15:45-11:05

2 stops26h 20m

Sydney Kingsford Smith

Sat 15/5

12:00-17:21

1 stop20h 21m

$1,788

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 5/2

06:01-06:25

1 stop31h 24m

Sydney Kingsford Smith

Sat 20/2

06:05-13:41

2 stops24h 36m

$1,792

Fastest return journey

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 29/1

18:00-11:05

2 stops24h 05m

Sydney Kingsford Smith

Sat 15/5

10:20-17:21

2 stops22h 01m

$1,815

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 29/1

15:45-16:10

2 stops31h 25m

Sydney Kingsford Smith

Sat 15/5

09:10-23:59

1 stop29h 49m

$1,823

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 5/2

09:41-06:25

3 stops27h 44m

Sydney Kingsford Smith

Sat 20/2

06:05-13:41

2 stops24h 36m

$1,829

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

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 $1,959 to $2,662.
The lowest price recently found on this route was $1,528.

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 $1,738. If you aren’t able to travel to Sydney during the month of March, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,825.

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	$1,026
Fastest flight time	22h 57m
Direct flights	None

The best one-way flight to Sydney from St. Louis in the past 72 hours is $1,026. The best return flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,528.

The fastest flight from St. Louis to Sydney takes 22h 57m

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 22h 57m.
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.

How can momondo help me find flights from St. Louis to Sydney?

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.