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

United Airlines 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.

$975 Cheap Flights from St. Louis to Sydney in 2026

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.

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

28h 35m2 stops Houston George Bush Intcntl Auckland Intl

19:25 - 22:06SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 41m2 stops Auckland Intl Houston George Bush Intcntl

$1,817Air New Zealand

Sun, 22 Nov - Mon, 30 Nov

15:12 - 21:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

38h 38m2 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

$1,818Air New Zealand

Tue, 13 Oct - Fri, 13 Nov

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

32h 35m2 stops San Francisco Auckland Intl

19:25 - 23:15SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 50m2 stops Auckland Intl San Francisco

$1,818Air New Zealand

Sun, 25 Oct - Sat, 31 Oct

12:17 - 22:25STL Lambert-St Louis-SYD Sydney Kingsford Smith

43h 08m3 stops Las Vegas Harry Reid Intl Los Angeles Los Angeles Nadi

14:15 - 23:13SYD Sydney Kingsford Smith-STL Lambert-St Louis

48h 58m3 stops Nadi Los Angeles Los Angeles Orlando

$1,826Multiple Airlines

Wed, 30 Sep - Wed, 7 Oct

15:32 - 07:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 28m2 stops Chicago O'Hare Intl Los Angeles Los Angeles

11:20 - 18:43SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 23m1 stop San Francisco

$1,858United Airlines

Wed, 23 Sep - Wed, 7 Oct

11:35 - 07:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

28h 25m2 stops Chicago O'Hare Intl Los Angeles Los Angeles

11:20 - 18:43SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 23m1 stop San Francisco

$1,858United Airlines

Wed, 30 Sep - Wed, 7 Oct

10:29 - 06:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

29h 21m2 stops Detroit Metropolitan Wayne County Los Angeles Los Angeles

10:15 - 17:44SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 29m2 stops Los Angeles Los Angeles Salt Lake City

$1,858Delta

Wed, 30 Sep - Wed, 7 Oct

14:30 - 06:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 20m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

10:15 - 23:54SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 39m2 stops Los Angeles Los Angeles Atlanta Hartsfield-Jackson

$1,858Delta

Wed, 23 Sep - Wed, 7 Oct

16:40 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 15m2 stops Denver Intl San Francisco

10:30 - 20:16SYD Sydney Kingsford Smith-STL Lambert-St Louis

25h 46m2 stops Los Angeles Los Angeles Houston George Bush Intcntl

$1,858United Airlines

Wed, 23 Sep - Wed, 7 Oct

10:31 - 07:50STL Lambert-St Louis-SYD Sydney Kingsford Smith

29h 19m2 stops Detroit Metropolitan Wayne County Los Angeles Los Angeles

10:40 - 20:51SYD Sydney Kingsford Smith-STL Lambert-St Louis

27h 11m2 stops Los Angeles Los Angeles Detroit Metropolitan Wayne County

$1,858Delta

Tue, 13 Oct - Wed, 18 Nov

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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

13 Oct

STL15:12Lambert-St Louis

38h 38m

2 stops

SYD21:50Sydney Kingsford Smith

13 Nov

SYD09:55Sydney Kingsford Smith

29h 31m

2 stops

STL22:26Lambert-St Louis

$1,818

Air New Zealand

9 Sept

STL08:35Lambert-St Louis

46h 15m

2 stops

SYD21:50Sydney Kingsford Smith

16 Sept

SYD19:20Sydney Kingsford Smith

42h 10m

2 stops

STL22:30Lambert-St Louis

$1,987

Air New Zealand

11 Sept

STL15:13Lambert-St Louis

26h 32m

2 stops

SYD08:45Sydney Kingsford Smith

10 Oct

SYD11:55Sydney Kingsford Smith

24h 21m

2 stops

STL20:16Lambert-St Louis

$2,003

Qantas Airways flights from St. Louis to Sydney

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

Qantas Airways

8 Nov

STL14:54Lambert-St Louis

23h 01m

1 stop

SYD06:55Sydney Kingsford Smith

11 Nov

SYD09:55Sydney Kingsford Smith

30h 50m

2 stops

STL23:45Lambert-St Louis

$1,931

Qantas Airways

4 Oct

STL06:00Lambert-St Louis

34h 05m

1 stop

SYD08:05Sydney Kingsford Smith

11 Oct

SYD13:00Sydney Kingsford Smith

21h 20m

1 stop

STL18:20Lambert-St Louis

$1,971

Qantas Airways

18 Sept

STL06:30Lambert-St Louis

33h 35m

1 stop

SYD07:05Sydney Kingsford Smith

7 Oct

SYD18:50Sydney Kingsford Smith

20h 56m

1 stop

STL23:46Lambert-St Louis

$1,973

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

Sun 22/11

11:00-08:35

2 stops28h 35m

Sydney Kingsford Smith

Mon 30/11

19:25-22:06

2 stops43h 41m

$1,817

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 13/10

15:12-21:50

2 stops38h 38m

Sydney Kingsford Smith

Fri 13/11

09:55-22:26

2 stops29h 31m

$1,818

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sun 25/10

08:00-08:35

2 stops32h 35m

Sydney Kingsford Smith

Sat 31/10

19:25-23:15

2 stops43h 50m

$1,818

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 30/9

12:17-22:25

3 stops43h 08m

Sydney Kingsford Smith

Wed 7/10

14:15-23:13

3 stops48h 58m

$1,826

Fastest return journey

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 23/9

15:32-07:00

2 stops24h 28m

Sydney Kingsford Smith

Wed 7/10

11:20-18:43

1 stop23h 23m

$1,858

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 30/9

11:35-07:00

2 stops28h 25m

Sydney Kingsford Smith

Wed 7/10

11:20-18:43

1 stop23h 23m

$1,858

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 30/9

10:29-06:50

2 stops29h 21m

Sydney Kingsford Smith

Wed 7/10

10:15-17:44

2 stops23h 29m

$1,858

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 23/9

14:30-06:50

2 stops25h 20m

Sydney Kingsford Smith

Wed 7/10

10:15-23:54

2 stops29h 39m

$1,858

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Wed 23/9

16:40-06:55

2 stops23h 15m

Sydney Kingsford Smith

Wed 7/10

10:30-20:16

2 stops25h 46m

$1,858

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Tue 13/10

10:31-07:50

2 stops29h 19m

Sydney Kingsford Smith

Wed 18/11

10:40-20:51

2 stops27h 11m

$1,858

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 $1,837 to $2,127.
The lowest price recently found on this route was $1,818.

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 $1,619. 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 $1,699.

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

Best price found	$975
Fastest flight time	23h 01m
Direct flights	None

The best one-way flight to Sydney from St. Louis in the past 72 hours is $975. The best return flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,817.

The fastest flight from St. Louis to Sydney takes 23h 01m

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 01m.
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.

Parramatta

Wollongong

Terrigal

Katoomba

Penrith

Lithgow

Coogee

Manly

Leura

Randwick

Cronulla

Bondi Beach

Charlestown

Swansea

Newport

Why use momondo?

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.

I’m not ready to book a flight from St. Louis to Sydney right now. Can momondo alert me if prices change?

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.