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.

$1,470 Cheap Flights from St. Louis to Sydney (STL-SYD) in 2025

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

Prices are currently typical for flights on this route. Typical prices usually range from $1,461 to $2,111. The lowest price recently found on this route was $1,470.

1 adult

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Find the cheapest flights from St. Louis to Sydney (STL-SYD)

Round-trip

One-way

Last minute

Cheap return flights

16:05 - 09:35STL-SYD

48h 30m2 stops

11:20 - 15:29SYD-STL

45h 09m2 stops

$1,470Air Canada

Find Deal

Wed, 5 Nov - Wed, 19 Nov

16:05 - 08:35STL-SYD

48h 30m2 stops

11:20 - 15:29SYD-STL

45h 09m2 stops

$1,565Air Canada

Find Deal

Wed, 29 Oct - Sat, 15 Nov

16:05 - 09:35STL-SYD

48h 30m2 stops

11:20 - 15:29SYD-STL

45h 09m2 stops

$1,609Air Canada

Find Deal

Sat, 15 Nov - Sat, 22 Nov

18:13 - 11:35STL-SYD

24h 22m2 stops

14:20 - 19:30SYD-STL

22h 10m1 stop

$1,655Qantas Airways

Find Deal

Sun, 2 Nov - Sun, 9 Nov

15:59 - 06:55STL-SYD

21h 56m1 stop

17:30 - 23:42SYD-STL

23h 12m2 stops

$1,663Qantas Airways

Find Deal

Tue, 4 Nov - Tue, 11 Nov

06:15 - 08:45STL-SYD

33h 30m2 stops

09:55 - 21:58SYD-STL

29h 03m2 stops

$1,929Air New Zealand

Find Deal

Fri, 28 Nov - Sun, 14 Dec

14:31 - 06:35STL-SYD

25h 04m2 stops

10:25 - 23:09SYD-STL

28h 44m2 stops

$1,959Delta

Find Deal

Sun, 28 Sep - Sun, 5 Oct

06:39 - 09:00STL-SYD

34h 21m1 stop

11:20 - 15:29SYD-STL

45h 09m2 stops

$1,968

Find Deal

Wed, 29 Oct - Sat, 15 Nov

17:30 - 06:35STL-SYD

46h 05m2 stops

09:25 - 17:47SYD-STL

23h 22m2 stops

$1,985Delta

Find Deal

Sat, 23 Aug - Wed, 27 Aug

13:35 - 08:45STL-SYD

26h 10m3 stops

09:55 - 18:47SYD-STL

25h 52m2 stops

$2,007

Find Deal

Wed, 5 Nov - Sun, 23 Nov

Air Canada flights from St. Louis to Sydney

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

Air Canada

5 Nov

STL16:05Lambert-St Louis

48h 30m

2 stops

SYD09:35Sydney Kingsford Smith

19 Nov

SYD11:20Sydney Kingsford Smith

45h 09m

2 stops

STL15:29Lambert-St Louis

$1,470

Find similar

Air Canada

29 Oct

STL16:05Lambert-St Louis

48h 30m

2 stops

SYD08:35Sydney Kingsford Smith

15 Nov

SYD11:20Sydney Kingsford Smith

45h 09m

2 stops

STL15:29Lambert-St Louis

$1,565

Find similar

Air Canada

15 Nov

STL16:05Lambert-St Louis

48h 30m

2 stops

SYD09:35Sydney Kingsford Smith

22 Nov

SYD11:20Sydney Kingsford Smith

45h 09m

2 stops

STL15:29Lambert-St Louis

$1,609

Find similar

Qantas Airways flights from St. Louis to Sydney

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

Qantas Airways

2 Nov

STL18:13Lambert-St Louis

24h 22m

2 stops

SYD11:35Sydney Kingsford Smith

9 Nov

SYD14:20Sydney Kingsford Smith

22h 10m

1 stop

STL19:30Lambert-St Louis

$1,655

Find similar

Qantas Airways

4 Nov

STL15:59Lambert-St Louis

21h 56m

1 stop

SYD06:55Sydney Kingsford Smith

11 Nov

SYD17:30Sydney Kingsford Smith

23h 12m

2 stops

STL23:42Lambert-St Louis

$1,663

Find similar

Qantas Airways

28 Nov

STL16:07Lambert-St Louis

21h 48m

1 stop

SYD06:55Sydney Kingsford Smith

14 Dec

SYD06:05Sydney Kingsford Smith

27h 02m

2 stops

STL16:07Lambert-St Louis

$1,669

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 5/11

16:05-09:35

2 stops48h 30m

Sydney Kingsford Smith

Wed 19/11

11:20-15:29

2 stops45h 09m

$1,470

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 29/10

16:05-08:35

2 stops48h 30m

Sydney Kingsford Smith

Sat 15/11

11:20-15:29

2 stops45h 09m

$1,565

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 15/11

16:05-09:35

2 stops48h 30m

Sydney Kingsford Smith

Sat 22/11

11:20-15:29

2 stops45h 09m

$1,609

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 2/11

18:13-11:35

2 stops24h 22m

Sydney Kingsford Smith

Sun 9/11

14:20-19:30

1 stop22h 10m

$1,655

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 4/11

15:59-06:55

1 stop21h 56m

Sydney Kingsford Smith

Tue 11/11

17:30-23:42

2 stops23h 12m

$1,663

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 28/11

06:15-08:45

2 stops33h 30m

Sydney Kingsford Smith

Sun 14/12

09:55-21:58

2 stops29h 03m

$1,929

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 28/9

14:31-06:35

2 stops25h 04m

Sydney Kingsford Smith

Sun 5/10

10:25-23:09

2 stops28h 44m

$1,959

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 29/10

06:39-09:00

1 stop34h 21m

Sydney Kingsford Smith

Sat 15/11

11:20-15:29

2 stops45h 09m

$1,968

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 23/8

17:30-06:35

2 stops46h 05m

Sydney Kingsford Smith

Wed 27/8

09:25-17:47

2 stops23h 22m

$1,985

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 5/11

13:35-08:45

3 stops26h 10m

Sydney Kingsford Smith

Sun 23/11

09:55-18:47

2 stops25h 52m

$2,007

Flights are sorted by cheapest return flights first.

Sorted 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?

What is the cheapest month to fly to Sydney?

The month of August is, on average, the cheapest month to fly to Sydney from St. Louis, with most prices found around $1,921. If you aren’t able to travel to Sydney during the month of August, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $2,094.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the afternoon. momondo users have found flights departing from St. Louis to Sydney in the afternoon for as low as $1,915. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $2,696 on average. Flights to Sydney from St. Louis in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,239 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from St. Louis for as low as $1,944 on momondo.

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	$1,470
Fastest flight time	21h 48m
Direct flights	None
Airports in Sydney	1 airport

The best flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,470

The fastest flight from St. Louis to Sydney takes 21h 48m

There are no direct flights from St. Louis to Sydney. Popular non-direct route for this connection is Lambert-St Louis Airport - Sydney Kingsford Smith Airport.

There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

Search flight deals

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 21h 48m.
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 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.