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Cheap flights from St. Louis to Sydney from $1,262

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sydney departing on 25/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Sydney

Cheap return flights

These are some of the best return flight deals from St. Louis to Sydney that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Sydney.

Cheap last-minute flights

Planning a quick getaway from St. Louis to Sydney? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Sydney, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from St. Louis to Sydney

Find recent round-trip train or bus tickets from St. Louis to Sydney.

All round-trip flight deals to Sydney

The cheapest plane tickets to Sydney found on KAYAK recently.
15:50 - 09:35STL-SYD
48h 45m2 stops
10:20 - 15:06SYD-STL
44h 46m2 stops
$1,700Air Canada
Find Deal
Mon, 3 Mar - Thu, 13 Mar
15:50 - 07:20STL-SYD
48h 30m2 stops
09:20 - 15:06SYD-STL
44h 46m2 stops
$1,876Air Canada
Find Deal
Mon, 21 Apr - Sun, 27 Apr
16:36 - 06:20STL-SYD
44h 44m2 stops
12:10 - 16:31SYD-STL
21h 21m2 stops
$1,890United Airlines
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Tue, 21 Jan - Sat, 1 Feb
06:03 - 12:30STL-SYD
37h 27m2 stops
13:45 - 22:27SYD-STL
23h 42m2 stops
$2,166
Find Deal
Mon, 10 Feb - Sat, 28 Jun
18:00 - 07:00STL-SYD
22h 00m1 stop
10:20 - 00:27SYD-STL
29h 07m1 stop
$2,212United Airlines
Find Deal
Fri, 25 Apr - Wed, 7 May
18:00 - 07:00STL-SYD
22h 00m1 stop
18:20 - 20:21SYD-STL
41h 01m2 stops
$2,364Air New Zealand
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Mon, 21 Apr - Sun, 27 Apr
11:30 - 12:40STL-SYD
32h 10m3 stops
11:45 - 18:59SYD-STL
24h 14m2 stops
$2,480
Find Deal
Tue, 21 Jan - Sat, 1 Feb
06:10 - 09:00STL-SYD
33h 50m1 stop
11:15 - 23:50SYD-STL
28h 35m1 stop
$2,685Qantas Airways
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Mon, 3 Mar - Thu, 13 Mar
10:55 - 08:45STL-SYD
28h 50m2 stops
12:10 - 16:53SYD-STL
21h 43m1 stop
$2,750Air New Zealand
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Wed, 5 Mar - Sun, 9 Mar
06:03 - 09:00STL-SYD
33h 57m1 stop
11:15 - 23:03SYD-STL
28h 48m1 stop
$3,078Qantas Airways
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Tue, 21 Jan - Fri, 31 Jan
18:49 - 13:00STL-SYD
49h 11m3 stops
$1,262
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Wed, 25 Dec
15:50 - 06:55STL-SYD
46h 05m2 stops
$1,336Air Canada
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Wed, 25 Dec
17:40 - 07:00STL-SYD
44h 20m2 stops
$1,562United Airlines
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Sat, 23 Nov
19:00 - 09:15STL-SYD
21h 15m1 stop
$1,655United Airlines
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Sat, 23 Nov
15:50 - 09:35STL-SYD
48h 45m2 stops
$1,963Air Canada
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Thu, 26 Dec
08:50 - 06:10STL-SYD
28h 20m1 stop
$2,108
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Wed, 25 Dec
13:45 - 06:35STL-SYD
23h 50m1 stop
$2,546American Airlines
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Thu, 26 Dec
11:51 - 07:25STL-SYD
26h 34m3 stops
$2,710
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Sat, 23 Nov
15:50 - 20:35STL-SYD
35h 45m3 stops
$3,228
Find Deal
Thu, 26 Dec
07:09 - 09:15STL-SYD
33h 06m1 stop
19:15 - 20:57SYD-STL
42h 42m2 stops
$2,930Air New Zealand
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Wed, 20 Nov - Fri, 22 Nov
16:54 - 09:05STL-SYD
23h 11m2 stops
13:55 - 00:16SYD-STL
27h 21m2 stops
$3,044Air New Zealand
Find Deal
Wed, 20 Nov - Fri, 22 Nov
16:54 - 09:05STL-SYD
23h 11m2 stops
11:45 - 00:16SYD-STL
29h 31m2 stops
$3,412Air New Zealand
Find Deal
Thu, 21 Nov - Sat, 23 Nov
19:00 - 09:15STL-SYD
21h 15m1 stop
19:15 - 20:57SYD-STL
42h 42m2 stops
$3,483Air New Zealand
Find Deal
Thu, 21 Nov - Sat, 23 Nov
09:20 - 18:50STL-SYD
40h 30m2 stops
21:40 - 08:43SYD-STL
52h 03m2 stops
$3,708Qatar Airways
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Thu, 21 Nov - Sat, 23 Nov
17:31 - 06:35STL-SYD
20h 04m1 stop
17:25 - 23:57SYD-STL
23h 32m1 stop
$3,805Qantas Airways
Find Deal
Wed, 20 Nov - Fri, 22 Nov
16:03 - 06:35STL-SYD
21h 32m1 stop
17:25 - 23:57SYD-STL
23h 32m1 stop
$3,872Qantas Airways
Find Deal
Thu, 21 Nov - Sat, 23 Nov
11:20 - 08:45STL-SYD
28h 25m3 stops
11:45 - 23:30SYD-STL
28h 45m3 stops
$4,176
Find Deal
Wed, 20 Nov - Fri, 22 Nov
08:40 - 08:45STL-SYD
31h 05m3 stops
11:45 - 20:57SYD-STL
26h 12m2 stops
$4,903
Find Deal
Thu, 21 Nov - Sat, 23 Nov
11:20 - 08:45STL-SYD
28h 25m3 stops
11:45 - 20:45SYD-STL
26h 00m3 stops
$4,911
Find Deal
Thu, 21 Nov - Sat, 23 Nov

Air Canada flights from St. Louis to Sydney

Our best Air Canada deals on St. Louis to Sydney flight tickets
Air Canada
3 Mar
STL15:50Lambert-St Louis
48h 45m
2 stops
SYD09:35Sydney Kingsford Smith
13 Mar
SYD10:20Sydney Kingsford Smith
44h 46m
2 stops
STL15:06Lambert-St Louis
Air Canada
21 Apr
STL15:50Lambert-St Louis
48h 30m
2 stops
SYD07:20Sydney Kingsford Smith
27 Apr
SYD09:20Sydney Kingsford Smith
44h 46m
2 stops
STL15:06Lambert-St Louis
Air Canada
10 Feb
STL15:50Lambert-St Louis
48h 45m
1 stop
SYD09:35Sydney Kingsford Smith
28 June
SYD09:20Sydney Kingsford Smith
45h 01m
2 stops
STL15:21Lambert-St Louis

United Airlines flights from St. Louis to Sydney

Our best United Airlines deals on St. Louis to Sydney flight tickets
United Airlines
21 Jan
STL16:36Lambert-St Louis
44h 44m
2 stops
SYD06:20Sydney Kingsford Smith
1 Feb
SYD12:10Sydney Kingsford Smith
21h 21m
2 stops
STL16:31Lambert-St Louis
United Airlines
25 Apr
STL18:00Lambert-St Louis
22h 00m
1 stop
SYD07:00Sydney Kingsford Smith
7 May
SYD10:20Sydney Kingsford Smith
29h 07m
1 stop
STL00:27Lambert-St Louis
United Airlines
25 Apr
STL18:00Lambert-St Louis
22h 00m
1 stop
SYD07:00Sydney Kingsford Smith
7 May
SYD09:30Sydney Kingsford Smith
28h 48m
2 stops
STL23:18Lambert-St Louis

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 from St. Louis to Sydney?

March. The cheapest time of year to fly to Sydney from St. Louis is March. The most expensive is December.

What is the cheapest day to depart St. Louis for Sydney?

Friday. The cheapest day of the week is usually Friday. The most expensive is usually Friday.

When is the cheapest time to fly from St. Louis to Sydney?

In the afternoon. St. Louis to Sydney flights are approximately 29% more expensive in the morning than in the afternoon

What is the cheapest St. Louis to Sydney flight route?

Lambert-St Louis - Sydney Kingsford Smith. Fly from Lambert-St Louis to Sydney Kingsford Smith for the best St. Louis - Sydney flight prices

How far in advance should you book St. Louis to Sydney flights?

60 days before. The cheapest time to buy a flight from St. Louis to Sydney is approximately 60 days to departure

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?

As of November 2024, prices for St. Louis to Sydney flights are approximately 91% more expensive when compared to flights at the same time last year.

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

$1,262

Fastest flight time

20h 04m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from St. Louis in the past 72 hours is $1,262. The best return flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,700.
The fastest flight from St. Louis to Sydney takes 20h 04m
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)

  • 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 20h 04m.

  • 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.


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.


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