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Cheap flights from St. Louis to Sydney from $901

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 25/2. 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 return train or bus tickets from St. Louis to Sydney.

All return flight deals from St. Louis to Sydney

The cheapest plane tickets from St. Louis to Sydney found on KAYAK recently.
17:12 - 12:30STL-SYD
26h 18m2 stops
06:15 - 19:29SYD-STL
30h 14m2 stops
$1,832Fiji Airways
Find Deal
Sat, 8 Feb - Thu, 27 Feb
15:50 - 09:35STL-SYD
48h 45m2 stops
09:20 - 15:16SYD-STL
44h 56m2 stops
$1,976Air Canada
Find Deal
Mon, 24 Feb - Sun, 24 Aug
06:15 - 09:00STL-SYD
33h 45m1 stop
11:15 - 23:09SYD-STL
27h 54m1 stop
$2,002American Airlines
Find Deal
Thu, 6 Mar - Thu, 13 Mar
06:15 - 09:00STL-SYD
33h 45m1 stop
11:15 - 17:59SYD-STL
22h 44m2 stops
$2,008American Airlines
Find Deal
Thu, 6 Mar - Thu, 13 Mar
13:45 - 09:00STL-SYD
26h 15m2 stops
11:15 - 23:08SYD-STL
28h 53m1 stop
$2,072American Airlines
Find Deal
Sat, 8 Feb - Thu, 27 Feb
13:03 - 07:00STL-SYD
24h 57m2 stops
10:20 - 17:03SYD-STL
21h 43m1 stop
$2,088United Airlines
Find Deal
Mon, 24 Feb - Sun, 24 Aug
13:30 - 07:20STL-SYD
50h 50m3 stops
09:20 - 15:16SYD-STL
44h 56m2 stops
$2,192Air Canada
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Thu, 3 Jul - Sun, 13 Jul
16:33 - 07:00STL-SYD
22h 27m1 stop
11:50 - 20:54SYD-STL
25h 04m1 stop
$2,488United Airlines
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Fri, 14 Mar - Sat, 22 Mar
17:33 - 19:00STL-SYD
56h 27m3 stops
21:00 - 15:31SYD-STL
58h 31m3 stops
$3,342Turkish Airlines
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Thu, 6 Mar - Thu, 13 Mar
17:30 - 19:00STL-SYD
56h 30m3 stops
21:00 - 15:40SYD-STL
59h 40m3 stops
$4,366Turkish Airlines
Find Deal
Sat, 8 Feb - Thu, 27 Feb
10:49 - 12:30STL-SYD
32h 41m2 stops
Tue, 25 Feb
15:50 - 09:35STL-SYD
48h 45m2 stops
$1,382Air Canada
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Wed, 19 Feb
06:10 - 12:30STL-SYD
37h 20m2 stops
$1,386
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Mon, 17 Feb
08:40 - 07:00STL-SYD
29h 20m1 stop
$1,491United Airlines
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Wed, 19 Feb
09:00 - 09:15STL-SYD
31h 15m1 stop
$1,646United Airlines
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Mon, 17 Feb
08:20 - 10:25STL-SYD
33h 05m3 stops
$1,757
Find Deal
Tue, 25 Feb
13:39 - 10:25STL-SYD
27h 46m3 stops
$1,965
Find Deal
Mon, 17 Feb
15:50 - 09:35STL-SYD
48h 45m2 stops
11:20 - 15:06SYD-STL
44h 46m2 stops
$2,675Air Canada
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Sat, 25 Jan - Fri, 31 Jan
07:00 - 09:15STL-SYD
33h 15m1 stop
19:15 - 09:55SYD-STL
55h 40m2 stops
$3,155Air New Zealand
Find Deal
Sat, 25 Jan - Fri, 31 Jan
06:15 - 08:45STL-SYD
33h 30m2 stops
12:10 - 18:09SYD-STL
22h 59m1 stop
$3,258Air New Zealand
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Sun, 26 Jan - Tue, 28 Jan
10:55 - 08:45STL-SYD
28h 50m2 stops
19:15 - 22:20SYD-STL
44h 05m2 stops
$3,306Air New Zealand
Find Deal
Sun, 26 Jan - Tue, 28 Jan
07:00 - 09:15STL-SYD
33h 15m1 stop
11:45 - 22:20SYD-STL
27h 35m2 stops
$3,334Air New Zealand
Find Deal
Sat, 25 Jan - Mon, 27 Jan
16:36 - 08:45STL-SYD
23h 09m2 stops
11:45 - 22:20SYD-STL
27h 35m3 stops
$3,504
Find Deal
Sun, 26 Jan - Tue, 28 Jan
09:44 - 10:25STL-SYD
31h 41m3 stops
13:55 - 22:20SYD-STL
25h 25m3 stops
$3,512
Find Deal
Sun, 26 Jan - Tue, 28 Jan
06:15 - 07:00STL-SYD
31h 45m1 stop
12:10 - 18:09SYD-STL
22h 59m1 stop
$3,530United Airlines
Find Deal
Sat, 25 Jan - Fri, 31 Jan
16:36 - 08:45STL-SYD
23h 09m2 stops
11:45 - 09:55SYD-STL
39h 10m2 stops
$3,922Air New Zealand
Find Deal
Sat, 25 Jan - Mon, 27 Jan
06:03 - 07:25STL-SYD
32h 22m1 stop
17:25 - 23:03SYD-STL
22h 38m1 stop
$4,306Qantas Airways
Find Deal
Sat, 25 Jan - Mon, 27 Jan

Fiji Airways flights from St. Louis to Sydney

Our best Fiji Airways deals on St. Louis to Sydney flight tickets
Fiji Airways
8 Feb
STL17:12Lambert-St Louis
26h 18m
2 stops
SYD12:30Sydney Kingsford Smith
27 Feb
SYD06:15Sydney Kingsford Smith
30h 14m
2 stops
STL19:29Lambert-St Louis
Fiji Airways
6 Mar
STL17:37Lambert-St Louis
26h 23m
2 stops
SYD13:00Sydney Kingsford Smith
13 Mar
SYD14:00Sydney Kingsford Smith
25h 09m
2 stops
STL23:09Lambert-St Louis

Air Canada flights from St. Louis to Sydney

Our best Air Canada deals on St. Louis to Sydney flight tickets
Air Canada
24 Feb
STL15:50Lambert-St Louis
48h 45m
2 stops
SYD09:35Sydney Kingsford Smith
24 Aug
SYD09:20Sydney Kingsford Smith
44h 56m
2 stops
STL15:16Lambert-St Louis
Air Canada
3 July
STL13:30Lambert-St Louis
50h 50m
3 stops
SYD07:20Sydney Kingsford Smith
13 July
SYD09:20Sydney Kingsford Smith
44h 56m
2 stops
STL15:16Lambert-St Louis
Air Canada
3 July
STL13:30Lambert-St Louis
50h 50m
2 stops
SYD07:20Sydney Kingsford Smith
13 July
SYD09:20Sydney Kingsford Smith
49h 40m
2 stops
STL20:00Lambert-St Louis

See travel insights to Sydney from

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 March is, on average, the cheapest month to fly to Sydney from St. Louis, with most prices found around $2,120. If you aren’t able to travel to Sydney during the month of March, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $2,214.

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

Our data shows that Monday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $0. The most expensive day to fly to Sydney is Friday, with ticket prices averaging around $2,822.

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 at midday. momondo users have found flights departing from St. Louis to Sydney at midday for as low as $0. 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 $2,822 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 26 weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,493 when searching 26 weeks out.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 $1,998 on momondo.

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

As of January 2025, prices for St. Louis to Sydney flights are approximately 41% cheaper 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

$901

Fastest flight time

20h 45m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from St. Louis in the past 72 hours is $901. The best return flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,832.
The fastest flight from St. Louis to Sydney takes 20h 45m
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 45m.

  • 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.


Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Terrigal
Lithgow
Penrith
Leura
Manly
Cronulla
Coogee
Randwick
Bondi Beach
Charlestown
Swansea

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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