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Cheap flights from St. Louis to Sydney from $825

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 11/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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Find the cheapest flights from St. Louis to Sydney

Cheap round-trip flights

These are some of the best round-trip 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 layovers.

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.
3:50 pm - 9:35 amSTL-SYD
48h 45m2 stops
11:20 am - 3:06 pmSYD-STL
44h 46m2 stops
$1,101Air Canada
Find Deal
Sat, Feb 1 - Sat, Feb 15
4:36 pm - 9:05 amSTL-SYD
23h 29m2 stops
12:10 pm - 6:56 pmSYD-STL
23h 46m1 stop
$1,209United Airlines
Find Deal
Sat, Feb 1 - Sat, Feb 15
6:30 am - 6:35 amSTL-SYD
33h 05m2 stops
9:25 am - 9:33 pmSYD-STL
27h 08m2 stops
$1,217Delta
Find Deal
Fri, Apr 25 - Wed, May 7
6:30 am - 6:35 amSTL-SYD
33h 05m2 stops
9:25 am - 8:33 pmSYD-STL
26h 08m2 stops
$1,218Delta
Find Deal
Fri, Apr 25 - Wed, May 7
8:40 am - 12:40 pmSTL-SYD
35h 00m2 stops
7:15 pm - 10:13 pmSYD-STL
43h 58m2 stops
$1,664Air New Zealand
Find Deal
Mon, Nov 25 - Sat, Dec 7
7:00 pm - 9:15 amSTL-SYD
21h 15m1 stop
11:45 am - 10:13 pmSYD-STL
27h 28m2 stops
$1,902Air New Zealand
Find Deal
Wed, Nov 27 - Wed, Dec 4
12:49 pm - 6:35 amSTL-SYD
24h 46m1 stop
11:15 am - 12:12 amSYD-STL
29h 57m1 stop
$2,100Qantas Airways
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Tue, Dec 3 - Mon, Dec 16
6:17 am - 9:00 amSTL-SYD
33h 43m1 stop
11:15 am - 12:12 amSYD-STL
29h 57m1 stop
$2,105Qantas Airways
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Tue, Dec 3 - Mon, Dec 16
6:03 am - 7:25 amSTL-SYD
32h 22m1 stop
11:50 am - 10:34 pmSYD-STL
27h 44m1 stop
$2,141American Airlines
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Sat, Feb 1 - Sat, Feb 15
6:30 am - 9:00 amSTL-SYD
33h 30m1 stop
11:15 am - 11:27 pmSYD-STL
29h 12m1 stop
$4,689American Airlines
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Fri, Dec 20 - Mon, Dec 23
5:38 pm - 7:45 pmSTL-SYD
57h 07m3 stops
Thu, Nov 28
10:01 am - 8:50 pmSTL-SYD
41h 49m2 stops
Thu, Nov 28
3:45 pm - 7:25 amSTL-SYD
22h 40m1 stop
$1,483American Airlines
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Thu, Nov 28
3:50 pm - 8:20 amSTL-SYD
48h 30m2 stops
$1,833Air Canada
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Wed, Apr 2
3:30 pm - 3:50 pmSTL-SYD
56h 20m3 stops
$2,266
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Wed, Apr 2
4:06 pm - 6:55 amSTL-SYD
22h 49m1 stop
$2,970Qantas Airways
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Wed, Apr 2
7:00 pm - 9:15 amSTL-SYD
21h 15m1 stop
11:45 am - 8:57 pmSYD-STL
26h 12m2 stops
$1,861Air New Zealand
Find Deal
Mon, Nov 18 - Wed, Nov 20
11:05 am - 10:25 amSTL-SYD
30h 20m2 stops
7:15 pm - 8:57 pmSYD-STL
42h 42m2 stops
$1,961Air New Zealand
Find Deal
Mon, Nov 18 - Wed, Nov 20
4:54 pm - 9:05 amSTL-SYD
23h 11m2 stops
11:45 am - 11:30 pmSYD-STL
28h 45m2 stops
$1,963Air New Zealand
Find Deal
Mon, Nov 18 - Wed, Nov 20
7:00 pm - 9:15 amSTL-SYD
21h 15m1 stop
12:10 pm - 4:56 pmSYD-STL
45h 46m1 stop
$2,076United Airlines
Find Deal
Sun, Nov 17 - Wed, Nov 20
4:54 pm - 7:00 amSTL-SYD
21h 06m1 stop
12:10 pm - 4:56 pmSYD-STL
45h 46m1 stop
$2,127United Airlines
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Sun, Nov 17 - Thu, Nov 21
11:20 am - 10:25 amSTL-SYD
30h 05m3 stops
1:55 pm - 11:30 pmSYD-STL
26h 35m3 stops
$2,352
Find Deal
Mon, Nov 18 - Wed, Nov 20
6:17 am - 9:00 amSTL-SYD
33h 43m1 stop
11:15 am - 11:57 pmSYD-STL
29h 42m1 stop
$2,461Qantas Airways
Find Deal
Mon, Nov 18 - Wed, Nov 20
12:52 pm - 6:35 amSTL-SYD
24h 43m1 stop
5:25 pm - 11:57 pmSYD-STL
23h 32m1 stop
$2,628Qantas Airways
Find Deal
Mon, Nov 18 - Wed, Nov 20
8:40 am - 9:05 amSTL-SYD
31h 25m2 stops
11:30 am - 4:38 pmSYD-STL
70h 08m3 stops
$2,677United Airlines
Find Deal
Mon, Nov 18 - Wed, Nov 20
7:09 am - 8:20 amSTL-SYD
32h 11m2 stops
10:20 am - 4:37 pmSYD-STL
47h 17m3 stops
$2,982
Find Deal
Mon, Nov 18 - Wed, Nov 20

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
Nov 25
STL8:40 amLambert-St Louis
35h 00m
2 stops
SYD12:40 pmSydney Kingsford Smith
Dec 7
SYD7:15 pmSydney Kingsford Smith
43h 58m
2 stops
STL10:13 pmLambert-St Louis
Air New Zealand
Nov 27
STL7:00 pmLambert-St Louis
21h 15m
1 stop
SYD9:15 amSydney Kingsford Smith
Dec 4
SYD11:45 amSydney Kingsford Smith
27h 28m
2 stops
STL10:13 pmLambert-St Louis
Air New Zealand
Dec 3
STL7:00 amLambert-St Louis
32h 45m
2 stops
SYD8:45 amSydney Kingsford Smith
Dec 16
SYD12:10 pmSydney Kingsford Smith
22h 46m
1 stop
STL5:56 pmLambert-St Louis

Delta flights from St. Louis to Sydney

Our best Delta deals on St. Louis to Sydney flight tickets
Delta
Apr 25
STL6:30 amLambert-St Louis
33h 05m
2 stops
SYD6:35 amSydney Kingsford Smith
May 7
SYD9:25 amSydney Kingsford Smith
27h 08m
2 stops
STL9:33 pmLambert-St Louis
Delta
Apr 25
STL6:30 amLambert-St Louis
33h 05m
2 stops
SYD6:35 amSydney Kingsford Smith
May 7
SYD9:25 amSydney Kingsford Smith
26h 08m
2 stops
STL8:33 pmLambert-St Louis
Delta
Dec 12
STL6:00 amLambert-St Louis
33h 35m
2 stops
SYD8:35 amSydney Kingsford Smith
Dec 27
SYD11:05 amSydney Kingsford Smith
27h 37m
2 stops
STL9:42 pmLambert-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 cheapest month to fly from St. Louis to Sydney?

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

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

Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Saturday

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

In the afternoon. St. Louis to Sydney flights are approximately 20% more expensive at noon than in the afternoon

What is the cheapest airline that flies to Sydney from St. Louis?

Air Canada. Air Canada, United Airlines, and American Airlines are the most popular carriers operating from St. Louis to Sydney

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 35% 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 90% 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 round-trip 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

$825

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 $825. The best round-trip flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,101.
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?

    Lambert-St Louis and Sydney Kingsford Smith are 9057.2 mi apart from one another. A reasonable flight in good conditions will take 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 are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents you'll need for your trip to Sydney Kingsford Smith Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sydney Kingsford Smith Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Sydney?


Best airlines flying from St. Louis to Sydney

Compare and see reviews for airlines that fly from St. Louis to Sydney with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $942Free CancellationRating
8.0
8,788 reviews
Search Delta flights
Air CanadaPriceFrom $962Free CancellationRating
7.0
8,198 reviews
Search Air Canada flights
United AirlinesPriceFrom $989Free CancellationRating
7.4
9,194 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,134Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $1,236Free CancellationRating
7.6
826 reviews
Search Qantas Airways flights
Air New ZealandPriceFrom $1,404Free CancellationRating
8.0
529 reviews
Search Air New Zealand flights

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?

Yes. All flights to Sydney from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from St. Louis.

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 not ready to book a flight from St. Louis to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.


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