Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Sydney from $462

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 2/23. 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
0 bags

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

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.
4:53 pm - 1:00 pmSTL-SYD
27h 07m2 stops
2:00 pm - 7:29 pmSYD-STL
22h 29m2 stops
$1,227Fiji Airways
Find Deal
Thu, Feb 6 - Thu, Feb 13
3:50 pm - 9:35 amSTL-SYD
48h 45m2 stops
11:20 am - 3:06 pmSYD-STL
44h 46m2 stops
$1,232Air Canada
Find Deal
Mon, Feb 3 - Sun, Feb 23
2:49 pm - 7:45 pmSTL-SYD
35h 56m2 stops
9:40 pm - 11:59 pmSYD-STL
43h 19m2 stops
$1,490Alaska Airlines
Find Deal
Thu, Feb 6 - Thu, Feb 13
9:00 am - 6:20 amSTL-SYD
28h 20m1 stop
11:50 am - 8:44 pmSYD-STL
25h 54m1 stop
$1,504United Airlines
Find Deal
Fri, Feb 14 - Fri, Feb 21
1:03 pm - 7:00 amSTL-SYD
24h 57m2 stops
11:20 am - 5:06 pmSYD-STL
22h 46m2 stops
$1,508United Airlines
Find Deal
Fri, Feb 14 - Fri, Feb 21
4:36 pm - 8:45 amSTL-SYD
23h 09m2 stops
12:10 pm - 6:56 pmSYD-STL
23h 46m1 stop
$1,601Air New Zealand
Find Deal
Sat, Feb 1 - Sat, Feb 15
6:10 am - 9:00 amSTL-SYD
33h 50m1 stop
11:15 am - 11:08 pmSYD-STL
28h 53m1 stop
$1,751Qantas Airways
Find Deal
Fri, Feb 14 - Fri, Feb 21
2:49 pm - 7:45 pmSTL-SYD
35h 56m3 stops
9:40 pm - 1:53 pmSYD-STL
33h 13m2 stops
$1,863Alaska Airlines
Find Deal
Sun, Jan 12 - Sat, Jan 18
7:00 am - 9:15 amSTL-SYD
33h 15m1 stop
7:15 pm - 6:59 pmSYD-STL
40h 44m2 stops
$2,168Air New Zealand
Find Deal
Sun, Jan 12 - Sat, Jan 18
5:27 pm - 6:35 amSTL-SYD
21h 08m1 stop
9:10 am - 10:54 pmSYD-STL
28h 44m1 stop
$4,078Qantas Airways
Find Deal
Sun, Mar 23 - Thu, Apr 17
7:00 am - 3:35 pmSTL-SYD
39h 35m2 stops
Sun, Feb 23
7:00 am - 3:35 pmSTL-SYD
39h 35m2 stops
Thu, Feb 20
5:37 pm - 12:30 pmSTL-SYD
25h 53m2 stops
$600Fiji Airways
Find Deal
Tue, Feb 25
5:37 pm - 12:30 pmSTL-SYD
25h 53m2 stops
$629Fiji Airways
Find Deal
Tue, Feb 18
10:49 am - 12:30 pmSTL-SYD
32h 41m2 stops
Sat, Feb 22
6:10 am - 12:30 pmSTL-SYD
37h 20m2 stops
Mon, Feb 17
3:50 pm - 9:35 amSTL-SYD
48h 45m2 stops
$716Air Canada
Find Deal
Sun, Feb 16
3:50 pm - 9:35 amSTL-SYD
48h 45m2 stops
$775Air Canada
Find Deal
Wed, Feb 19
1:03 pm - 9:05 amSTL-SYD
27h 02m2 stops
$809United Airlines
Find Deal
Sun, Mar 2
10:55 am - 7:00 amSTL-SYD
27h 05m1 stop
$874United Airlines
Find Deal
Thu, Feb 20
8:30 am - 8:45 amSTL-SYD
31h 15m2 stops
12:10 pm - 12:28 amSYD-STL
29h 18m1 stop
$2,350Air New Zealand
Find Deal
Wed, Dec 25 - Fri, Dec 27
8:50 am - 9:15 amSTL-SYD
31h 25m1 stop
7:15 pm - 11:59 pmSYD-STL
45h 44m2 stops
$2,364Air New Zealand
Find Deal
Thu, Dec 26 - Sat, Dec 28
8:50 am - 9:15 amSTL-SYD
31h 25m1 stop
6:25 pm - 10:02 pmSYD-STL
44h 37m2 stops
$2,386Air New Zealand
Find Deal
Thu, Dec 26 - Sat, Dec 28
8:30 am - 8:45 amSTL-SYD
31h 15m2 stops
7:15 pm - 12:28 amSYD-STL
46h 13m2 stops
$2,411Air New Zealand
Find Deal
Wed, Dec 25 - Fri, Dec 27
5:29 pm - 6:35 amSTL-SYD
20h 06m1 stop
5:25 pm - 11:27 pmSYD-STL
23h 02m1 stop
$2,630Qantas Airways
Find Deal
Wed, Dec 25 - Fri, Dec 27
5:00 am - 9:15 amSTL-SYD
35h 15m2 stops
12:00 pm - 12:28 amSYD-STL
53h 28m2 stops
$2,642United Airlines
Find Deal
Thu, Dec 26 - Sat, Dec 28
6:00 am - 7:00 amSTL-SYD
32h 00m1 stop
11:20 am - 12:48 pmSYD-STL
42h 28m2 stops
$2,934United Airlines
Find Deal
Sat, Dec 28 - Sat, Jan 4
11:36 am - 7:25 amSTL-SYD
26h 49m3 stops
12:00 pm - 7:30 pmSYD-STL
24h 30m2 stops
$3,189
Find Deal
Wed, Dec 25 - Fri, Dec 27
6:30 am - 9:00 amSTL-SYD
33h 30m1 stop
11:50 am - 7:30 pmSYD-STL
24h 40m1 stop
$3,265Qantas Airways
Find Deal
Thu, Dec 26 - Sat, Dec 28
11:30 am - 10:25 amSTL-SYD
29h 55m3 stops
1:55 pm - 10:16 pmSYD-STL
25h 21m3 stops
$3,494
Find Deal
Wed, Dec 25 - Fri, Dec 27

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
Feb 1
STL4:36 pmLambert-St Louis
23h 09m
2 stops
SYD8:45 amSydney Kingsford Smith
Feb 15
SYD12:10 pmSydney Kingsford Smith
23h 46m
1 stop
STL6:56 pmLambert-St Louis
Air New Zealand
Jan 12
STL7:00 amLambert-St Louis
33h 15m
1 stop
SYD9:15 amSydney Kingsford Smith
Jan 18
SYD7:15 pmSydney Kingsford Smith
40h 44m
2 stops
STL6:59 pmLambert-St Louis
Air New Zealand
Dec 25
STL8:30 amLambert-St Louis
31h 15m
2 stops
SYD8:45 amSydney Kingsford Smith
Dec 27
SYD12:10 pmSydney Kingsford Smith
29h 18m
1 stop
STL12:28 amLambert-St Louis

Air Canada flights from St. Louis to Sydney

Our best Air Canada deals on St. Louis to Sydney flight tickets
Air Canada
Feb 3
STL3:50 pmLambert-St Louis
48h 45m
2 stops
SYD9:35 amSydney Kingsford Smith
Feb 23
SYD11:20 amSydney Kingsford Smith
44h 46m
2 stops
STL3:06 pmLambert-St Louis
Air Canada
Feb 1
STL3:50 pmLambert-St Louis
48h 45m
2 stops
SYD9:35 amSydney Kingsford Smith
Feb 15
SYD11:20 amSydney Kingsford Smith
44h 46m
2 stops
STL3:06 pmLambert-St Louis
Air Canada
Jan 19
STL3:50 pmLambert-St Louis
48h 45m
2 stops
SYD9:35 amSydney Kingsford Smith
Jan 26
SYD11:20 amSydney Kingsford Smith
44h 46m
2 stops
STL3:06 pmLambert-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?

In general, March is the cheapest month to fly from St. Louis to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,282. If you are unable to visit Sydney during the month of March, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $1,329.

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

The cheapest day to depart from St. Louis to Sydney is on a Wednesday when prices can be found for as low as $1,392. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,518.

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 evening. momondo users have found flights departing from St. Louis to Sydney in the evening for as low as $1,440. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly at noon, with an average ticket price of $1,882. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

The ideal time to book your flight to Sydney is 60 days in advance when prices tend to average $1,503. 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 $934 on momondo.

Can stopping save me money on St. Louis to Sydney flights?

You could potentially save up to 42% 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 December 2024, prices for St. Louis to Sydney flights are approximately 28% 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 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

$462

Fastest flight time

20h 06m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from St. Louis in the past 72 hours is $462. The best round-trip flight deal from St. Louis to Sydney found on momondo in the last 72 hours is $1,227.
The fastest flight from St. Louis to Sydney takes 20h 06m
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 06m.

  • 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
8,588 reviews
Search Delta flights
Air CanadaPriceFrom $962Free CancellationRating
7.0
8,421 reviews
Search Air Canada flights
United AirlinesPriceFrom $989Free CancellationRating
7.4
9,022 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,134Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $1,232Free CancellationRating
7.5
809 reviews
Search Qantas Airways flights
Air New ZealandPriceFrom $1,401Free CancellationRating
7.9
493 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.


An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Sat 12/28
Sat 1/4
Email me momondo's favorite deals

Find better results for your trip to Australia