SYD - STL

$1,483 Find Cheap Flights from Sydney to St. Louis

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sydney to St. Louis departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
$1,483
Overall average: $1,696
American Airlines
Tue 3/3Mon 13/4
SYD - STL • 2 stops
Cheapest one-way flight
Multiple Airlines
Thu 29/1
SYD - STL • multi-stop
Top airlines
American Airlines
Cheapest • from $1,483 (return)
Qantas Airways
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
August
Cheapest • 15% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Sydney to St. Louis (SYD-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Sydney to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Sydney to St. Louis

Tue, 3 Mar - Mon, 13 Apr
American Airlines Logo
11:20 - 21:12
SYD
-
STL
26h 52m
2 stops
American Airlines Logo
12:27 - 07:05
STL
-
SYD
27h 38m
2 stops
$1,483American Airlines
Thu, 19 Feb - Mon, 23 Feb
American Airlines Logo
11:20 - 19:29
SYD
-
STL
25h 09m
2 stops
American Airlines Logo
16:13 - 09:00
STL
-
SYD
23h 47m
2 stops
$1,488American Airlines
Thu, 12 Feb - Wed, 18 Feb
American Airlines Logo
11:20 - 19:29
SYD
-
STL
25h 09m
2 stops
American Airlines Logo
14:31 - 09:00
STL
-
SYD
25h 29m
2 stops
$1,498American Airlines
Thu, 19 Feb - Mon, 23 Feb
American Airlines Logo
11:20 - 23:59
SYD
-
STL
29h 39m
1 stop
American Airlines Logo
06:38 - 09:00
STL
-
SYD
33h 22m
1 stop
$1,499American Airlines
Fri, 13 Feb - Thu, 19 Feb
Qantas Airways Logo
06:30 - 17:13
SYD
-
STL
27h 43m
2 stops
Qantas Airways Logo
18:50 - 17:50
STL
-
SYD
30h 00m
2 stops
$1,508Qantas Airways
Thu, 12 Feb - Wed, 18 Feb
American Airlines Logo
17:45 - 23:59
SYD
-
STL
23h 14m
1 stop
American Airlines Logo
14:19 - 09:00
STL
-
SYD
25h 41m
2 stops
$1,509American Airlines
Tue, 3 Mar - Mon, 13 Apr
American Airlines Logo
14:05 - 17:13
SYD
-
STL
20h 08m
1 stop
American Airlines Logo
06:20 - 07:05
STL
-
SYD
33h 45m
1 stop
$1,511American Airlines
Tue, 3 Mar - Mon, 13 Apr
United Airlines Logo
12:10 - 20:26
SYD
-
STL
25h 16m
2 stops
United Airlines Logo
16:49 - 07:00
STL
-
SYD
23h 11m
2 stops
$1,513United Airlines
Thu, 12 Feb - Wed, 18 Feb
American Airlines Logo
17:45 - 23:59
SYD
-
STL
23h 14m
1 stop
American Airlines Logo
06:38 - 09:00
STL
-
SYD
33h 22m
1 stop
$1,516American Airlines
Thu, 12 Mar - Thu, 19 Mar
Multiple Airlines Logo
11:20 - 23:58
SYD
-
STL
28h 38m
1 stop
Multiple Airlines Logo
18:50 - 17:40
STL
-
SYD
30h 50m
2 stops
$1,521Multiple Airlines
Booking Insights

KAYAK's insights & trends for Sydney to St. Louis flights

Get data-powered insights and trends into flights from Sydney to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Sydney to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Sydney to St. Louis is August, where tickets cost $1,611 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $2,486 and $2,296 respectively.

Good to know

Low seasonMarch
Cheapest flight$1,483
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly (21% more expensive on average)
Flight from Sydney to St. Louis

When to book flights from Sydney to St. Louis

Are your dates flexible? Find out the best times to travel from Sydney to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Sydney to St. Louis

  • What is the cheapest flight from Sydney to St. Louis?

    In the last 3 days, the lowest price for a flight from Sydney to St. Louis was $1,483 for a return ticket.

  • Which airports will I be using when flying from Sydney to St. Louis?

    On your way to St. Louis, you’ll fly out from Sydney Kingsford Smith. You’ll be landing at Lambert-St Louis.

  • Which aircraft models fly most regularly from Sydney to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sydney to St. Louis?

    oneworld, and Star Alliance are the airline alliances operating flights between Sydney and St. Louis, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Sydney to St. Louis, Qantas Airways or United Airlines?

    The two airlines most popular with KAYAK users for flights from Sydney to St. Louis are Qantas Airways and United Airlines. With an average price for the route of $1,856 and an overall rating of 7.5, Qantas Airways is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,947 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Sydney to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Sydney to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sydney to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Sydney is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sydney to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to St. Louis with an airline and back to Sydney with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sydney to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines flying from Sydney to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Sydney to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sydney to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Qantas AirwaysOverall score based on 981 reviews
7.5Comfort
7.2Entertainment
7.7Boarding
8.2Crew
7.0Food
Airline reviews

Hard to move and get out of my seat when the passenger in front is in recline position.

2.0 MediocreAnonymous, Jan 2026
MEL - LAX
Read more Qantas Airways reviews

Hard to move and get out of my seat when the passenger in front is in recline position.

It was a good flight and no complaints. It just wasn't anything that was better than any other flight.

The crew were wonderful - if only the customers were as well behaved as the attendants!! Ha ha! If you could just talk to God and ask for less turbulence next time.... Juuuuust kidding....

Basic airline, aircraft and service. AA gets you from point A to B. My flight was delayed by 2 hours too.

No internet on flight, which makes log travels really hard.

My flight from Dallas to Sydney was cancelled. My entire trip was rerouted to include the following: Hartford to Washington DC Washington DC to JFK JFK to Auckland Auckland to Christchurch I paid for an aisle seat on the flight to Auckland and was asked if I would take a window seat to accommodate a family. The agent at the podium failed to mention that the family had a 3 month old baby and that a bassinet would be used during the 16 hour flight. The only way I could get out of my seat was to crawl under the bassinet of the sleeping baby. I think it is wrong that I was no given the choice to sit in another seat, that the agent knew what she was doing and chose to not properly disclose my seating arrangement. Terrible treatment.

they ran out of fruit for breakfast and so I just had a yogurt instead. other than that the flight was good

by the time they got to our row, they were out of some of the food options. games and movies were great but maybe more game options like tetris or pac man would be great

Great as usual, some delays but well communicated and made up for in the air

Poor! This flight was delayed 14 hours. There was no assistance in helping customers find other routes to their destination, nor any other kind of support. It was a chaotic experience. I'm not likely to fly with AA going forward.

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

This Japanese airline provides great service and very helpful in assisting their passengers.

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

I so appreciate the crew members on each flight of United. They are outstanding.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Air Canada’s problems are not staff related by and large, no. The problem is tiny jets between the U.S. and Canada - yes, believe it or not they are still “international” (just ask our own Mango Maniac in power in the U.S.). The little aisle is compounded by a design flaw of a “dog leg” starting at seat 12. Woe be unto you if you sit here as passengers and attendants do not have sufficient room to not hit you in the face with backpacks. One thing I will say very positively about Air Canada is you still provide pillows and blankets on transcontinental flights to all, not just the elites. Your tiny improperly designed jets are also a problem flying city to city within Canada also. One can only say you remind us of a “Jet Blue” or “Spirit” experience. Also your luggage space is downright Byzantine! We will endeavor to avoid you and use other U.S. carriers, albeit charging more.

Terrible canceled flight and lost my luggage. Flew me to Halifax. Tgat flight was delayed, had to spend night in airport chair.

Better entertainment & food options more may be adding chicken option or on vegetarian side good quality pasta

My seat was not comfortable. Flight was smooth. Regretfully we had two delays before takeoff

Amazing service, with enthusiastic crew members, and some breathtaking views of Vancouver. No IFE though, as it is only a 1 hour flight on a regional Turboprop jet.

They are very proactive and made our boarding easy and always notified us about any changes well in advance.

My seat was covered in vomit and I will be reaching out to Air Canada

It's kindof ridiculous that your system is even asking me about this since my flight was canceled and I wasn't rescheduled.

3 hr delay at the gate while they were doing maintenance. Next time, do not board passengers while maintenance is being performed

Digital check in is very poor with air canada compaired to other airlines

Everything you need to know for your flight from Sydney to St. Louis

Information on your arrival and departure airports