$567 Find Cheap Flights from Australia to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 2/20. 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 for flights 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 for flights to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$885
Overall average: $1,171
United Airlines
Fri 3/27Sat 4/4
MEL - STL • 2 stops
Cheapest one-way
$567
Multiple Airlines
Fri 2/20
SYD - STL • 3 stops
When to travel
August
Cheapest • 15% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s 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 Australia to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Australia 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 round-trip flight deals from Australia to St. Louis

Fri, Mar 27 - Sat, Apr 4
United Airlines Logo
10:30 am - 4:59 pm
MEL
-
STL
22h 29m
2 stops
United Airlines Logo
8:30 am - 9:15 am
STL
-
MEL
32h 45m
1 stop
$885United Airlines
Thu, Jul 16 - Mon, Aug 3
Air Canada Logo
9:20 am - 6:27 pm
SYD
-
STL
48h 07m
2 stops
Air Canada Logo
5:20 am - 7:20 am
STL
-
SYD
35h 00m
2 stops
$1,158Air Canada
Thu, Feb 19 - Mon, Feb 23
Air Canada Logo
11:20 am - 8:26 pm
SYD
-
STL
26h 06m
2 stops
Air Canada Logo
4:30 pm - 9:35 am
STL
-
SYD
24h 05m
2 stops
$1,160Air Canada
Thu, Jul 16 - Sun, Aug 2
Air Canada Logo
9:20 am - 6:27 pm
SYD
-
STL
48h 07m
2 stops
Air Canada Logo
2:40 pm - 7:20 am
STL
-
SYD
49h 40m
2 stops
$1,162Air Canada
Tue, Mar 3 - Mon, Apr 13
American Airlines Logo
11:20 am - 5:13 pm
SYD
-
STL
22h 53m
2 stops
American Airlines Logo
3:36 pm - 7:05 am
STL
-
SYD
24h 29m
2 stops
$1,163American Airlines
Tue, Mar 3 - Mon, Apr 13
American Airlines Logo
11:20 am - 11:59 pm
SYD
-
STL
29h 39m
1 stop
American Airlines Logo
6:20 am - 7:05 am
STL
-
SYD
33h 45m
1 stop
$1,168American Airlines
Sat, Mar 28 - Sat, Apr 4
Multiple Airlines Logo
2:20 pm - 11:58 pm
MEL
-
STL
25h 38m
2 stops
Multiple Airlines Logo
4:13 pm - 5:00 am
STL
-
MEL
21h 47m
1 stop
$1,219Multiple Airlines
Sat, Mar 28 - Sun, Apr 5
Multiple Airlines Logo
1:05 pm - 11:58 pm
MEL
-
STL
26h 53m
2 stops
Multiple Airlines Logo
6:50 pm - 12:10 pm
STL
-
MEL
26h 20m
2 stops
$1,497Multiple Airlines
Thu, Feb 19 - Mon, Feb 23
Qantas Airways Logo
5:15 pm - 11:59 pm
LST
-
STL
47h 44m
2 stops
Qantas Airways Logo
6:38 am - 4:35 pm
STL
-
LST
40h 57m
2 stops
$1,508Qantas Airways
Thu, Feb 19 - Mon, Feb 23
Qantas Airways Logo
5:15 pm - 11:59 pm
LST
-
STL
47h 44m
2 stops
Qantas Airways Logo
6:38 am - 4:35 pm
STL
-
LST
40h 57m
2 stops
$1,536Qantas Airways
Booking Insights

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

Get data-powered insights and trends for flights 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 to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights 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 to St. Louis is February, where tickets cost $900 on average for one-way flights. On the other hand, the most expensive months are July and September, where the average cost of tickets from Australia is $1,937 and $1,527 respectively. For return trips, the best month to travel is August with an average price of $1,128.

Good to know

Low seasonAugust
Cheapest flight$567
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Sydney to St. Louis

FAQs - booking St. Louis flights

  • How far is Lambert-St Louis Airport from central St. Louis?

    There are 13 miles between St. Louis city center and Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    When flying to St. Louis, you'll arrive at Lambert-St Louis Airport (STL). The airport is also known as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

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

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

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

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

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

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 1,824 direct flights from within Australia to St. Louis. The most common day for departures is Friday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top airlines flying from Australia to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Australia to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with 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 973 reviews
8.2Crew
7.0Food
7.7Boarding
7.2Entertainment
7.5Comfort
Airline reviews

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

8.0 ExcellentFrank, Jan 2026
SYD - WLG
Read more Qantas Airways reviews

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....

Flight was canceled. I was not alerted. It was only kayak that alerted me

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

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.

Not great. The inflight entertainment was all on an app, and I did not want to watch a film on my phone. Also, the range of options of films was limited.

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

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

Mean flight attendant. I wanted to reuse my plastic cup, but he (Matthew) said he can't for safety. I then said "I don't want water then" and he poured me a glass. I hope Matthew gets herpes and spends the rest of his life poor, lonely, and homeless.

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

Reliable, nice crew, I fly often on that flight and I like it all.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

The seats were comfortable and we had leg room. Great entertainment.

The flight crew where really good. Better then the crew from BNE to SFO

Delayed, toilets did not flush, pilot parked to far away from Gate

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

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

Information on the airport you'll fly into in St. Louis