$616 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 2/18. 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
$905
Overall average: $1,409
Air Canada
Thu 5/14Fri 6/5
SYD - STL • 2 stops
Cheapest one-way
$552
Delta
Wed 2/18
MEL - STL • 2 stops
When to travel
August
Cheapest • 13% 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

Thu, May 14 - Fri, Jun 5
Air Canada Logo
9:20 am - 12:06 pm
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
7:30 am - 7:20 am
STL
-
SYD
32h 50m
2 stops
$905Air Canada
Mon, Mar 9 - Mon, Mar 16
American Airlines Logo
12:00 pm - 7:29 pm
MEL
-
STL
23h 29m
2 stops
American Airlines Logo
4:13 pm - 9:30 am
STL
-
MEL
25h 17m
2 stops
$949American Airlines
Sat, Mar 28 - Sat, Apr 4
American Airlines Logo
12:00 pm - 11:58 pm
MEL
-
STL
27h 58m
1 stop
American Airlines Logo
11:46 am - 5:00 am
STL
-
MEL
26h 14m
1 stop
$951American Airlines
Sat, Jun 6 - Mon, Jun 29
Delta Logo
9:15 am - 9:14 pm
SYD
-
STL
26h 59m
2 stops
Delta Logo
6:00 am - 6:50 am
STL
-
SYD
33h 50m
2 stops
$969Delta
Sat, Mar 28 - Sat, Apr 4
Qantas Airways Logo
12:00 pm - 11:58 pm
MEL
-
STL
27h 58m
1 stop
Qantas Airways Logo
11:46 am - 5:00 am
STL
-
MEL
26h 14m
1 stop
$973Qantas Airways
Sun, Jun 7 - Tue, Jun 30
Delta Logo
9:15 am - 8:40 am
SYD
-
STL
38h 25m
2 stops
Delta Logo
3:42 pm - 6:50 am
STL
-
SYD
24h 08m
2 stops
$974Delta
Sat, Mar 28 - Sat, Apr 4
Qantas Airways Logo
12:00 pm - 11:58 pm
MEL
-
STL
27h 58m
1 stop
Qantas Airways Logo
11:46 am - 6:45 am
STL
-
MEL
27h 59m
2 stops
$977Qantas Airways
Wed, Mar 25 - Wed, Apr 1
Multiple Airlines Logo
5:45 pm - 11:58 pm
SYD
-
STL
22h 13m
1 stop
Multiple Airlines Logo
4:13 pm - 6:55 am
STL
-
SYD
22h 42m
1 stop
$1,059Multiple Airlines
Sat, Jun 6 - Mon, Jun 29
United Airlines Logo
10:20 am - 9:11 pm
SYD
-
STL
25h 51m
2 stops
United Airlines Logo
7:06 pm - 6:55 am
STL
-
SYD
20h 49m
1 stop
$1,093United Airlines
Fri, Jun 5 - Sun, Jun 28
United Airlines Logo
9:30 am - 8:38 pm
SYD
-
STL
26h 08m
2 stops
United Airlines Logo
1:13 pm - 7:00 am
STL
-
SYD
26h 47m
2 stops
$1,099United Airlines
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 November, where tickets cost $825 on average for one-way flights. On the other hand, the most expensive months are July and April, where the average cost of tickets from Australia is $1,937 and $1,631 respectively. For return trips, the best month to travel is August with an average price of $1,153.

Good to know

Low seasonAugust
Cheapest flight$552
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Melbourne 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 2,298 direct flights from within Australia to St. Louis. The most common day for departures is Thursday, with 15% 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 988 reviews
7.5Comfort
7.0Food
7.2Entertainment
7.7Boarding
8.1Crew
Airline reviews

Flight arrived late with no one to help over 30 people rebook. I slept at the airport.

2.0 MediocreKelsey, Feb 2026
MIA - LAX
Read more Qantas Airways reviews

Flight arrived late with no one to help over 30 people rebook. I slept at the airport.

Business seats not as comfortable or private as most competitors (e.g. Qantas was outstanding), and movie selection was much more limited than Qantas or United has been recently

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....

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.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Horrible Flight significantly delayed. Not due to united issue. But trying to rebook connection flight and get information about overnight accommodation was difficult. Agent did not seem to care or have any interest to help.

Everything was on time Will use united again for sure

Plane outlets in my row not working to charge phone. Staff response was, well it should be. Plug into seed for volume not working well. Had to find the sweet spot for plug in or it would shut off and on.

Fine not above and beyond as I had a connection that was delayed due to maintenance

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

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