$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 1/18. 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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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, Mar 12 - Mon, Mar 16
Air Canada Logo
10:25 am - 3:29 pmSYD-STL
45h 04m2 stops
Air Canada Logo
3:00 pm - 8:35 amSTL-SYD
25h 35m2 stops
$878Air Canada
Find Deal
Mon, Nov 24 - Sun, Nov 30
Air Canada Logo
11:20 am - 3:29 pmSYD-STL
45h 09m2 stops
Air Canada Logo
4:05 pm - 9:35 amSTL-SYD
48h 30m2 stops
$915Air Canada
Find Deal
Mon, Nov 24 - Sun, Nov 30
American Airlines Logo
11:20 am - 11:42 pmSYD-STL
29h 22m1 stop
American Airlines Logo
7:00 am - 9:00 amSTL-SYD
33h 00m1 stop
$974American Airlines
Find Deal
Mon, Nov 24 - Sun, Nov 30
United Airlines Logo
11:50 am - 5:39 pmSYD-STL
22h 49m2 stops
United Airlines Logo
11:20 am - 7:00 amSTL-SYD
26h 40m1 stop
$991United Airlines
Find Deal
Fri, Mar 6 - Tue, Mar 10
United Airlines Logo
11:30 am - 7:19 pmMEL-STL
24h 49m2 stops
United Airlines Logo
5:54 pm - 8:30 amSTL-MEL
46h 36m2 stops
$1,087United Airlines
Find Deal
Fri, Mar 6 - Tue, Mar 10
Delta Logo
10:10 am - 6:04 pmMEL-STL
24h 54m2 stops
Delta Logo
6:59 pm - 7:00 amSTL-MEL
44h 01m2 stops
$1,121Delta
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Fri, Mar 6 - Tue, Mar 10
Delta Logo
10:10 am - 6:04 pmMEL-STL
24h 54m2 stops
Delta Logo
5:30 pm - 7:00 amSTL-MEL
45h 30m2 stops
$1,124Delta
Find Deal
Fri, Mar 6 - Tue, Mar 10
American Airlines Logo
4:05 pm - 7:26 pmMEL-STL
20h 21m1 stop
American Airlines Logo
5:59 pm - 5:00 amSTL-MEL
43h 01m1 stop
$1,125American Airlines
Find Deal
Sun, Dec 14 - Sun, Dec 21
Qantas Airways Logo
5:45 pm - 11:57 pmSYD-STL
23h 12m1 stop
Qantas Airways Logo
6:20 am - 7:25 amSTL-SYD
32h 05m1 stop
$1,786Qantas Airways
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Sun, Apr 5 - Sat, Apr 11
Qantas Airways Logo
9:45 am - 11:09 pmMEL-STL
28h 24m1 stop
Qantas Airways Logo
6:30 am - 6:45 amSTL-MEL
33h 15m1 stop
$1,881Qantas Airways
Find Deal

Everything you should know

When to travel
November
Cheapest • 23% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$878
Typical prices: $1,130-$1,372
Air Canada
Thu 3/12Mon 3/16
SYD - STL • 2 stops
Cheapest one-way
$567
Multiple Airlines
Sun 1/18
MEL - STL • 3 stops
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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!
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 August, where tickets cost $931 on average for one-way flights. On the other hand, the most expensive months are July and January, where the average cost of tickets from Australia is $1,855 and $1,548 respectively. For return trips, the best month to travel is November with an average price of $1,031.

Good to know

Low seasonFebruary
Cheapest flight$567
Best time to beat the crowds with an average 10% 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.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Friday where tickets can be as cheap as $1,050. On the other hand, the most expensive day to fly is Saturday, where prices are $1,861 on average.

  • 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.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally in the morning, when flights cost $1,352 on average. The most expensive time of day to fly to St. Louis is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,824.

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

    Each week there are around 1,935 direct flights from within Australia to St. Louis. The most common day for departures is Thursday, 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 925 reviews
7.5Comfort
7.2Entertainment
8.2Crew
7.7Boarding
7.0Food
Airline reviews

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

6.0 GoodSandipan, Oct 2025SYD - DFW
Read more Qantas Airways reviews

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

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

A few more inches of legroom is all i ask

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.

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Flight left on time. Boarding was easy. Arrived to EWR 30 mins early. Luggage was deplaned in good time. Overall a very good experience.

Flight from Rome to SFO was excellent compared To our flight to Europe from SFO. The food was much tastier. You can see how UNITED is skimping, though. Instead of getting something mid flight you had to ask for it. It was not automatically served. There was a cookie at the end of the arrival meal, for example that tasted like it just came out of a box. They used to serve a little container of nuts, now … a tiny container of nuts, mixed with pretzels. This was business class that you really have to pay for! But this is minor complaints compared to the overall. My major complaint is the position of the even numbered seats by the windows. You have to turn around to see your window & the positioning as some other controls are harder to get at. This is compared to the odd number seat that are perfectly aligned.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

Excellent all round, first time flying United. App is very helpful.

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

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