$510 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 12/16. 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

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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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, Mar 12 - Mon, Mar 16
Air Canada Logo
10:20 am - 3:29 pmSYD-STL
45h 09m2 stops
Air Canada Logo
4:05 pm - 8:35 amSTL-SYD
48h 30m2 stops
$810Air Canada
Find Deal
Thu, Mar 12 - Mon, Mar 16
Air Canada Logo
10:20 am - 3:29 pmSYD-STL
45h 09m2 stops
Air Canada Logo
1:30 pm - 8:35 amSTL-SYD
27h 05m2 stops
$817Air Canada
Find Deal
Sun, Nov 2 - Sun, Nov 9
American Airlines Logo
11:20 am - 12:42 amSYD-STL
29h 22m1 stop
American Airlines Logo
7:00 am - 9:00 amSTL-SYD
33h 00m1 stop
$845American Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
United Airlines Logo
12:00 pm - 4:27 pmMEL-STL
20h 27m1 stop
United Airlines Logo
9:00 am - 10:00 amSTL-MEL
32h 00m2 stops
$846United Airlines
Find Deal
Sun, Nov 2 - Sun, Nov 9
American Airlines Logo
11:20 am - 12:42 amSYD-STL
29h 22m1 stop
American Airlines Logo
2:29 pm - 9:00 amSTL-SYD
25h 31m2 stops
$849American Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
United Airlines Logo
11:50 am - 3:50 pmSYD-STL
20h 00m1 stop
United Airlines Logo
4:43 pm - 9:15 amSTL-SYD
47h 32m2 stops
$852United Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Multiple Airlines Logo
7:00 pm - 4:29 pmMEL-STL
61h 29m3 stops
Multiple Airlines Logo
4:05 pm - 6:35 pmSTL-MEL
57h 30m3 stops
$974Multiple Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
Multiple Airlines Logo
11:45 am - 6:47 pmSYD-STL
23h 02m2 stops
Multiple Airlines Logo
9:00 am - 8:45 amSTL-SYD
30h 45m3 stops
$1,293Multiple Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Qantas Airways Logo
12:00 pm - 11:05 pmMEL-STL
27h 05m1 stop
Qantas Airways Logo
6:03 pm - 5:00 amSTL-MEL
41h 57m1 stop
$1,768Qantas Airways
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Thu, Nov 20 - Mon, Nov 24
Qantas Airways Logo
11:00 am - 11:42 pmLST-STL
29h 42m2 stops
Qantas Airways Logo
7:00 am - 7:50 pmSTL-LST
43h 50m2 stops
$2,243Qantas Airways
Find Deal

Everything you should know

When to travel
November
Cheapest • 25% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$810
Typical prices: $1,130-1372
Air Canada
Thu 3/12Mon 3/16
SYD - STL • 2 stops
Cheapest one-way
$510
Typical prices: $2,243-4019
United Airlines
Tue 12/16
SYD - STL • 2 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 November, where tickets cost $1,031 on average for return flights. On the other hand, the most expensive months are January and December, where the average cost of tickets from Australia is $1,626 and $1,619 respectively. For one-way flights, the best month to travel is August with an average price of $931.

Good to know

Low seasonAugust
Cheapest flight$510
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 10% 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.

  • 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 round-trip tickets can be as cheap as $1,050. On the other hand, the most expensive day to fly is Saturday, where round-trip 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 round-trip 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 2,400 direct flights from within Australia to St. Louis. The most common day for departures is Sunday, 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 907 reviews
7.7Boarding
7.2Entertainment
7.0Food
7.5Comfort
8.2Crew
Airline reviews

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.

2.0 MediocreAnonymous, Aug 2025BDL - DFW
Read more Qantas Airways reviews

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.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

We were upgraded and after just a short delay in attending to a safety check we were on our way. Would definately fly Qantas International on their Dreamliner again.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

Terrible. They wouldn't allow me on my flight on the 14th..

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good 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
Glencoe
Shrewsbury

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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