$1,010 Find Cheap Flights from St. Louis to Australia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Australia departing on 2/3. 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

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Cheap Flights from St. Louis to Australia

Cheapest return prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney2 stops$1,450
Brisbane
Brisbane2 stops$1,423
Canberra
Canberra2 stops$2,099
Sydney
Sydney2 stops$1,450
Brisbane
Brisbane2 stops$1,423
Canberra
Canberra2 stops$2,099

Book Cheap St. Louis to Australia Plane Tickets

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

Tue, 27 Jan - Tue, 3 Feb
Multiple Airlines Logo
16:15 - 08:45
STL
-
BNE
24h 30m2 stops
Multiple Airlines Logo
10:45 - 20:58
BNE
-
STL
26h 13m2 stops
$1,423Multiple Airlines
Thu, 5 Feb - Fri, 20 Feb
Qantas Airways Logo
07:04 - 09:30
STL
-
MEL
33h 26m1 stop
Qantas Airways Logo
06:45 - 23:48
MEL
-
STL
34h 03m2 stops
$1,432Qantas Airways
Tue, 19 May - Tue, 26 May
Air Canada Logo
13:00 - 07:05
STL
-
BNE
27h 05m2 stops
Air Canada Logo
10:00 - 20:05
BNE
-
STL
25h 05m2 stops
$1,447Air Canada
Tue, 27 Jan - Tue, 3 Feb
Multiple Airlines Logo
16:15 - 08:45
STL
-
BNE
24h 30m2 stops
Multiple Airlines Logo
06:10 - 15:15
BNE
-
STL
49h 05m3 stops
$1,448Multiple Airlines
Tue, 19 May - Tue, 26 May
Air Canada Logo
14:20 - 12:00
STL
-
BNE
30h 40m3 stops
Air Canada Logo
10:00 - 20:05
BNE
-
STL
25h 05m2 stops
$1,486Air Canada
Tue, 27 Jan - Tue, 3 Feb
American Airlines Logo
11:55 - 06:30
STL
-
BNE
26h 35m1 stop
American Airlines Logo
19:40 - 23:59
BNE
-
STL
20h 19m1 stop
$1,526American Airlines
Mon, 9 Mar - Mon, 23 Mar
United Airlines Logo
15:23 - 06:30
STL
-
BNE
24h 07m2 stops
United Airlines Logo
10:40 - 22:25
BNE
-
STL
26h 45m1 stop
$1,561United Airlines
Thu, 5 Feb - Fri, 20 Feb
United Airlines Logo
11:20 - 07:30
STL
-
BNE
28h 10m2 stops
United Airlines Logo
11:40 - 22:14
BNE
-
STL
26h 34m3 stops
$1,569United Airlines
Fri, 3 Apr - Sun, 19 Apr
American Airlines Logo
07:00 - 06:00
STL
-
MEL
31h 00m1 stop
American Airlines Logo
09:45 - 19:03
MEL
-
STL
24h 18m2 stops
$1,785American Airlines
Tue, 17 Feb - Sat, 21 Feb
Cathay Pacific Logo
09:59 - 09:55
STL
-
CNS
31h 56m2 stops
Cathay Pacific Logo
11:25 - 23:48
CNS
-
STL
28h 23m2 stops
$2,604Cathay Pacific
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Australia, 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 St. Louis to Australia is August, when tickets cost $1,916 (return) on average. On the other hand, the most expensive months are December and February, when the average cost of return tickets is $2,653 and $2,270 respectively.

How far in advance should I book a flight from St. Louis to Australia?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Australia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from St. Louis to Australia, you should book around 2 weeks before departure, which saves you about 37% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Find deals

Good to know

Low seasonSeptember
Cheapest flight$1,010
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly and prices are also 4% lower on average.
Flight from St. Louis to Sydney

FAQs - booking Australia flights

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

    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 St. Louis to Australia.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from St. Louis to Australia 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 from St. Louis to Australia?

    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 from St. Louis to Australia 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 Australia?

    The cheapest time of day to fly to Australia is generally in the evening, when retur flights cost $1,883 on average. Morning departures are around 41% more expensive than evening flights, on average. The most expensive time of day to fly to Australia is generally in the morning, which is peak travel time and where the average cost of a ticket is $2,650.

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

 
Need help choosing which airline to fly with from St. Louis to Australia? 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.
7.4
United AirlinesOverall score based on 9092 reviews
7.1Entertainment
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
Airline reviews

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

10.0 ExcellentRoger, Dec 2025
CAE - ORD
Read more United Airlines reviews

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

United have really come back. Airport and boarding process is clear and good, app and information also very good

They charged a fee for 1st bag checked. Others in same party were free.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

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

Information on your arrival and departure airports

St. Louis (STL)