$506 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 8/15. 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 round-trip prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$1,287
Brisbane
Brisbane2 stops$1,316
Perth
Perth2 stops$1,637
Cairns
Cairns2 stops$1,841
Hobart
Hobart2 stops$1,564
Canberra
Canberra2 stops$1,518
Sydney
Sydney1 stop$1,287
Brisbane
Brisbane2 stops$1,316
Perth
Perth2 stops$1,637
Cairns
Cairns2 stops$1,841
Hobart
Hobart2 stops$1,564
Canberra
Canberra2 stops$1,518

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 round-trip 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 round-trip flight deals from St. Louis to Australia

lun., jun. 8 - lun., jun. 15
American Airlines Logo
7:03 am - 5:00 am
STL
-
MEL
30h 57m
1 stop
American Airlines Logo
9:45 am - 11:56 pm
MEL
-
STL
29h 11m
1 stop
$1,266American Airlines
lun., jun. 8 - lun., jun. 15
American Airlines Logo
1:19 pm - 6:45 am
STL
-
MEL
26h 26m
2 stops
American Airlines Logo
9:45 am - 11:56 pm
MEL
-
STL
29h 11m
1 stop
$1,271American Airlines
mié., jun. 10 - mié., jun. 17
United Airlines Logo
3:10 pm - 7:30 am
STL
-
MEL
25h 20m
2 stops
United Airlines Logo
9:30 am - 8:43 pm
MEL
-
STL
26h 13m
2 stops
$1,282United Airlines
jue., oct. 15 - jue., nov. 5
Qantas Airways Logo
6:30 am - 6:45 am
STL
-
MEL
32h 15m
1 stop
Qantas Airways Logo
1:55 pm - 12:37 pm
MEL
-
STL
39h 42m
2 stops
$1,286Qantas Airways
sáb., oct. 24 - lun., nov. 2
Qantas Airways Logo
6:30 am - 9:00 am
STL
-
SYD
34h 30m
1 stop
Qantas Airways Logo
5:50 pm - 12:37 pm
SYD
-
STL
35h 47m
2 stops
$1,287Qantas Airways
dom., jun. 7 - sáb., jun. 13
United Airlines Logo
7:23 pm - 8:15 am
STL
-
MEL
21h 52m
1 stop
United Airlines Logo
10:00 am - 6:17 pm
MEL
-
STL
47h 17m
2 stops
$1,298United Airlines
sáb., sep. 26 - sáb., oct. 10
Multiple Airlines Logo
6:51 pm - 7:20 pm
STL
-
MEL
33h 29m
2 stops
Multiple Airlines Logo
7:30 am - 10:00 pm
MEL
-
STL
30h 30m
2 stops
$1,302Multiple Airlines
mié., may. 27 - mié., jun. 3
Multiple Airlines Logo
1:05 pm - 7:20 am
STL
-
SYD
51h 15m
3 stops
Multiple Airlines Logo
9:20 am - 6:17 pm
SYD
-
STL
23h 57m
2 stops
$1,385Multiple Airlines
dom., oct. 18 - dom., nov. 1
Air Canada Logo
12:10 pm - 7:05 am
STL
-
BNE
27h 55m
2 stops
Air Canada Logo
10:45 am - 4:30 pm
BNE
-
STL
44h 45m
2 stops
$1,423Air Canada
sáb., may. 30 - mié., jun. 3
Air Canada Logo
7:05 am - 7:45 pm
STL
-
HBA
45h 40m
3 stops
Air Canada Logo
8:25 pm - 8:09 pm
HBA
-
STL
38h 44m
3 stops
$2,590Air Canada
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 May, when tickets cost $310 (return) on average. On the other hand, the most expensive months are June and September, when the average cost of round-trip tickets is $1,225 and $1,179 respectively.

Good to know

Low seasonMarch
Cheapest flight$506
Best time to beat the crowds with an average 1% drop in price.
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 travelers 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 round-trip 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.

Reviews of the top 5 airlines serving 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.
8.1
Fiji AirwaysOverall score based on 240 reviews
8.2Boarding
8.6Crew
7.5Food
7.5Entertainment
8.1Comfort
Airline reviews

I thought Fiji and Fiji Airways was great. Looking forward to the next trip. Baggage claim at the end went to sh...t

8.0 ExcellentJoseph, Apr 2026
NAN - HNL
Read more Fiji Airways reviews

I thought Fiji and Fiji Airways was great. Looking forward to the next trip. Baggage claim at the end went to sh...t

Fiji Airways always goes above and beyond. If anything I'd say the food was less enjoyable than in the past. But that in no way lessened the experience with the cabin crew or the excellent attentiveness and service they provided throughout the entire trip!

Left on time , arrived on time. Staff was awesome!!!!! Great flight!!!!

Great food, wonderful staff made a long flight seem short

Everything was great . Arrived on time was smooth plane was clean. Crew/Staff was friendly and helpful.

Everything from the staff to the comfort of business class was excellent. This is one of my new favorite airlines.

Ticketing said dinner for the almost 14 hour flight and we were delayed an hour. However, onboard we were only served a sluce if pizza bread and a cookie. Not at all dinner and insufficient for a long international flight. Breakfast was good.

We have had an absolutely horrific experience so far getting home from Australia on a $18,000 + flight we booked with you. The flight did not deplane in Dallas because there was no available gate or staircase. We sat in the plane for 3 hours waiting to deplane. As a result we missed our connecting flight to New York. American Airlines put us up in a hotel several miles away. We waited 45 minutes for a shuttle and The shuttle driver was horribly rude and unhelpful. They offered us $70 vouchers for food but actually there was no food left when we arrived minus some chicken nuggets and corn dogs. It was awful. Horrible way to end a vacation. There has to be accountability here.

A bit cramped in economy and the people in front wouldn’t put their seats up during meal service, crew did not help with that and I felt they could have done more about it.

The airline is ok, but it needs to improve it schedules.

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

Very good overall. However, your choices of free movies was limited and there was no music Channel???

I couldn't hear all of the announcements. It was nice when they put them on the screen.

This was the worst flight I’ve been on. Getting on the plane where is was 30 degrees outside was hotter on board cabin must’ve been 33 degrees. This is a health hazard. They cannot be doing this to save on fuel. People could die from this!!. Fans and a/c was, off entertainment was off. Poor excuse given. Crew made the excuse that the system didn’t have enough power. They basically were operating on one engine to save on jet fuel till 3 hours later on cruising altitude and they then started the second engine. And finally the cabin was cooled. On a 7hour red eye flight this made it so uncomfortable and impossible to sleep.

My experience was great overall. Tanya was particularly friendly and helpful the entire trip. I was very pleased with her customer service skills. The plane was an older aircraft but the entire way was comfortable with barely any turbulence at all. Qantas should speed up its fleet renovation. Totally recommend using this airline.

Qantas is always subpar beyond comfy chairs for a domestic flight

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

an hour late, then had to disembark on back stairs and take 4 flights up to get to main airport. No warning, and difficulty for those with canes and poor knees.

Well my expórtenle with Qantas it wasn’t that good KLM from Bs Aires was delay Santiago Chile Qantas QF 028 was still in the airport but the crew didn’t opened the door for me soo I lost my fly And I stuck in the airport 13 hrs waiting for next fly by Latam Arline My question is can I have my money back for business class

It was ok, the additional baggage charges were a bit excessive given winter is a time for skiing. To have to pay $600 extra for skis was tantamount to robbery. Airlines should consider sporting goods as baggage. Likewise, they should consider increasing the number of bags allowed on international flights to known ski destinations.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Flying in the United States with the major airlines has become so underwhelming. A 2-3hr flight in most other parts of the world with the major carriers of the area comes with newer, CLEANER aircraft and significantly better in flight service in terms of both staff attitude and a actual meal service.

On time departure and early arrival. Flight attendant very nice.

shittiest airline in the hemisphere. To improve - start thinking you're flying people, not cattle

Easy boarding, inflight refreshments came on time and comfortable seat

It was good that our flight left early. It was a nice smooth flight and landing.

All good……but luggage didn’t make it on the airplane. Had to wait 3 days. Was a bummer.

Small suitcase used for carryon the last time was refused by boarding crew this time. Appears to be at the discretion and mood of the person on the day. Flight was only half booked, there would have been no problem with space.

It was a problem because there was a delay where we sat before taking off from newark,then when landed in Toronto we sat on tarmac and they wouldn't let us out for a long period of time. When we finally were released to the airport in Toronto the attendant scanned our boarding pass that we were here for our connection to Brazil. We ran all the way to the gate and they said at the gate the door is shut so we can not let you on the plane. We explained that we were checked in by the attendant when we arrived at Toronto airport to go to Brazil and they should not have shut the door. We were ignored at the gate

Flight home was delayed multiple times, did not get home until 2am

the check-in lady at ORD was extremely rude and unprofessional. very disappointed as it was supposed to be a celebration for my wife's birthday and it really put a damper on things. if i wanted to be treated like trash, i would have flown Economy! (as opposed to business class)

My original flight was cancelled and then rebooked four hours later on a recovery flight, but I was checked in as stanby and had no seats so as a family of four we were concerned about not being seated altogether. Our flight then got delayed by another 1.5 hours and when seats were assigned at the gate, three of the four of us were together and we could get my wife closer, they offered no assistance.

My original booking was through AirCanada and unbeknownst to me they altered flights and providers which caused a complete disaster for checking in for my flights and seat assignments. The original gate agent in Auckland had me basically doing gymnastics to get onto the future flights and have my luggage follow me.

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

Information on your arrival and departure airports