$629 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 5/25. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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, Jun 11 - Wed, Jun 17
Air Canada Logo
9:20 am - 4:33 pm
SYD
-
STL
22h 13m
2 stops
Air Canada Logo
4:48 pm - 7:20 am
STL
-
SYD
23h 32m
2 stops
$1,036Air Canada
Wed, Aug 12 - Sat, Sep 5
United Airlines Logo
9:30 am - 5:06 pm
SYD
-
STL
22h 36m
2 stops
United Airlines Logo
4:40 pm - 6:55 am
STL
-
SYD
47h 15m
2 stops
$1,042United Airlines
Wed, Aug 12 - Sat, Sep 5
United Airlines Logo
10:20 am - 6:39 pm
SYD
-
STL
23h 19m
1 stop
United Airlines Logo
5:59 pm - 6:55 am
STL
-
SYD
45h 56m
2 stops
$1,045United Airlines
Wed, Aug 12 - Sat, Sep 5
Qantas Airways Logo
12:00 pm - 4:41 pm
SYD
-
STL
19h 41m
1 stop
Qantas Airways Logo
5:11 pm - 6:55 am
STL
-
SYD
22h 44m
1 stop
$1,059Qantas Airways
Wed, Jun 3 - Sun, Jun 7
American Airlines Logo
9:10 am - 11:56 pm
SYD
-
STL
29h 46m
1 stop
American Airlines Logo
2:58 pm - 6:25 am
STL
-
SYD
24h 27m
2 stops
$1,060American Airlines
Wed, Aug 12 - Sat, Sep 5
Qantas Airways Logo
5:50 pm - 10:55 pm
SYD
-
STL
20h 05m
1 stop
Qantas Airways Logo
5:11 pm - 6:55 am
STL
-
SYD
22h 44m
1 stop
$1,075Qantas Airways
Wed, Aug 12 - Sat, Sep 5
United Airlines Logo
10:20 am - 6:39 pm
SYD
-
STL
23h 19m
1 stop
United Airlines Logo
3:13 pm - 7:00 am
STL
-
SYD
24h 47m
2 stops
$1,081United Airlines
Wed, Aug 12 - Sat, Sep 5
American Airlines Logo
9:10 am - 10:55 pm
SYD
-
STL
28h 45m
1 stop
American Airlines Logo
5:11 pm - 6:55 am
STL
-
SYD
22h 44m
1 stop
$1,088American Airlines
Wed, Aug 12 - Sat, Sep 5
Air Canada Logo
9:20 am - 6:42 pm
SYD
-
STL
48h 22m
3 stops
Air Canada Logo
12:10 pm - 7:20 am
STL
-
SYD
52h 10m
3 stops
$1,089Air Canada
Wed, Jun 10 - Sun, Jun 21
Delta Logo
10:00 am - 12:43 am
MEL
-
STL
29h 43m
2 stops
Delta Logo
3:57 pm - 7:50 am
STL
-
MEL
48h 53m
2 stops
$1,506Delta
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 flight to St. Louis?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Sydney, at $1,036 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $306 in the last 3 days.

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 September, where tickets cost $948 on average for return flights. On the other hand, the most expensive months are July and April, where the average cost of tickets from Australia is $1,789 and $1,627 respectively. For one-way flights, the best month to travel is June with an average price of $820.

Good to know

Low seasonFebruary
Cheapest flight$629
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Sydney to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Sydney, at $1,036 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $306 in the last 3 days.

  • 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 2,635 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 airline 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.
7.4
United AirlinesOverall score based on 9730 reviews
7.3Comfort
8.1Crew
7.7Boarding
6.6Food
7.1Entertainment
Airline reviews

Horrible, absolutely horrible. The airline overbooked the flight, did NOT assign seats and boarding was a hot mess with lots of confused passengers. There was no "large plane" gate for us, the 500+ passengers were squeezed in a small hold room area, and multiple busses had to shuttle us to the other side of the airfield, where boarding of the plane, that was parked on the ramp, took place in rain. The old plane had a broken seat, that the technicians tried to fix - with no success - resulting in a 50min delay. The flight attendant with heart shaped earnings with German flag was screaming on the passengers without a reason, was extremely rude and entitled the entire flight. The food was junk. I hope I don't have to fly United ever again.

2.0 MediocreAnonymous, May 2026
MUC - IAH
Read more United Airlines reviews

Horrible, absolutely horrible. The airline overbooked the flight, did NOT assign seats and boarding was a hot mess with lots of confused passengers. There was no "large plane" gate for us, the 500+ passengers were squeezed in a small hold room area, and multiple busses had to shuttle us to the other side of the airfield, where boarding of the plane, that was parked on the ramp, took place in rain. The old plane had a broken seat, that the technicians tried to fix - with no success - resulting in a 50min delay. The flight attendant with heart shaped earnings with German flag was screaming on the passengers without a reason, was extremely rude and entitled the entire flight. The food was junk. I hope I don't have to fly United ever again.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

The clerk at check in for my bags was very rude. My credit card was hacked during my vacation and she told me it was not possible to pay in cash for my bag. “You bought the cheapest ticket, you should have bought a ticket that included a bag. If you cannot pay with a credit card, we will not let you on this flight”. She spoke to her supervisor and then told me , I could ask other passengers, if they would use their credit card to check my bag. I had to beg 5 different people, till one agreed to use their credit card. I payed them cash of course. This was a very stressful and humiliating experience for me. I strongly suggest you build in some kind of provision for travelers who got robbed.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

No screens or meal options. Freezing cold. Dirty seats. Left late.

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