$635 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 6/8. 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

Wed, Jun 10 - Wed, Jun 17
United Airlines Logo
9:30 am - 9:10 pm
SYD
-
STL
26h 40m
2 stops
United Airlines Logo
7:23 pm - 6:55 am
STL
-
SYD
20h 32m
1 stop
$1,028United Airlines
Wed, Jul 8 - Mon, Jul 20
United Airlines Logo
9:30 am - 6:13 pm
SYD
-
STL
23h 43m
2 stops
United Airlines Logo
5:10 am - 6:55 am
STL
-
SYD
34h 45m
2 stops
$1,029United Airlines
Wed, Jun 10 - Wed, Jun 17
American Airlines Logo
12:00 pm - 11:59 pm
SYD
-
STL
26h 59m
1 stop
American Airlines Logo
6:35 am - 7:05 am
STL
-
SYD
33h 30m
1 stop
$1,034American Airlines
Mon, Aug 10 - Fri, Sep 4
Air Canada Logo
9:20 am - 6:42 pm
SYD
-
STL
48h 22m
2 stops
Air Canada Logo
8:55 am - 7:20 am
STL
-
SYD
31h 25m
2 stops
$1,046Air Canada
Mon, Aug 10 - Fri, Sep 4
Qantas Airways Logo
12:00 pm - 6:14 pm
SYD
-
STL
21h 14m
1 stop
Qantas Airways Logo
3:32 pm - 6:55 am
STL
-
SYD
24h 23m
1 stop
$1,058Qantas Airways
Mon, Aug 10 - Fri, Sep 4
Qantas Airways Logo
12:00 pm - 6:14 pm
SYD
-
STL
21h 14m
1 stop
Qantas Airways Logo
3:32 pm - 6:55 am
STL
-
SYD
24h 23m
1 stop
$1,069Qantas Airways
Mon, Aug 10 - Fri, Sep 4
Qantas Airways Logo
12:00 pm - 6:10 pm
SYD
-
STL
21h 10m
1 stop
Qantas Airways Logo
5:11 pm - 6:55 am
STL
-
SYD
22h 44m
1 stop
$1,076Qantas Airways
Fri, Jun 5 - Sat, Jun 13
American Airlines Logo
5:50 pm - 11:56 pm
SYD
-
STL
21h 06m
1 stop
American Airlines Logo
2:58 pm - 7:05 am
STL
-
SYD
25h 07m
2 stops
$1,117American Airlines
Thu, Oct 15 - Sat, Nov 7
Multiple Airlines Logo
7:00 am - 8:00 pm
MEL
-
STL
29h 00m
3 stops
Multiple Airlines Logo
4:15 pm - 1:35 pm
STL
-
MEL
52h 20m
3 stops
$1,578Multiple Airlines
Mon, Sep 7 - Sun, Sep 27
Air Canada Logo
8:30 pm - 8:00 pm
MEL
-
STL
38h 30m
3 stops
Air Canada Logo
8:55 am - 11:05 am
STL
-
MEL
35h 10m
3 stops
$1,641Air Canada
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 7 days.

In the last 7 days, the cheapest flight deal to St. Louis was found on the route from Sydney, at $1,028 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $312 in the last 7 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 $1,659 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$635
Best time to beat the crowds with an average 17% 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 7 days, the cheapest flight deal to St. Louis was found on the route from Sydney, at $1,028 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $312 in the last 7 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 3,096 direct flights from within Australia to St. Louis. The most common day for departures is Sunday, with 19% 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 9749 reviews
8.1Crew
7.7Boarding
6.6Food
7.3Comfort
7.1Entertainment
Airline reviews

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

6.0 GoodRoger, May 2026
ONT - SFO
Read more United Airlines reviews

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

Broken tray table. Erratic service. Premium economy is more economy than premium- other airlines treat PE much better. No lounge access.

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

We had a delay, but thankfully I made it to my connection. Overall it went smooth

The flight had a delay but I made it to my connection. Flight was smooth overall

As I wrote earlier, poor planning and/or communication. At least twice, we were told that we would be boarding in less than ten minutes, only to have the flight again delayed at least another hour.

Our flight from Nice to Newark ran an hour late, and the food was mediocre, but it was fine. The problem was that we were scheduled to have a 4.5-hour layover in Newark, but then our flight to RDU was almost four hours late, finally departing at almost 11:30 p.m. We understand that flight delays were caused by weather problems in the East. However, there were at least two times, when were told that we would begin boarding in just a few minutes, only to have the flight delayed another 1.0-1.5 hours. This meant that we would leave a restaurant or the United Club, go to the gate, only to learn that there would be another major delay. Poor planning and/or communication.

This flight is a quick way to get to Chicago, but a bit expensive.

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