$556 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 6/2. 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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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

Wed, Mar 18 - Sun, Mar 22
United Airlines Logo
12:00 pm - 9:07 pm
MEL
-
STL
25h 07m
2 stops
United Airlines Logo
6:51 am - 9:00 am
STL
-
MEL
34h 09m
1 stop
$892United Airlines
Wed, Mar 18 - Sun, Mar 22
United Airlines Logo
12:00 pm - 11:34 pm
MEL
-
STL
27h 34m
2 stops
United Airlines Logo
8:17 am - 9:00 am
STL
-
MEL
32h 43m
2 stops
$893United Airlines
Wed, Mar 18 - Sun, Mar 22
United Airlines Logo
12:00 pm - 9:07 pm
MEL
-
STL
25h 07m
2 stops
United Airlines Logo
6:00 am - 8:30 am
STL
-
MEL
34h 30m
2 stops
$897United Airlines
Wed, Mar 18 - Sun, Mar 22
United Airlines Logo
10:30 am - 8:41 pm
MEL
-
STL
26h 11m
2 stops
United Airlines Logo
6:00 am - 8:30 am
STL
-
MEL
34h 30m
2 stops
$898United Airlines
Wed, Mar 18 - Sun, Mar 22
American Airlines Logo
4:05 pm - 7:29 pm
MEL
-
STL
19h 24m
1 stop
American Airlines Logo
6:38 am - 9:30 am
STL
-
MEL
34h 52m
1 stop
$953American Airlines
Wed, Mar 18 - Sun, Mar 22
American Airlines Logo
4:05 pm - 7:29 pm
MEL
-
STL
19h 24m
1 stop
American Airlines Logo
6:38 am - 9:30 am
STL
-
MEL
34h 52m
1 stop
$955American Airlines
Thu, Aug 6 - Sun, Aug 30
Qantas Airways Logo
12:00 pm - 4:51 pm
SYD
-
STL
19h 51m
1 stop
Qantas Airways Logo
7:46 pm - 6:55 am
STL
-
SYD
20h 09m
1 stop
$1,063Qantas Airways
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
1:30 pm - 11:57 pm
MEL
-
STL
25h 27m
2 stops
Multiple Airlines Logo
6:21 am - 10:35 pm
STL
-
MEL
49h 14m
2 stops
$1,154Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Qantas Airways Logo
9:00 am - 7:30 pm
MEL
-
STL
25h 30m
2 stops
Qantas Airways Logo
3:38 pm - 5:00 am
STL
-
MEL
22h 22m
1 stop
$1,253Qantas Airways
Mon, Apr 13 - Mon, Apr 20
Air Canada Logo
8:30 pm - 3:25 pm
MEL
-
STL
57h 55m
3 stops
Air Canada Logo
4:05 pm - 11:35 am
STL
-
MEL
52h 30m
3 stops
$1,328Air 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 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 $825 on average for one-way flights. On the other hand, the most expensive months are July and April, where the average cost of tickets from Australia is $1,937 and $1,631 respectively. For return trips, the best month to travel is August with an average price of $1,153.

Good to know

Low seasonAugust
Cheapest flight$556
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Melbourne 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.

  • 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 1,519 direct flights from within Australia to St. Louis. The most common day for departures is Friday, with 15% 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 9349 reviews
7.3Comfort
8.1Crew
7.7Boarding
7.1Entertainment
6.6Food
Airline reviews

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

8.0 ExcellentJack, Feb 2026
SFO - PDX
Read more United Airlines reviews

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Poor. Crew allowed children to run around and scream and disturb passanger’s seats.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was tired as we all were. Pretty abrupt. Flight was delayed. Not as enjoyable as the other 3 legs we flew.

Flight attendants were friendly & good service, food sucks, seats uncomfortable, not many Asian movies or shows flying from Hong Kong

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Given I (and I’m assuming most people) have both carry in and a personal item included in their fare, I find it very unfair that on neither of my flights I was able to use the overhead for my small backpack because they were completely rammed with luggage, people personal items, jackets, hats and other items. So the only item I brought in had to be stuffed under my seat while they had their leg room and sat comfortable with all of their items in the overhead. This has to stop because I was uncomfortable on both flights when I only had one smaller item that could not be checked due to its contents (medication etc). Plenty of people could have checked theirs but chose not to and then took up the space allotment for 2 people.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

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