$489 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 8/5. 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, May 6 - Wed, May 13
Air Canada Logo
8:30 pm - 8:09 pm
MEL
-
STL
38h 39m
3 stops
Air Canada Logo
2:15 pm - 11:35 am
STL
-
MEL
30h 20m
3 stops
$1,110Air Canada
Wed, May 6 - Wed, May 13
American Airlines Logo
9:45 am - 11:57 pm
MEL
-
STL
29h 12m
1 stop
American Airlines Logo
12:27 pm - 5:00 am
STL
-
MEL
25h 33m
1 stop
$1,126American Airlines
Sat, May 23 - Sat, May 30
Qantas Airways Logo
1:35 pm - 6:30 pm
MEL
-
STL
19h 55m
1 stop
Qantas Airways Logo
5:11 pm - 5:00 am
STL
-
MEL
20h 49m
1 stop
$1,131Qantas Airways
Sat, May 23 - Sat, May 30
American Airlines Logo
9:45 am - 5:34 pm
MEL
-
STL
22h 49m
2 stops
American Airlines Logo
1:45 pm - 6:45 am
STL
-
MEL
26h 00m
2 stops
$1,136American Airlines
Wed, May 6 - Wed, May 13
United Airlines Logo
10:55 am - 10:30 pm
MEL
-
STL
26h 35m
2 stops
United Airlines Logo
4:44 pm - 7:30 am
STL
-
MEL
23h 46m
2 stops
$1,137United Airlines
Wed, May 6 - Wed, May 13
Delta Logo
10:00 am - 11:35 pm
MEL
-
STL
28h 35m
2 stops
Delta Logo
10:19 am - 7:50 am
STL
-
MEL
30h 31m
2 stops
$1,144Delta
Wed, May 6 - Wed, May 13
American Airlines Logo
8:00 am - 5:21 pm
MEL
-
STL
24h 21m
2 stops
American Airlines Logo
2:37 pm - 6:45 am
STL
-
MEL
25h 08m
2 stops
$1,156American Airlines
Wed, May 6 - Wed, May 13
Multiple Airlines Logo
8:50 pm - 8:09 pm
MEL
-
STL
38h 19m
3 stops
Multiple Airlines Logo
2:15 pm - 11:20 am
STL
-
MEL
30h 05m
3 stops
$1,157Multiple Airlines
Fri, May 29 - Tue, Jun 2
Air Canada Logo
6:00 am - 12:06 pm
MEL
-
STL
45h 06m
3 stops
Air Canada Logo
2:15 pm - 11:05 am
STL
-
MEL
29h 50m
3 stops
$1,168Air Canada
Fri, May 29 - Tue, Jun 2
Air Canada Logo
6:00 am - 12:06 pm
MEL
-
STL
45h 06m
3 stops
Air Canada Logo
8:40 am - 11:35 am
STL
-
MEL
35h 55m
3 stops
$1,185Air 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 72 hours.

In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Melbourne, at $1,110 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $294 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 $1,649 and $1,640 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$489
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 Melbourne 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 Melbourne, at $1,110 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $294 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 1,497 direct flights from within Australia to St. Louis. The most common day for departures is Sunday, 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 9562 reviews
7.3Comfort
8.1Crew
6.6Food
7.1Entertainment
7.7Boarding
Airline reviews

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

10.0 ExcellentDr. Joseph, Apr 2026
IAH - ORD
Read more United Airlines reviews

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

This was the first flight in the morning. We boarded fine. The cabin door was closed and we were ready to go. We were notified by the Captain that ATC issued and ground stop for 40 minutes. So, without even pushing back from the gate, we were already 40 minutes late. We actually were released to push-back and taxi at 30 minutes. But, some passengers had tight connections and were not going to make their connections. Some passengers asked about the delay and the effect on the connections and were told by the cabin attendant that all flights will be delayed and so they should be OK. However, that was not true. My connecting flight was on time and I arrived at IAH with 21 minutes to make my connection. I did and I'm happy about that, but the flight crew should not have given assurances to the passengers who might have missed their connections.

Poor communication, flight was delayed for preventable reasons. I missed my connection.

It was better than excellent. The staff in Mason City were great. The young woman that pushed my wheelchair did more than could be expected of her. She came from India 17 years ago. I don't remember her name.

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

The crew was generally professional. Though one of the crew members seemed to be easily annoyed, the others were fine and helpful. The green olives and almonds snack was really good. A great idea, and nice balance of tastes.

It as confusing with the connections and I almost missed my next flight because of the first delay with the first flight. United could have helped passengers go through immigration quicker rather than waiting with everyone else. The flight attendants were super friendly and lovely. The vegetarian food was awful- I did not finish. I would suggest they just do pasta next time

Flights were on time actually early service was good and crew cheerful

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

I had a terrible experience. My flight got delayed from Atlanta to Chicago on Monday April 6, 2026, and that led to me missing my next flight to Brussels. United Airlines didn’t provide me with any accommodation for shelter. I had to sleep at the airport in Chicago. The next flight I was put on didn’t leave until the evening hours of Tuesday 4/7/2026.

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