$775 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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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, May 20 - Thu, May 28
Air Canada Logo
9:20 am - 12:06 pm
SYD
-
STL
65h 46m
2 stops
Air Canada Logo
7:05 am - 7:20 am
STL
-
SYD
33h 15m
2 stops
$946Air Canada
Thu, Apr 30 - Thu, May 7
Air Canada Logo
6:00 am - 12:06 pm
MEL
-
STL
45h 06m
3 stops
Air Canada Logo
2:20 pm - 11:05 am
STL
-
MEL
29h 45m
3 stops
$948Air Canada
Wed, Apr 15 - Wed, Apr 22
Qantas Airways Logo
1:35 pm - 7:30 pm
MEL
-
STL
20h 55m
1 stop
Qantas Airways Logo
6:21 am - 6:45 am
STL
-
MEL
33h 24m
1 stop
$972Qantas Airways
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
1:35 pm - 10:59 pm
MEL
-
STL
24h 24m
1 stop
American Airlines Logo
2:37 pm - 6:45 am
STL
-
MEL
25h 08m
2 stops
$977American Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
8:50 pm - 3:25 pm
MEL
-
STL
57h 35m
3 stops
Multiple Airlines Logo
2:20 pm - 11:25 am
STL
-
MEL
30h 05m
3 stops
$989Multiple Airlines
Fri, Jul 31 - Sun, Sep 6
Multiple Airlines Logo
6:00 am - 2:02 pm
MEL
-
STL
47h 02m
3 stops
Multiple Airlines Logo
2:40 pm - 11:25 am
STL
-
MEL
29h 45m
3 stops
$994Multiple Airlines
Tue, Apr 28 - Tue, May 5
United Airlines Logo
10:55 am - 6:24 pm
MEL
-
STL
22h 29m
1 stop
United Airlines Logo
8:30 am - 8:15 am
STL
-
MEL
32h 45m
1 stop
$995United Airlines
Mon, Apr 27 - Mon, May 4
Qantas Airways Logo
1:35 pm - 7:30 pm
MEL
-
STL
20h 55m
1 stop
Qantas Airways Logo
3:38 pm - 5:00 am
STL
-
MEL
22h 22m
1 stop
$1,000Qantas Airways
Mon, Apr 27 - Mon, May 4
United Airlines Logo
10:55 am - 9:25 am
MEL
-
STL
37h 30m
2 stops
United Airlines Logo
7:06 pm - 8:15 am
STL
-
MEL
22h 09m
1 stop
$1,005United Airlines
Thu, Apr 30 - Thu, May 7
American Airlines Logo
8:15 am - 5:21 pm
MEL
-
STL
24h 06m
2 stops
American Airlines Logo
6:21 am - 6:45 am
STL
-
MEL
33h 24m
1 stop
$1,007American Airlines
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 $946 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $285 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 May, where tickets cost $1,108 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 $1,740 and $1,640 respectively. For one-way flights, the best month to travel is January with an average price of $837.

Good to know

Low seasonFebruary
Cheapest flight$775
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 9% 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 $946 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $285 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 2,431 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 9431 reviews
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
6.6Food
Airline reviews

OK, we were delayed and had to de plane and reboard.

6.0 GoodJamie, Mar 2026
LAX - EWR
Read more United Airlines reviews

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Hopped on time for the flight only to get deplaned and delayed another 2.5 hours.

Terrible experience! delay 2 time and say i dont have ticket

Both my flight where delayed Had 25min to make it to my transfer flight

Would've been great if Lufthansa union cockpit pilots didn't strike for 2 days and caused a chaos to my returning plans to USA, and then after rebooking a flight 2 days later tge plane departed 35 min later. So I did not have a good experience.

Everything was on time and service on the flight was great!

The boarding in Buenos Aires (at the on ramp) was not great. They had to check every carry on. Not a United problem but was a Buenos Aires problem.

Staff and aircraft were good. However, weather in Houston lee to a ground stop. We were looking at circling behind three other planes until the stop was lifted. Pilot said we didn’t have enough fuel for that. So we flew on to New Orleans as the closest port with immigration and customs staff. Landed there and sat in the plane for two hours plus while staff was sorted. Turned away by ICE. Waited for pilots to be switched out, but after they were approved by ICE. Then had to wait to get a runway because so many planes were ahead of us. Finally took off and flew back to Houston. We all missed our connecting flights because it took too long. Hotel voucher from United was only a link to booking site. Total BS. Finally got a flight out the next day after a night without sleep because all the Houston hotels were booked by rodeo and spring break crowds.

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