$639 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 7/30. 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
Delta Logo
9:15 am - 9:38 pm
SYD
-
STL
27h 23m
2 stops
Delta Logo
10:49 am - 6:50 am
STL
-
SYD
29h 01m
2 stops
$1,087Delta
Wed, May 27 - Wed, Jun 3
Qantas Airways Logo
9:45 am - 11:56 pm
MEL
-
STL
29h 11m
1 stop
Qantas Airways Logo
6:35 am - 6:45 am
STL
-
MEL
33h 10m
1 stop
$1,107Qantas Airways
Thu, May 28 - Thu, Jun 4
American Airlines Logo
9:45 am - 11:56 pm
MEL
-
STL
29h 11m
1 stop
American Airlines Logo
2:37 pm - 6:45 am
STL
-
MEL
25h 08m
2 stops
$1,112American Airlines
Sun, Jun 14 - Sun, Jun 21
American Airlines Logo
9:45 am - 9:37 pm
MEL
-
STL
26h 52m
2 stops
American Airlines Logo
1:45 pm - 6:45 am
STL
-
MEL
26h 00m
2 stops
$1,130American Airlines
Sun, Jun 14 - Sun, Jun 21
Qantas Airways Logo
9:45 am - 11:56 pm
MEL
-
STL
29h 11m
1 stop
Qantas Airways Logo
7:24 pm - 5:00 am
STL
-
MEL
42h 36m
1 stop
$1,132Qantas Airways
Wed, May 20 - Thu, May 28
Multiple Airlines Logo
9:20 am - 12:06 pm
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
4:48 pm - 7:20 am
STL
-
SYD
23h 32m
2 stops
$1,163Multiple Airlines
Wed, May 20 - Thu, May 28
Air Canada Logo
9:20 am - 8:25 pm
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
7:05 am - 7:20 am
STL
-
SYD
33h 15m
2 stops
$1,171Air Canada
Sun, Jun 14 - Sun, Jun 21
Air Canada Logo
9:20 am - 8:25 pm
SYD
-
STL
50h 05m
2 stops
Air Canada Logo
1:20 pm - 7:20 am
STL
-
SYD
51h 00m
2 stops
$1,198Air Canada
Tue, Jun 2 - Tue, Jun 9
United Airlines Logo
10:20 am - 6:17 pm
SYD
-
STL
22h 57m
1 stop
United Airlines Logo
4:48 pm - 6:55 am
STL
-
SYD
23h 07m
2 stops
$1,227United Airlines
Tue, Aug 25 - Sat, Aug 29
United Airlines Logo
6:10 am - 3:38 pm
LST
-
STL
48h 28m
3 stops
United Airlines Logo
8:52 am - 4:05 pm
STL
-
LST
40h 13m
2 stops
$2,507United 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 $1,087 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $296 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 April and July, where the average cost of tickets from Australia is $1,640 and $1,608 respectively. For one-way flights, the best month to travel is June with an average price of $820.

Find deals

Good to know

Low seasonFebruary
Cheapest flight$639
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 3 days, the cheapest flight deal to St. Louis was found on the route from Sydney, at $1,087 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $296 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 2,970 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 9684 reviews
6.6Food
7.3Comfort
7.7Boarding
8.1Crew
7.1Entertainment
Airline reviews

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

6.0 GoodAnonymous, May 2026
DEN - ORD
Read more United Airlines reviews

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Seats were not super comfortable and food was not good at all. If I had a chance I would definitely fly a different airline. Of course they are better than any budget airline, but not by much.

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

Very friendly and helpful staff on board and United was excellent when I missed my onward flight due to the delay in London. Very well organised meant much less stress

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

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

St. Louis (STL)