$612 Find Cheap Flights from Australia to St. Louis - Compare and Save

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

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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

Sat, Aug 15 - Sat, Aug 22
Qantas Airways Logo
9:45 am - 10:59 pm
MEL
-
STL
28h 14m
1 stop
Qantas Airways Logo
6:00 am - 6:45 am
STL
-
MEL
33h 45m
1 stop
$1,037Qantas Airways
Wed, Oct 28 - Tue, Nov 10
Qantas Airways Logo
1:05 pm - 6:20 pm
SYD
-
STL
21h 15m
1 stop
Qantas Airways Logo
7:00 am - 9:00 am
STL
-
SYD
33h 00m
1 stop
$1,041Qantas Airways
Wed, Oct 28 - Tue, Nov 10
Qantas Airways Logo
1:05 pm - 6:20 pm
SYD
-
STL
21h 15m
1 stop
Qantas Airways Logo
7:00 am - 9:00 am
STL
-
SYD
33h 00m
1 stop
$1,043Qantas Airways
Sat, Aug 1 - Fri, Aug 7
American Airlines Logo
9:00 am - 6:32 pm
SYD
-
STL
24h 32m
2 stops
American Airlines Logo
6:00 am - 7:05 am
STL
-
SYD
34h 05m
1 stop
$1,060American Airlines
Sat, Aug 15 - Sat, Aug 22
American Airlines Logo
8:00 am - 4:14 pm
MEL
-
STL
23h 14m
2 stops
American Airlines Logo
1:25 pm - 6:45 am
STL
-
MEL
26h 20m
2 stops
$1,068American Airlines
Thu, Aug 6 - Mon, Aug 10
Qantas Airways Logo
9:10 am - 10:59 pm
SYD
-
STL
28h 49m
1 stop
Qantas Airways Logo
6:00 am - 7:30 am
STL
-
SYD
34h 30m
1 stop
$1,074Qantas Airways
Sat, Aug 15 - Sat, Aug 22
Multiple Airlines Logo
8:50 pm - 8:24 pm
MEL
-
STL
38h 34m
3 stops
Multiple Airlines Logo
2:40 pm - 11:20 am
STL
-
MEL
29h 40m
3 stops
$1,105Multiple Airlines
Sat, Aug 15 - Sat, Aug 22
Multiple Airlines Logo
2:25 pm - 10:59 pm
MEL
-
STL
23h 34m
2 stops
Multiple Airlines Logo
6:00 am - 6:45 am
STL
-
MEL
33h 45m
1 stop
$1,107Multiple Airlines
Wed, Oct 21 - Sun, Oct 25
United Airlines Logo
6:10 am - 12:40 pm
LST
-
STL
46h 30m
3 stops
United Airlines Logo
8:28 am - 3:25 pm
STL
-
LST
38h 57m
2 stops
$1,459United Airlines
Wed, Oct 21 - Sun, Oct 25
United Airlines Logo
6:10 am - 12:40 pm
LST
-
STL
46h 30m
3 stops
United Airlines Logo
8:28 am - 3:25 pm
STL
-
LST
38h 57m
2 stops
$1,462United 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 5 days.

In the last 5 days, the cheapest flight deal to St. Louis was found on the route from Sydney, at $1,037 return. The most popular connection is from Melbourne to St. Louis and KAYAK users have found round-trip deals for as low as $1,037 in the last 5 days.

Good to know

Low seasonMarch
Cheapest flight$612
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 5% 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 5 days, the cheapest flight deal to St. Louis was found on the route from Sydney, at $1,037 return. The most popular connection is from Melbourne to St. Louis and KAYAK users have found round-trip deals for as low as $1,037 in the last 5 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 3,352 direct flights from within Australia to St. Louis. The most common day for departures is Friday, 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 9938 reviews
7.1Entertainment
7.7Boarding
7.3Comfort
6.6Food
8.1Crew
Airline reviews

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

6.0 GoodBridgette, Jun 2026
EWR - MCI
Read more United Airlines reviews

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Uncomfortable plastic seats even in premium economy. No free wifi. Even paid wifi was spotty to nonexistent. Bad food. Much worse than economy on foreign carriers like Qantas.

Airport terminal was outdated, flight was on a small jet with no wifi

Good flight. However, when booked flight with United, assumed the layover included by United in San Francisco of 1 hr and 40 minutes was sufficient . Not so and would recommend at least 2 hours or more. Needed to go through US immigration (very long lineups), then pick up bags, take all the way to another terminal, running because we did not have sufficient time. We made the flight because they held the door for us but luggage didn’t follow.

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

We boarded and buckled and then deplaned due to no pilot. Had to wait over 3 hours for a new pilot. Not weather related, just poor management.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

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