$572 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 12/12. 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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Everything you should know

Cheapest round-trip
$922
Overall average: $1,332
United Airlines
Sat 4/4Tue 4/14
MEL - STL • 1 stop
Cheapest one-way
$572
Delta
Fri 12/12
MEL - STL • 2 stops
When to travel
November
Cheapest • 24% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
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

Sat, Apr 4 - Tue, Apr 14
United Airlines Logo
11:55 am - 5:52 amMEL-STL
33h 57m1 stop
United Airlines Logo
7:06 pm - 8:15 amSTL-MEL
22h 09m1 stop
$922United Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
Air Canada Logo
11:20 am - 3:29 pmSYD-STL
45h 09m2 stops
Air Canada Logo
4:05 pm - 9:35 amSTL-SYD
48h 30m2 stops
$1,150Air Canada
Find Deal
Sat, Feb 14 - Wed, Feb 18
Air Canada Logo
11:20 am - 3:29 pmSYD-STL
45h 09m2 stops
Air Canada Logo
4:05 pm - 9:35 amSTL-SYD
48h 30m2 stops
$1,167Air Canada
Find Deal
Sat, Feb 14 - Wed, Feb 18
Air Canada Logo
11:20 am - 3:29 pmSYD-STL
45h 09m2 stops
Air Canada Logo
4:05 pm - 9:35 amSTL-SYD
48h 30m2 stops
$1,171Air Canada
Find Deal
Thu, Feb 5 - Mon, Feb 9
Air Canada Logo
8:00 am - 3:29 pmMEL-STL
48h 29m3 stops
Air Canada Logo
4:05 pm - 1:35 pmSTL-MEL
52h 30m3 stops
$1,196Air Canada
Find Deal
Thu, Feb 5 - Mon, Feb 9
Qantas Airways Logo
6:00 am - 4:14 pmMEL-STL
27h 14m2 stops
Qantas Airways Logo
11:55 am - 11:25 amSTL-MEL
30h 30m2 stops
$1,215Qantas Airways
Find Deal
Thu, Feb 5 - Mon, Feb 9
Qantas Airways Logo
6:00 am - 2:47 pmMEL-STL
25h 47m2 stops
Qantas Airways Logo
11:55 am - 1:35 pmSTL-MEL
32h 40m2 stops
$1,220Qantas Airways
Find Deal
Thu, Feb 5 - Mon, Feb 9
American Airlines Logo
12:00 pm - 8:51 amMEL-STL
37h 51m2 stops
American Airlines Logo
11:55 am - 5:00 amSTL-MEL
24h 05m1 stop
$1,496American Airlines
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Thu, Feb 5 - Mon, Feb 9
American Airlines Logo
12:00 pm - 8:51 amMEL-STL
37h 51m2 stops
American Airlines Logo
11:55 am - 5:00 amSTL-MEL
24h 05m1 stop
$1,501American Airlines
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Thu, Jan 8 - Thu, Jan 29
Multiple Airlines Logo
2:05 pm - 7:29 pmSYD-STL
22h 24m1 stop
Multiple Airlines Logo
11:55 am - 8:00 amSTL-SYD
27h 05m2 stops
$1,611Multiple Airlines
Find Deal
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 August, where tickets cost $931 on average for one-way flights. On the other hand, the most expensive months are July and January, where the average cost of tickets from Australia is $1,855 and $1,548 respectively. For return trips, the best month to travel is November with an average price of $1,031.

Good to know

Low seasonFebruary
Cheapest flight$572
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 14% 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.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Friday where tickets can be as cheap as $1,050. On the other hand, the most expensive day to fly is Saturday, where prices are $1,861 on average.

  • 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.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally in the morning, when flights cost $1,352 on average. The most expensive time of day to fly to St. Louis is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,824.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 2,197 direct flights from within Australia to St. Louis. The most common day for departures is Sunday, with 18% 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 airlines 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.
7.5
Qantas AirwaysOverall score based on 942 reviews
7.5Comfort
7.2Entertainment
7.0Food
7.7Boarding
8.2Crew
Airline reviews

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

2.0 MediocreMichelle, Nov 2025MEL - CBR
Read more Qantas Airways reviews

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

Basic airline, aircraft and service. AA gets you from point A to B. My flight was delayed by 2 hours too.

No internet on flight, which makes log travels really hard.

Not great. The inflight entertainment was all on an app, and I did not want to watch a film on my phone. Also, the range of options of films was limited.

My flight from Dallas to Sydney was cancelled. My entire trip was rerouted to include the following: Hartford to Washington DC Washington DC to JFK JFK to Auckland Auckland to Christchurch I paid for an aisle seat on the flight to Auckland and was asked if I would take a window seat to accommodate a family. The agent at the podium failed to mention that the family had a 3 month old baby and that a bassinet would be used during the 16 hour flight. The only way I could get out of my seat was to crawl under the bassinet of the sleeping baby. I think it is wrong that I was no given the choice to sit in another seat, that the agent knew what she was doing and chose to not properly disclose my seating arrangement. Terrible treatment.

they ran out of fruit for breakfast and so I just had a yogurt instead. other than that the flight was good

by the time they got to our row, they were out of some of the food options. games and movies were great but maybe more game options like tetris or pac man would be great

A few more inches of legroom is all i ask

Great as usual, some delays but well communicated and made up for in the air

We boarded late. The crew at the airport was dismissive. The seat cushion on the plane was uncomfortable.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

United has come a long way, it’s been a fantastic experience traveling with them.

Even though we were delayed, we were able to make our connection

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Great crew, excellent landing, good food. Over all great experience. Thank you!

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

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