$605 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 6/26. 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, Jul 8 - Mon, Jul 20
Delta Logo
9:15 am - 12:41 am
SYD
-
STL
30h 26m
2 stops
Delta Logo
2:30 pm - 6:50 am
STL
-
SYD
25h 20m
2 stops
$1,037Delta
Mon, Aug 10 - Fri, Sep 4
Air Canada Logo
9:20 am - 6:42 pm
SYD
-
STL
48h 22m
2 stops
Air Canada Logo
8:55 am - 7:20 am
STL
-
SYD
31h 25m
2 stops
$1,046Air Canada
Thu, Jun 11 - Sun, Jun 21
Air New Zealand Logo
10:20 am - 9:30 pm
SYD
-
STL
26h 10m
2 stops
Air New Zealand Logo
1:13 pm - 6:55 am
STL
-
SYD
26h 42m
2 stops
$1,047Air New Zealand
Mon, Aug 10 - Fri, Sep 4
Qantas Airways Logo
12:00 pm - 6:14 pm
SYD
-
STL
21h 14m
1 stop
Qantas Airways Logo
3:32 pm - 6:55 am
STL
-
SYD
24h 23m
1 stop
$1,058Qantas Airways
Mon, Aug 10 - Fri, Sep 4
Qantas Airways Logo
12:00 pm - 6:14 pm
SYD
-
STL
21h 14m
1 stop
Qantas Airways Logo
3:32 pm - 6:55 am
STL
-
SYD
24h 23m
1 stop
$1,061Qantas Airways
Mon, Aug 10 - Fri, Sep 4
Qantas Airways Logo
12:00 pm - 6:14 pm
SYD
-
STL
21h 14m
1 stop
Qantas Airways Logo
3:32 pm - 6:55 am
STL
-
SYD
24h 23m
1 stop
$1,069Qantas Airways
Mon, Aug 10 - Fri, Sep 4
United Airlines Logo
10:20 am - 6:17 pm
SYD
-
STL
22h 57m
1 stop
United Airlines Logo
9:30 am - 6:55 am
STL
-
SYD
30h 25m
2 stops
$1,079United Airlines
Mon, Sep 7 - Sun, Sep 27
American Airlines Logo
9:45 am - 8:26 pm
MEL
-
STL
25h 41m
2 stops
American Airlines Logo
6:43 pm - 5:00 am
STL
-
MEL
43h 17m
1 stop
$1,268American Airlines
Mon, Sep 7 - Sun, Sep 27
American Airlines Logo
1:35 pm - 6:14 pm
MEL
-
STL
19h 39m
1 stop
American Airlines Logo
6:43 pm - 5:00 am
STL
-
MEL
43h 17m
1 stop
$1,269American Airlines
Mon, Sep 7 - Sun, Sep 27
United Airlines Logo
10:55 am - 10:59 pm
MEL
-
STL
27h 04m
2 stops
United Airlines Logo
6:15 am - 8:15 am
STL
-
MEL
35h 00m
2 stops
$1,284United 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 7 days.

In the last 7 days, the cheapest flight deal to St. Louis was found on the route from Melbourne, at $1,037 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $313 in the last 7 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 $1,659 and $1,627 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$605
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 7 days, the cheapest flight deal to St. Louis was found on the route from Melbourne, at $1,037 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $313 in the last 7 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 3,096 direct flights from within Australia to St. Louis. The most common day for departures is Sunday, with 19% 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 9768 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

4.0 OkayDenis, May 2026
SAV - ORD
Read more United Airlines reviews

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

It was a short flight so I was expecting too much

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

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.

How can you rate a flight when it is canceled after you leave the gate & 3 hours into sitting there or in remote area of airport after mechanical problems

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

Broken tray table. Erratic service. Premium economy is more economy than premium- other airlines treat PE much better. No lounge access.

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

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