SYD - STL

$692 Find Cheap Flights from Sydney 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 from Sydney 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 in flight searches from Sydney 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 in flight searches from Sydney to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$1,040
Typical prices: $1,182-$1,198
Multiple Airlines
Mon 3/9Mon 3/16
SYD - STL • 2 stops
Cheapest one-way
$692
Delta
Thu 7/30
SYD - STL • 2 stops
Top airlines
American Airlines
Cheapest • from $1,042 (round-trip)
Qantas Airways
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
August
Cheapest • 15% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Sydney to St. Louis (SYD-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sydney 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 Sydney to St. Louis

Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
6:20 am - 3:28 pm
SYD
-
STL
25h 08m
2 stops
Multiple Airlines Logo
4:13 pm - 9:00 am
STL
-
SYD
24h 47m
2 stops
$1,040Multiple Airlines
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
6:20 am - 3:28 pm
SYD
-
STL
25h 08m
2 stops
Multiple Airlines Logo
11:46 am - 6:55 am
STL
-
SYD
27h 09m
1 stop
$1,041Multiple Airlines
Thu, Feb 19 - Mon, Feb 23
American Airlines Logo
11:20 am - 5:13 pm
SYD
-
STL
22h 53m
2 stops
American Airlines Logo
6:38 am - 9:00 am
STL
-
SYD
33h 22m
1 stop
$1,042American Airlines
Thu, Feb 19 - Mon, Feb 23
American Airlines Logo
11:20 am - 11:59 pm
SYD
-
STL
29h 39m
1 stop
American Airlines Logo
6:38 am - 9:00 am
STL
-
SYD
33h 22m
1 stop
$1,044American Airlines
Thu, Feb 19 - Mon, Feb 23
American Airlines Logo
11:20 am - 7:29 pm
SYD
-
STL
25h 09m
2 stops
American Airlines Logo
9:35 am - 9:00 am
STL
-
SYD
30h 25m
2 stops
$1,051American Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
11:50 am - 3:38 pm
SYD
-
STL
20h 48m
1 stop
United Airlines Logo
5:25 pm - 9:15 am
STL
-
SYD
22h 50m
1 stop
$1,060United Airlines
Mon, Mar 9 - Mon, Mar 16
United Airlines Logo
12:10 pm - 10:25 pm
SYD
-
STL
26h 15m
1 stop
United Airlines Logo
4:47 pm - 7:00 am
STL
-
SYD
22h 13m
1 stop
$1,063United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
12:10 pm - 4:44 pm
SYD
-
STL
21h 34m
1 stop
United Airlines Logo
4:28 pm - 7:00 am
STL
-
SYD
21h 32m
1 stop
$1,069United Airlines
Thu, Mar 19 - Thu, Mar 26
American Airlines Logo
11:20 am - 7:29 pm
SYD
-
STL
24h 09m
2 stops
American Airlines Logo
6:38 am - 9:00 am
STL
-
SYD
34h 22m
1 stop
$1,072American Airlines
Thu, May 14 - Thu, Jun 4
American Airlines Logo
9:10 am - 11:59 pm
SYD
-
STL
29h 49m
1 stop
American Airlines Logo
6:36 am - 7:05 am
STL
-
SYD
33h 29m
1 stop
$1,073American Airlines
Booking Insights

KAYAK's insights & trends for Sydney to St. Louis flights

Get data-powered insights and trends into flights from Sydney to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Sydney to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Sydney to St. Louis departing in March.

What is the cheapest month to fly from Sydney to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney 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 from Sydney to St. Louis is August, where tickets cost $1,128 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,741 and $1,608 respectively.

Find deals

Good to know

Low seasonDecember
Cheapest flight$692
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly with an average 21% increase in price.
Flight from Sydney to St. Louis

When to book flights from Sydney to St. Louis

Are your dates flexible? Find out the best times to travel from Sydney to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Sydney to St. Louis

  • What is the cheapest flight from Sydney to St. Louis?

    In the last 3 days, the lowest price for a flight from Sydney to St. Louis was $692 for a one-way ticket and $1,040 for a round-trip.

  • Do I need a passport to fly between Sydney and St. Louis?

    Yes

  • Which aircraft models fly most regularly from Sydney to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sydney to St. Louis?

    oneworld is the only airline alliance operating flights between Sydney and St. Louis.

  • How does KAYAK find such low prices on flights from Sydney 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 from Sydney to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sydney to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Sydney is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sydney 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 to Sydney with another airline. Booking your flights between Sydney and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sydney 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 from Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Sydney to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Sydney to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sydney 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 986 reviews
7.5Comfort
8.2Crew
7.0Food
7.2Entertainment
7.7Boarding
Airline reviews

Flight arrived late with no one to help over 30 people rebook. I slept at the airport.

2.0 MediocreKelsey, Feb 2026
MIA - LAX
Read more Qantas Airways reviews

Flight arrived late with no one to help over 30 people rebook. I slept at the airport.

Business seats not as comfortable or private as most competitors (e.g. Qantas was outstanding), and movie selection was much more limited than Qantas or United has been recently

Hard to move and get out of my seat when the passenger in front is in recline position.

It was a good flight and no complaints. It just wasn't anything that was better than any other flight.

The crew were wonderful - if only the customers were as well behaved as the attendants!! Ha ha! If you could just talk to God and ask for less turbulence next time.... Juuuuust kidding....

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.

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

Everything you need to know for your flight from Sydney to St. Louis

Information on your arrival and departure airports

Sydney (SYD)
St. Louis (STL)