SYD - STL

$1,503 Find Cheap Flights from Sydney to St. Louis – Compare and Save

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sydney to St. Louis departing on 14/10. 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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Everything you should know

Cheapest return fare
$1,503
Typical prices: $1,633-$1,791
American Airlines
Wed 14/10Sun 8/11
SYD - STL • 1 stop
Top airlines
Cheapest • from $1,503 (return)
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Sydney and St. Louis. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg $2,076 (return)
Shortest trip • 19h 43m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 16% price drop
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 Sydney to St. Louis (SYD-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return 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 return flight deals from Sydney to St. Louis

Wed, 14 Oct - Sun, 8 Nov
American Airlines Logo
10:10 - 23:46
SYD
-
STL
29h 36m
1 stop
American Airlines Logo
12:58 - 06:55
STL
-
SYD
24h 57m
1 stop
$1,503American Airlines
Mon, 12 Oct - Thu, 5 Nov
American Airlines Logo
13:00 - 18:20
SYD
-
STL
21h 20m
1 stop
American Airlines Logo
06:02 - 09:00
STL
-
SYD
33h 58m
1 stop
$1,557American Airlines
Wed, 14 Oct - Sun, 8 Nov
United Airlines Logo
11:20 - 21:21
SYD
-
STL
26h 01m
2 stops
United Airlines Logo
19:05 - 09:20
STL
-
SYD
21h 15m
1 stop
$1,576United Airlines
Wed, 14 Oct - Sun, 8 Nov
American Airlines Logo
11:05 - 19:48
SYD
-
STL
24h 43m
2 stops
American Airlines Logo
06:02 - 09:00
STL
-
SYD
33h 58m
1 stop
$1,579American Airlines
Sun, 6 Sep - Sun, 13 Sep
Multiple Airlines Logo
13:15 - 15:28
SYD
-
STL
41h 13m
3 stops
Multiple Airlines Logo
10:20 - 22:25
STL
-
SYD
45h 05m
3 stops
$1,609Multiple Airlines
Tue, 25 Aug - Sat, 29 Aug
United Airlines Logo
10:20 - 21:17
SYD
-
STL
25h 57m
2 stops
United Airlines Logo
16:40 - 07:00
STL
-
SYD
23h 20m
2 stops
$1,625United Airlines
Mon, 12 Oct - Thu, 5 Nov
American Airlines Logo
11:05 - 18:20
SYD
-
STL
23h 15m
2 stops
American Airlines Logo
06:02 - 09:00
STL
-
SYD
33h 58m
1 stop
$1,632American Airlines
Wed, 14 Oct - Sun, 8 Nov
American Airlines Logo
10:10 - 16:43
SYD
-
STL
22h 33m
2 stops
American Airlines Logo
14:54 - 09:00
STL
-
SYD
25h 06m
2 stops
$1,635American Airlines
Sun, 6 Sep - Sun, 13 Sep
Qantas Airways Logo
09:10 - 22:59
SYD
-
STL
28h 49m
1 stop
Qantas Airways Logo
06:00 - 07:05
STL
-
SYD
34h 05m
1 stop
$1,636Qantas Airways
Sun, 6 Sep - Sun, 13 Sep
Multiple Airlines Logo
09:30 - 17:06
SYD
-
STL
22h 36m
2 stops
Multiple Airlines Logo
12:59 - 06:55
STL
-
SYD
26h 56m
2 stops
$1,648Multiple 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 return flight from Sydney to St. Louis?

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

Flight prices are below average for this route right now.

Flights to St. Louis from Sydney usually cost between $1,506 and $1,827 in October.
The lowest price found in the past 5 days was $1,503 on American Airlines (14 Oct–8 Nov).

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 September, where tickets cost $1,487 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is $2,329 and $2,169 respectively.

Good to know

Low season

June

Cheapest flight

$1,503
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly (22% more expensive on average)
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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 5 days, the lowest price for a flight from Sydney to St. Louis was $1,503 for a return ticket.

  • Which airports will I be using when flying from Sydney to St. Louis?

    On your way to St. Louis, you’ll fly out from Sydney Kingsford Smith. You’ll be landing at Lambert-St Louis.

  • 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?

    Star Alliance, and oneworld are the airline alliances operating flights between Sydney and St. Louis, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Sydney to St. Louis, Qantas Airways or United Airlines?

    The two airlines most popular with KAYAK users for flights from Sydney to St. Louis are Qantas Airways and United Airlines. With an average price for the route of $1,788 and an overall rating of 7.5, Qantas Airways is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,862 and an overall rating of 7.4.

  • 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 return ticket. You could then fly to St. Louis with an airline and back to Sydney with another airline.

  • 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 3 airlines 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 1067 reviews
7.0Food
7.4Comfort
7.7Boarding
8.1Crew
7.2Entertainment
Airline reviews

Great food and good entertainment options for the long flight.

10.0 ExcellentBill, May 2026
SYD - DFW
Read more Qantas Airways reviews

Great food and good entertainment options for the long flight.

We had bulkhead seats in a A380 in the upper deck in seats 31 D and E. Storage was very limited other than in overhead bin - which is not within reach when in seat. Yet paying same price as others in premium economy who have a lot more storage within arm’s reach. Seems very unfair.

Good check in and helpful staff. Delayed for 1 hour. Took about 45 Mins to get baggage’s at DFW . Food was average ( Hindu meal ) . Overall it was good experience

When I originally booked this flight, I was expecting to travel on Qantas. When the itinerary changed and the long-haul segment was operated by American Airlines, we were disappointed but remained open-minded. Unfortunately, the overall service experience fell far short of expectations. This was a long-haul international flight. Getting up periodically to use the restroom or stretch is inevitable, especially on flights of this duration. However, each time we stood up, we felt as though we were inconveniencing the crew. The tone and body language often suggested that we were in the way or disrupting something simply by moving about the cabin. As a result, I avoided getting up as often as I needed to and was physically very sore upon arrival. Meal service was similarly impersonal. The options were presented in single words “beef or veggie,” “pasta or beef” without any description of what was actually being served. There was little engagement or courtesy beyond that. Even simple expressions of gratitude were often not acknowledged. I am accustomed to no-frills travel and do not expect luxury. What was disappointing was not the absence of extras, but the absence of basic warmth and professionalism. On a long-haul international flight, small moments of courtesy and humanity make a significant difference. In this case, the experience felt transactional and dismissive rather than welcoming. I hope this feedback is taken constructively, as there is a meaningful difference between efficient service and indifferent service.

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

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

I tried to check in online but was unable to do so. I stood in line for nearly two hours to check in. American Airlines was understaffed. When I finally got to the kiosk to check in, I was still unable to check in. No AA staff was available to help. Finally one of the airport security agents who was helping passengers became of lack of AA Staff told me: “I think the reason you can’t check in is that you are starting your name with an upper case letter when you write it. Just write it with all lower case letters.” That did allow me to check in. HOW COULD ANYONE POSSIBLY KNOW THAT IF THEY USE AN INITIAL UPPER CASE LETTER TO SPELL THEIR OWN NAME, AA WOULD NOT ALLOW THEM TO CHECK IN?????? Then I had to wait in line over half an hour again to drop off my baggage. Although I arrived at the airport 3 hours early, by the time I got to the gate, they had already started boarding.

Friendly staff, surprisingly good premium economy seats allowing good sleep/ snooze opportunity and very good menu.

The service was excellent. The quarters were a little cramped in Economy, and we had to exist there for 18 hours.

Food was great. Customer Service not so much! Flight Delays.

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

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

It was good but only meal served is very less. Meantime good to add rice and chicken in one of meal

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

I found the staff to not be very attentive at all. When paying for Business Class you expect a certain type of service and that was not found. They were almost rude even

Great. Food going from Australia to the US was better than other way around, but still needs improvement in terms of quality and quantity!!!

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.

Due to a cancelled flight the day before this flight only had 44 people. Best flight ever on international route. Food getting better. Can United provide fruit ex apples and bananas for snacks? Crew fantastic.

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Improvements in communication and empathy are absolutely necessary for American Airlines staff (top down). It’s like they are numb to the needs of their customers.

I like the speed of boarding and deplaning and the fact that everything was on time. The crew (attendants) were probably quite new and did not begin the in cabin service until 30 min before landing even though there was little to no air turbulence for the last 1.5 hours of the flight. It made for a mad scramble at the end to get trash collected and carts stowed before touch down.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

I did like the employee's, they are very friendly and all smiled most of the time, Overall, from checking in bags to getting on plane, not enough employees to be able to get all on the plane, therefore I was not able to get on the plane, due to no one wea there for me to check in my bag, so I decided to go thru the security point and by the time they were done with my bags, I was told that my bag cannot be checked in, and then found out that the lady that does the check in was boarding the customers onto the plane, she said that she was going back and fourth, there for was not able to get on the plane, which changed all my flights by the time I got to Dallas, I was on standby 3 times, and wasn't sure about being able to get on the fourth plane, so ended up buying another plane ticket, so I could make my destination on time.

Not sure about entertainment as I didn't use any, so maybe there should be an NA option on this survey. Otherwise everything was just as it should be. Of course I wish planes were more comfortable and had seats that would tilt back further.

American Airlines “Randy” questioned why I needed preboarding and denied my request for same. Then Randy attempted to berate me when I boarded with my group. I was seated in an exit roll with a young man with a disability that exhibited difficulty controlling and settling himself. But Tandy questioned my disability. The flight was horrible. It was overpacked.

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

Information on your arrival and departure airports