SYD - STL

$1,428 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 2/5. 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 return fare
$1,428
Typical prices: $2,126-$1,548
Air Canada
Wed 20/5Thu 28/5
SYD - STL • 2 stops
Cheapest one-way flight
$1,145
Delta
Sat 2/5
SYD - STL • 2 stops
Top airlines
Cheapest • from $1,491 (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 $1,542 (return)
Shortest trip • 19h 43m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds 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 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, 20 May - Thu, 28 May
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,428Multiple Airlines
Wed, 20 May - Thu, 28 May
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,431Multiple Airlines
Wed, 20 May - Thu, 28 May
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,482Multiple Airlines
Wed, 20 May - Thu, 28 May
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,488Multiple Airlines
Wed, 10 Jun - Wed, 17 Jun
Air Canada Logo
09:20 - 23:57
SYD
-
STL
53h 37m
2 stops
Air Canada Logo
08:40 - 07:20
STL
-
SYD
31h 40m
2 stops
$1,491Air Canada
Wed, 10 Jun - Wed, 17 Jun
Air Canada Logo
09:20 - 23:57
SYD
-
STL
29h 37m
2 stops
Air Canada Logo
08:40 - 07:20
STL
-
SYD
55h 40m
2 stops
$1,495Air Canada
Mon, 10 Aug - Thu, 3 Sep
Air Canada Logo
09:20 - 20:39
SYD
-
STL
50h 19m
2 stops
Air Canada Logo
05:10 - 07:20
STL
-
SYD
35h 10m
2 stops
$1,507Air Canada
Mon, 10 Aug - Thu, 3 Sep
Air Canada Logo
09:20 - 20:39
SYD
-
STL
50h 19m
2 stops
Air Canada Logo
05:10 - 07:20
STL
-
SYD
35h 10m
2 stops
$1,516Air Canada
Mon, 10 Aug - Thu, 3 Sep
Air Canada Logo
09:20 - 16:31
SYD
-
STL
46h 11m
2 stops
Air Canada Logo
05:10 - 07:20
STL
-
SYD
35h 10m
2 stops
$1,517Air Canada
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,537Air Canada
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 May.

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 $1,321 (return) on average. On the other hand, the most expensive months are April and July, where the average cost of round-trip tickets is $2,285 and $2,240 respectively.

Good to know

Low seasonMarch
Cheapest flight$1,145
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (21% 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 3 days, the lowest price for a flight from Sydney to St. Louis was $1,428 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 $1,793 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 $1,690 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 1028 reviews
7.5Comfort
7.7Boarding
7.2Entertainment
8.1Crew
7.0Food
Airline reviews

Loved the food and beverages available, spacious economy class, excellent entertainment

10.0 ExcellentAnonymous, Apr 2026
MEL - LAX
Read more Qantas Airways reviews

Loved the food and beverages available, spacious economy class, excellent entertainment

Very good overall. Highly recommend for all flying to Australia

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.

On the Qantas flight, I could barely hear some of the announcements. It was better when I could read them on the screen.

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

Our boarding and flight was very good. However when we landed and pulled in to the gate it took 55 minutes for the jet bridge to be positioned next to the aircraft. That caused us to miss our ground transportation and it caused us unnecessary last minute transit planning and expense. Our flight was AA1733 on March 17, 2026

We booked with Qantas instead of Delta and we instead flew on American Airlines. American is not our favorite to go on. No leg room and the width of seats are a joke. Your are packed like sardines on American flights.

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.

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

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Flight crew was super friendly and helpful. Food was frequent and honestly pretty good. Plenty of on-board entertainment. Economy seats are super cramped for such a long flight, but the crew allowed people to get up and stretch, and kids could wander with their parents, so we all made it work. Overall a very good experience.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Outstanding service, great food, friendly & efficient crew, safe & comfortable flight

Staff were not attentive, wifi did not work, cut my head in the bathroom due to the position of the soap on the sink, had blood running down my face, told staff, they had no expression no sympathy, didn't even say "sorry", they said "oh we will have a look at that" about 10 mins later the purser brought me a bandaid, still no sorry.... Shocking

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

Poor... food was horrible, boarding very slow, service on board mediocre

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

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

Information on your arrival and departure airports