STL - SYD

$921 Find Cheap Flights from St. Louis to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Sydney departing on 7/2. 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 Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Sydney, 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 St. Louis to Sydney, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$1,012
Typical prices: $1,530-$1,209
Qantas Airways
Sat 10/24Sat 11/7
STL - SYD • 1 stop
Cheapest one-way
$921
Typical prices: $741-$1,053
American Airlines
Thu 7/2
STL - SYD • 2 stops
Top airlines
Cheapest • from $1,012 (round-trip)
Best reviews • 8.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Sydney. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $887 (round-trip)
Shortest trip • 20h 45m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 12% 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 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
Flight Deals
Booking Insights
Flight Deals

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

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

Sat, Oct 24 - Sat, Nov 7
Qantas Airways Logo
6:30 am - 9:00 am
STL
-
SYD
34h 30m
1 stop
Qantas Airways Logo
5:50 pm - 4:40 pm
SYD
-
STL
39h 50m
2 stops
$1,012Qantas Airways
Sun, Nov 1 - Tue, Nov 10
Qantas Airways Logo
6:13 pm - 8:50 pm
STL
-
SYD
33h 37m
2 stops
Qantas Airways Logo
11:15 am - 11:42 pm
SYD
-
STL
29h 27m
1 stop
$1,013Qantas Airways
Wed, Oct 21 - Mon, Oct 26
Qantas Airways Logo
6:30 am - 8:05 am
STL
-
SYD
33h 35m
1 stop
Qantas Airways Logo
5:50 pm - 2:45 pm
SYD
-
STL
36h 55m
2 stops
$1,163Qantas Airways
Mon, Jun 8 - Tue, Jun 23
United Airlines Logo
2:57 pm - 7:00 am
STL
-
SYD
25h 03m
2 stops
United Airlines Logo
9:30 am - 11:57 pm
SYD
-
STL
29h 27m
2 stops
$1,308United Airlines
Sun, Jun 14 - Sun, Jun 21
United Airlines Logo
4:48 pm - 7:00 am
STL
-
SYD
23h 12m
2 stops
United Airlines Logo
9:30 am - 9:21 pm
SYD
-
STL
26h 51m
2 stops
$1,309United Airlines
Sun, Jun 14 - Sun, Jun 21
Qantas Airways Logo
7:20 pm - 6:55 am
STL
-
SYD
20h 35m
1 stop
Qantas Airways Logo
9:10 am - 11:56 pm
SYD
-
STL
29h 46m
1 stop
$1,363Qantas Airways
Sun, Jun 14 - Sun, Jun 21
Qantas Airways Logo
7:20 pm - 6:55 am
STL
-
SYD
20h 35m
1 stop
Qantas Airways Logo
9:10 am - 11:56 pm
SYD
-
STL
29h 46m
1 stop
$1,364Qantas Airways
Tue, Oct 13 - Fri, Nov 13
Qantas Airways Logo
6:30 am - 10:55 am
STL
-
SYD
36h 25m
2 stops
Qantas Airways Logo
2:05 pm - 4:40 pm
SYD
-
STL
19h 35m
1 stop
$1,366Qantas Airways
Tue, Oct 13 - Fri, Nov 13
Qantas Airways Logo
6:30 am - 9:35 am
STL
-
SYD
35h 05m
2 stops
Qantas Airways Logo
2:05 pm - 12:37 pm
SYD
-
STL
39h 32m
1 stop
$1,367Qantas Airways
Mon, Jun 8 - Sun, Jun 21
Qantas Airways Logo
6:35 am - 7:05 am
STL
-
SYD
33h 30m
1 stop
Qantas Airways Logo
9:10 am - 11:56 pm
SYD
-
STL
29h 46m
1 stop
$1,375Qantas Airways
Booking Insights

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

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Sydney, 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 St. Louis to Sydney is March, where tickets cost $1,233 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,665 and $1,512 respectively.

Good to know

Low seasonMarch
Cheapest flight$921
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from St. Louis to Sydney

When to book flights from St. Louis to Sydney

Are your dates flexible? Find out the best times to travel from St. Louis to Sydney 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 St. Louis to Sydney

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

    In the last 3 days, the lowest price for a flight from St. Louis to Sydney was $921 for a one-way ticket and $1,012 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Sydney.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Sydney are Fiji Airways and Qantas Airways. With an average price for the route of $1,214 and an overall rating of 8.1, Fiji Airways is the most popular choice. Qantas Airways is also a great choice for the route, with an average price of $1,356 and an overall rating of 7.5.

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

    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 St. Louis to Sydney.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from 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 from St. Louis to Sydney?

    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 Sydney with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SYD 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 St. Louis to Sydney?

    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 Sydney from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from St. Louis to Sydney

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Sydney. 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 St. Louis to Sydney? 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.
8.1
Fiji AirwaysOverall score based on 240 reviews
8.2Boarding
7.5Food
8.1Comfort
7.5Entertainment
8.6Crew
Airline reviews

I thought Fiji and Fiji Airways was great. Looking forward to the next trip. Baggage claim at the end went to sh...t

8.0 ExcellentJoseph, Apr 2026
NAN - HNL
Read more Fiji Airways reviews

I thought Fiji and Fiji Airways was great. Looking forward to the next trip. Baggage claim at the end went to sh...t

Fiji Airways always goes above and beyond. If anything I'd say the food was less enjoyable than in the past. But that in no way lessened the experience with the cabin crew or the excellent attentiveness and service they provided throughout the entire trip!

Left on time , arrived on time. Staff was awesome!!!!! Great flight!!!!

Great food, wonderful staff made a long flight seem short

Everything was great . Arrived on time was smooth plane was clean. Crew/Staff was friendly and helpful.

Everything from the staff to the comfort of business class was excellent. This is one of my new favorite airlines.

Ticketing said dinner for the almost 14 hour flight and we were delayed an hour. However, onboard we were only served a sluce if pizza bread and a cookie. Not at all dinner and insufficient for a long international flight. Breakfast was good.

We have had an absolutely horrific experience so far getting home from Australia on a $18,000 + flight we booked with you. The flight did not deplane in Dallas because there was no available gate or staircase. We sat in the plane for 3 hours waiting to deplane. As a result we missed our connecting flight to New York. American Airlines put us up in a hotel several miles away. We waited 45 minutes for a shuttle and The shuttle driver was horribly rude and unhelpful. They offered us $70 vouchers for food but actually there was no food left when we arrived minus some chicken nuggets and corn dogs. It was awful. Horrible way to end a vacation. There has to be accountability here.

A bit cramped in economy and the people in front wouldn’t put their seats up during meal service, crew did not help with that and I felt they could have done more about it.

The airline is ok, but it needs to improve it schedules.

I never flew with alliance. Kayak is a joke and none of the flights or times were correct. Won’t ever use kayak again

I missed my flight due to unforeseen circumstances It was, however , an excellent price !

We had a medical emergency, needing to get to an emergency room upon landing at LAX. I let the back flight attendants know the situation. One, David, contacted the pilot, who made arrangements for EMT's to be there when we got off the plane. They went above and beyond for us. We didn't have to go through customs, as a customs person came to us and checked us right at the exit of the jet way. Another wonderful woman, a United employee at LAX, perhaps a customer service liaison, took care of our luggage situation, as we weren't going to make our connection to Bozeman. When we came back to LAX to see when we could get a flight to Bozeman, the personnel are very accommodating and booked us on the next flight out, and assigned good seats. It was a horrible flight, physically, from Sydney to LAX, , but the professionalism of all involved was excellent! We are very grateful fir the way they all stepped in and helped during a very unpleasant medical situation. Thank you!!

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

Very good overall. However, your choices of free movies was limited and there was no music Channel???

I couldn't hear all of the announcements. It was nice when they put them on the screen.

This was the worst flight I’ve been on. Getting on the plane where is was 30 degrees outside was hotter on board cabin must’ve been 33 degrees. This is a health hazard. They cannot be doing this to save on fuel. People could die from this!!. Fans and a/c was, off entertainment was off. Poor excuse given. Crew made the excuse that the system didn’t have enough power. They basically were operating on one engine to save on jet fuel till 3 hours later on cruising altitude and they then started the second engine. And finally the cabin was cooled. On a 7hour red eye flight this made it so uncomfortable and impossible to sleep.

My experience was great overall. Tanya was particularly friendly and helpful the entire trip. I was very pleased with her customer service skills. The plane was an older aircraft but the entire way was comfortable with barely any turbulence at all. Qantas should speed up its fleet renovation. Totally recommend using this airline.

Qantas is always subpar beyond comfy chairs for a domestic flight

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

Some crew were unfriendly or in some cases just straight up rude.

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.

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

Terrible, horrible, disappointing- without telling us they changed planes and moved and separated our seats to opposite sides - said they changed seats putting us together - got to airport to find no, they did not - we sat opposing sides of plane - food overly salty to inedible, never saw stewardess but once - it was terrible

not sure why you ask about food, I n3ver get food on flights except maybe cookies or pretzels. wifi was slow and in and out most of the flight not good.

The crew was very attentive through out the flight. Seats were comfortable, nice flight bag with pillow and blanket. Food was okay, since it was a overnight flight seemed to go by fast.

The flight attendant on my side of business class seemed like a novice and did not provide good service. Otherwise the flight was good and the entertainment system was very good. No free WiFi.

Cancelled BOYH legs of our flight home 30 min before initial boarding

Cancelled the flight half hour before boarding. Then cancelled the connecting flight too.

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

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

Information on your arrival and departure airports