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STL - SYD

$872 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 10/27. 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
0 bags
Sun 6/2
Sun 6/9

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis 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.
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
5:30 pm - 8:10 amSTL-SYD
23h 40m1 stop
10:10 am - 3:40 pmSYD-STL
21h 30m1 stop
$1,720Qantas Airways
Find Deal
Thu, Oct 3 - Thu, Oct 17
7:15 am - 8:00 amSTL-SYD
32h 45m1 stop
1:45 pm - 12:27 amSYD-STL
26h 42m2 stops
$1,726Air New Zealand
Find Deal
Fri, Oct 18 - Sat, Nov 2
5:30 pm - 8:10 amSTL-SYD
22h 40m1 stop
10:10 am - 3:40 pmSYD-STL
21h 30m1 stop
$1,765
Find Deal
Tue, Oct 8 - Sat, Oct 26
5:30 pm - 8:10 amSTL-SYD
22h 40m1 stop
6:35 pm - 11:49 pmSYD-STL
21h 14m2 stops
$1,770
Find Deal
Tue, Oct 8 - Sat, Oct 26
4:05 pm - 7:20 amSTL-SYD
48h 15m2 stops
9:20 am - 9:05 pmSYD-STL
26h 45m2 stops
$1,809Air Canada
Find Deal
Sun, Jun 9 - Mon, Jul 29
6:05 pm - 7:00 amSTL-SYD
21h 55m1 stop
11:20 am - 5:08 pmSYD-STL
21h 48m1 stop
$1,816United Airlines
Find Deal
Thu, Oct 3 - Thu, Oct 17
1:39 pm - 6:55 amSTL-SYD
26h 16m2 stops
11:20 am - 5:08 pmSYD-STL
21h 48m1 stop
$1,820United Airlines
Find Deal
Thu, Oct 3 - Thu, Oct 17
12:00 pm - 7:20 amSTL-SYD
52h 20m2 stops
10:20 am - 9:05 pmSYD-STL
50h 45m3 stops
$2,016Air Canada
Find Deal
Thu, Oct 3 - Thu, Oct 17
2:56 pm - 7:05 amSTL-SYD
25h 09m2 stops
9:15 am - 11:07 pmSYD-STL
28h 52m1 stop
$2,020American Airlines
Find Deal
Mon, Jun 24 - Wed, Jul 10
2:56 pm - 7:05 amSTL-SYD
25h 09m2 stops
9:15 am - 11:07 pmSYD-STL
28h 52m1 stop
$2,120American Airlines
Find Deal
Fri, Jun 21 - Sat, Jul 13

Flights from St. Louis to Sydney - Travel Insights & Trends

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.

What’s the cheapest day of the week to fly from St. Louis to Sydney?

The average price of all flights from St. Louis to Sydney clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Sydney on a Sunday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from St. Louis to Sydney. For your return ticket, we recommend flying on a Monday and avoiding Saturdays for the best deals.

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 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 November, where tickets cost $1,410 on average. On the other hand, the most expensive months are December and January, where the average cost of tickets is $2,814 and $1,994 respectively.

How far in advance should I book a flight from St. Louis to Sydney?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to Sydney, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 47 days before departure.

Which airlines provide the cheapest flights from St. Louis to Sydney?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from St. Louis to Sydney found on KAYAK was with Alaska Airlines for $872. Qantas Airways proposed a round-trip connection from $1,720 and Air New Zealand from $1,726.

Good to know

Low season

April

High season

October

Cheapest flight

$872
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 10% lower on average.
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 $872 for a one-way ticket and $1,720 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?

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

  • What is the most popular layover when flying to Sydney from St. Louis?

    Los Angeles is the most popular layover city among KAYAK users traveling from St. Louis to Sydney.

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Sydney are Air New Zealand and Qantas Airways. With an average price for the route of $1,602 and an overall rating of 8.2, Air New Zealand is the most popular choice. Qantas Airways is also a great choice for the route, with an average price of $1,774 and an overall rating of 7.6.

  • 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.

See more FAQs

Top 5 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.
8.2
Air New ZealandOverall score based on 640 reviews
8.1Comfort
7.7Food
8.8Crew
8.4Boarding
7.9Entertainment
Airline reviews

All was good, the only thing was it didn't run on time.

8.0 ExcellentDaniel, Apr 2024ZQN - SYD
Read more about Air New Zealand reviews

All was good, the only thing was it didn't run on time.

Great meal. Best seats ever! They need to teach other airlines how to do that.

Overall excellent but the Captain kept the seat belt sign on for far too long, especially at the beginning and end of the flight. It was 2 hours after take-off before the crew were able to start the service (on an 11 hour night flight, reducing our sleeping time) and the seat belt sign on went on during breakfast (90 mins before landing) and was not turned off again until we landed. This made for an uncomfortable journey of trying to limit fluid intake because it was unclear when the toilets would be available for use.

United flight from SFO to PDX was cancelled. I will ask for a refund. Had to book on Alaska

They announced food service but then never came around. We also couldn’t land so kept trying to get to runway and then had to come up and go around happened like 3 times and cause the child next to me to start throwing up

Good food and entertainment options. Great Staff that were all welcoming and caregiving.

The recline on the seat in front of me came back so that I was staring at the top of the man’s head in front of me the whole trip. He refused to bring his seat back up twice every time he was instructed to do so and only relented when he had a tray of good in front of him. And then right back in my lap!!! Horrible man!! I complained to the staff multiple times, but no one would address the issue. Otherwise, it would have been a perfect flight.

There was a snafu with confirming seats at check which left us in limbo for the second leg of our trip. I believe the ANZ app is not well integrated with the systems at the terminal resulting in this disconcerting error.

Flight was canceled due to technical issue shortly before the check-in counters opened. Passengers were rebooked on a flight three days later. Request to be accommodated on Air Tahiti Nui could not be processed. Customer service sorted out the refund after calling and being put on hold for almost an hour.

The pilot tried to make up for lost time due to delays that were out of her control. She communicated the issues openly and clearly and made every effort to do what she could to alleviate issues.

Initial flight was cancelled so moved to an alternative flight. As a result, stuck in a middle seat. Flight then place in holding pattern prior to landing resulting in a very late trip home.

There was nothing I didn’t like, prices a little lower would help

Flight delay was informed at the last minute. Food quality is not up to Qantas standard I was unable to book an online boarding pass on any of my 6 flights.

Rescheduled after ticket purchased and issued, not 2 or 3 times and not a fourth but by 5 times, by Qantas, that's right, 5 changes! Forcing an overnight stay in Chile and need for visa. Qantas can no longer provide basic services as a national or international service provider. Professionalism is extinct and the provider needs to be mentored and educated in perfecting who to operate as an airline. Qantas is the spirit of Australian dissatisfaction.

Amazing! Was put on the earlier flight and I requested for an aisle seat and was given it. Thanks Qantas!

The crew were amazing - A great job. They made me feel special and valued.

Boarding was terrible - the ground staff member Fredeya at lax was more military than customer service, have never encountered a customer service representative as rude as her. Apart from that all other staff were wonderful and the flight was good.

The flight met my expectations. It left and landed on time

My bag didn’t make it but otherwise it was a great experience.

I travelled first class from LAX to MEL and it was a series of disasters which I put down to lax staff who dont care and a suck it attitude to customers - its all lip service and no delivery. The flight was delayed due to aircraft refuellers putting on 300,000 litres of fuel on a 380Q1. I entered via the first class bridge loaded my bags in the overhead locker. the lady in the next isle in first class also had hers in there as she wasn't allocated a locker over her seat. The attendant asked would I like a champagne - I said yes please. he promptly delivered a empty glass and the glass left on the desk. Then he ignored me for 20 minutes. When i asked him is he out of champagne he gave me the usual rubbish I was distracted. There are four staff and 15 first class passengers - give me a break. the glass stayed there on takeoff and then was still there 9 hours into the flight. When I arrived to my seat I told him I had eaten and wouldn't be eating on the flight - it was 10.30pm. Yet he comes by later 4am ( I happen to be awake) and says are you eating with us? I asked for the bed to be made up - they put a 3 inch 7cm mattress on the chair but as usual the break in the chair - the mattress sinks into it - so I had to move it around so I didnt get my back sunk in the V - Im 187cm tall. The cabinet next to 1K is for staff bags and the toilet is next door. I tried to avoid this seat but couldn't change - in to the flight 8 hours and the cabin rest change over kicks in - this attendant is shining his torch in my eyes taking out and returning his bag. Then the toilet starts flushing and forget trying to get to sleep. Yet no-one else needed torch! 11 hours into the 15.5 hour flight I ask for breakfast - I order two poached eggs, bacon on multigrain toast, tomatos and mushrooms. I get no bacon or toast and have to order it and the eggs are cold. Then I order a coffee which is so badly spilled - and not by air turbulence she brings back a serviette and replaces the first one rather than providing a clean dry saucer! First class in Qantas is a joke as the staff just don't get the meaning of prompt service and attention to detail. I will fly business class rather than first on Qantas as its better value for money but I have been very impressed with United First Polaris and given I fly internationally every month this is going to be my choice.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Food was terrible Not many options Stewards dont care Delay

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

They gave my seat away although it was a connecting flight with them and the flight was a bit delayed.

Flight was cancelled had to move to another gate late again no internet paid for the month and never can use it waste of money

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

WiFi connected but only let you go to the AA website, not even text messaging worked.

Too bad that first class seats do not recline significantly causing discomfort

I think the seats on some of their planes are uncomfortable. You can be ok on a short flight of two hours but no more than that. The delays, and also the refreshments on the plane were not enough.

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

All was good, except our baggage was lost for most of a day. We are thankful that it was found quickly and delivered to our hotel. Rouge was fine outside of that problem.

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

Very good other than we have to wait for one crew and we’re delayed and the pilot and his co- pilot has to make a difference to be right on time arrival. Disappointed about no food service also.

I had written all my complaints on my trip from Grand Junction to Denver so I will repeat it here! I was absolutely appalled that I had to pay for a regular seat that I choose 24 hrs before boarding! Also I checked my large bag which I had to pay for as well, and by the time I boarded all the room in the bins were gone so also had to check that one. I noticed people pulling out oversized suitcases, bigger than the measurements stated for carry on, and also large pack packs stuffed full! So these people were taking up 2 or 3 spaces that the rest of us should have been able to use but couldn’t! NoTV on the flight! Thankfully I had downloaded the United Airlines app and was able to watch movies on my phone. Don’t remember the last time I flew in a plane with no movie screens!

I was appalled to have to pay for just a regular seat when I went to book 24 hrs before my flight! Because it was only an hour flight I didn’t choose a seat from Grand Junction to Denver, but I did for Toronto and had to pay just to choose a regular available seat! In my 60+ years of flying this was the first time I have heard of this. Also, allowing people to bring on “huge “ suitcases, not carry on size, but much bigger, and then a large pack pack stuffed. So they take up all the room in the overhead bins and if we are later boarding, there is no room so we have to check our small carry on. I have already paid for and checked in one bag! I certainly will not choose to fly with United again unless it is the “only” airline available!

Easy boarding, roomy seats, plenty of good food, very helpful snd friendly staff. Very smooth flight! Only thing that could have been better was to have cranberry juice. Women like this as it helps avoid UTI’s and not as sweet as other juices.

The crew was friendly, the seats are too small. Air travel is barely tolerable anymore.

Food was icecold or frozen including breakfast. Hopeless service. Rude crew.

The flight was very uncomfortable and there was no snacks served for the 13 hours international flight. In addition, the flight was delayed 3 hours

Due to a strike taking place with the airline, it negatively impacted my flight in multiple ways. My flight was delayed over 2 hours and the food served was mediocre at best.

Book cheap flights from St. Louis to Sydney

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Sydney found on KAYAK in the last 72 hours.
10/27Sun
2 stopsAlaska Airlines
32h 25mSTL-SYD
$872
10/27Sun
1 stopQantas Airways
21h 37mSTL-SYD
$1,010
10/9Wed
1 stopUnited Airlines
21h 55mSTL-SYD
$1,027
9/27Fri
1 stopQantas Airways
22h 35mSTL-SYD
$1,030
10/27Sun
3 stops
33h 55mSTL-SYD
$1,065
9/27Fri
2 stopsAmerican Airlines
25h 27mSTL-SYD
$1,090
9/27Fri
1 stopUnited Airlines
21h 55mSTL-SYD
$1,092
9/27Fri
3 stops
29h 36mSTL-SYD
$1,223
6/3Mon
1 stopAmerican Airlines
22h 03mSTL-SYD
$3,328
6/3Mon
2 stopsAir New Zealand
37h 20mSTL-SYD
$5,134

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Last minute flights from St. Louis to Sydney

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Sydney that are departing in the next 10 days.
5/6Mon
multi-stopAir New Zealand
35h 26mSTL-SYD
5/8Wed
multi-stopAir New Zealand
25h 55mSYD-STL
$2,163
5/6Mon
multi-stop
28h 08mSTL-SYD
5/8Wed
multi-stop
25h 55mSYD-STL
$2,623
5/6Mon
multi-stop
19h 55mSTL-SYD
5/8Wed
multi-stop
18h 38mSYD-STL
$2,715
5/6Mon
multi-stop
23h 08mSTL-SYD
5/8Wed
multi-stop
21h 21mSYD-STL
$2,720
5/6Mon
multi-stopAir Canada
29h 20mSTL-SYD
5/8Wed
multi-stopAir Canada
50h 45mSYD-STL
$11,066
5/6Mon
multi-stopQantas Airways
23h 08mSTL-SYD
5/8Wed
multi-stopQantas Airways
20h 42mSYD-STL
$26,515
5/6Mon
multi-stop
23h 08mSTL-SYD
5/8Wed
multi-stop
21h 21mSYD-STL
$26,834
5/6Mon
multi-stopEmirates
32h 55mSTL-SYD
5/8Wed
multi-stopEmirates
41h 35mSYD-STL
$30,095

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St. Louis - Sydney Flights

Departure:

St. Louis (STL)United States

Destination:

Sydney (SYD)Australia

Return flight deals:

Sydney - St. Louis

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