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Cheap flights from St. Louis to Sydney from $1,578

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/10. 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.
STL — SYD
21 May — 28 May1
1 adult
Tue 21/5
Tue 28/5

Cheap flight deals from St. Louis to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 16 May 2024.

Popular in

December

Cheapest in

February

Average price

$2,321

Round-trip from

$187
High demand for flights, 35% potential price rise
Best time to find cheap flights, 22% potential price drop
Average for round-trip flights in May 2024
From Lambert-St Louis to Sydney Kingsford Smith

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 109% on flights from St. Louis to Sydney compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $1,480. For sooner than that we have options available in the next 3 days from $2,925.

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

The best pricing can be found in the month of February. Prices to Sydney from St. Louis average $2,522. You can even find prices in February for less than $2,522, as users have found deals to Sydney from as low as $1,787. The month of December appears to be one of the more expensive times to travel to Sydney from St. Louis. Flying in the targeted month can save you up to 54%.

When is the cheapest time to fly from St. Louis to Sydney (STL - SYD)?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Sydney in the morning. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight at midday.

Cheap Air Canada flights from St. Louis to Sydney

Explore cheap flight options specifically provided by Air Canada for the route between St. Louis and Sydney. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 536,630 searches. Data last updated 16 May 2024.
Peruse some of the lowest-priced Air Canada flights we've found from St. Louis to Sydney. Make sure to check back often as deals are often changing.
Sun 3/1110:40STL - SYD
2 stops29h 40mAir Canada
Wed 13/1111:20SYD - STL
2 stops39h 33mAir Canada
Deal found 15/5$1,726
Sat 6/712:00STL - SYD
2 stops52h 20mAir Canada
Sat 27/709:20SYD - STL
2 stops45h 01mAir Canada
Deal found 15/5$2,365
Sat 6/712:00STL - SYD
3 stops52h 20mAir Canada
Sat 27/709:20SYD - STL
3 stops50h 45mAir Canada
Deal found 15/5$2,374
Fri 21/609:50STL - SYD
3 stops30h 30mAir Canada
Sat 13/709:20SYD - STL
2 stops25h 41mAir Canada
Deal found 16/5$2,913
Sat 25/511:00STL - SYD
3 stops53h 20mAir Canada
Fri 31/509:20SYD - STL
2 stops26h 45mAir Canada
Deal found 15/5$3,014
Sat 25/511:00STL - SYD
3 stops53h 20mAir Canada
Fri 31/509:20SYD - STL
3 stops50h 45mAir Canada
Deal found 15/5$3,258

Cheap Qantas Airways flights from St. Louis to Sydney

Explore cheap flight options specifically provided by Qantas Airways for the route between St. Louis and Sydney. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 536,630 searches. Data last updated 16 May 2024.
Some of the best deals we've found on Qantas Airways flights travelling from St. Louis to Sydney. Ensure the flight price, dates, time, and airline match your criteria before you book.
Sun 3/1119:23STL - SYD
1 stop20h 37mQantas Airways
Wed 13/1111:15SYD - STL
1 stop28h 45mQantas Airways
Deal found 15/5$1,962
Sat 25/518:02STL - SYD
1 stop22h 03mQantas Airways
Fri 31/509:15SYD - STL
1 stop29h 02mQantas Airways
Deal found 15/5$2,094
Fri 21/606:29STL - SYD
1 stop34h 41mQantas Airways
Sat 13/717:35SYD - STL
1 stop20h 32mQantas Airways
Deal found 16/5$2,133
Tue 22/1017:30STL - SYD
1 stop22h 40mQantas Airways
Thu 31/1011:15SYD - STL
1 stop27h 45mQantas Airways
Deal found 16/5$2,143
Wed 14/807:00STL - SYD
1 stop33h 05mQantas Airways
Sun 18/809:15SYD - STL
1 stop28h 27mQantas Airways
Deal found 15/5$2,166
Sat 6/706:29STL - SYD
1 stop33h 36mQantas Airways
Sat 27/709:15SYD - STL
1 stop28h 52mQantas Airways
Deal found 15/5$2,449
Sat 25/518:02STL - SYD
2 stops26h 53mQantas Airways
Fri 31/509:15SYD - STL
1 stop29h 02mQantas Airways
Deal found 15/5$2,552
Sat 25/518:02STL - SYD
2 stops24h 53mQantas Airways
Fri 31/518:45SYD - STL
2 stops43h 32mQantas Airways
Deal found 15/5$2,901

Cheap St. Louis to Sydney flights in May & June 2024

Find cheap flight options from St. Louis to Sydney specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 536,630 searches. Prices were last updated on 16 May 2024.
These are some of the most attractive deals on flights from St. Louis to Sydney in 2024. Check back soon for alternative fares.
Mon 20/518:02STL - SYD
1 stop22h 03mQantas Airways
Wed 22/509:15SYD - STL
1 stop29h 02mQantas Airways
Deal found 16/5$1,964
Fri 21/606:29STL - SYD
1 stop34h 41mQantas Airways
Sat 13/717:35SYD - STL
1 stop20h 32mQantas Airways
Deal found 16/5$2,133
Thu 27/615:27STL - SYD
2 stops24h 38mAmerican Airlines
Tue 30/709:15SYD - STL
2 stops29h 14mAmerican Airlines
Deal found 16/5$2,149
Thu 27/615:27STL - SYD
2 stops24h 38mAmerican Airlines
Tue 30/709:15SYD - STL
1 stop28h 52mAmerican Airlines
Deal found 16/5$2,151
Thu 27/606:29STL - SYD
1 stop33h 36mAmerican Airlines
Tue 30/709:15SYD - STL
1 stop28h 52mAmerican Airlines
Deal found 16/5$2,164
Sat 15/616:45STL - SYD
2 stops47h 10mUnited Airlines
Sat 22/609:30SYD - STL
2 stops51h 45mUnited Airlines
Deal found 16/5$2,206
Fri 21/616:55STL - SYD
2 stops23h 00mUnited Airlines
Sat 13/710:20SYD - STL
2 stops26h 17mUnited Airlines
Deal found 16/5$2,229
Sat 15/619:47STL - SYD
2 stops44h 18mAmerican Airlines
Sat 22/609:15SYD - STL
1 stop28h 43mAmerican Airlines
Deal found 16/5$2,292
Fri 21/615:27STL - SYD
2 stops24h 38mAmerican Airlines
Sat 13/709:15SYD - STL
1 stop28h 52mAmerican Airlines
Deal found 16/5$2,338

St. Louis to Sydney 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Sydney in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 536,630 searches. Data last updated 16 May 2024.
These are some of the most attractive deals on flights from St. Louis to Sydney in 2024. Check back soon for alternative fares.
Sun 3/1110:40STL - SYD
2 stops29h 40mAir Canada
Wed 13/1111:20SYD - STL
2 stops39h 33mAir Canada
Deal found 15/5$1,726
Sun 3/1119:23STL - SYD
1 stop20h 37mQantas Airways
Wed 13/1111:15SYD - STL
1 stop28h 45mQantas Airways
Deal found 15/5$1,962
Mon 20/518:02STL - SYD
1 stop22h 03mQantas Airways
Wed 22/509:15SYD - STL
1 stop29h 02mQantas Airways
Deal found 16/5$1,964
Sun 8/906:15STL - SYD
2 stops37h 20mAir New Zealand
Mon 16/909:55SYD - STL
2 stops27h 18mAir New Zealand
Deal found 16/5$1,982
Sun 8/917:30STL - SYD
1 stop22h 35mAmerican Airlines
Mon 16/909:10SYD - STL
1 stop21h 30mAmerican Airlines
Deal found 16/5$2,072
Sun 8/914:38STL - SYD
2 stops25h 27mAmerican Airlines
Mon 16/909:10SYD - STL
1 stop21h 30mAmerican Airlines
Deal found 16/5$2,076
Wed 14/812:38STL - SYD
2 stops27h 27mAmerican Airlines
Sun 18/809:15SYD - STL
2 stops24h 46mAmerican Airlines
Deal found 15/5$2,078
Wed 14/812:38STL - SYD
2 stops27h 27mAmerican Airlines
Sun 18/809:15SYD - STL
2 stops23h 14mAmerican Airlines
Deal found 16/5$2,079
Tue 22/1017:01STL - SYD
2 stops25h 34mAir New Zealand
Thu 31/1013:45SYD - STL
2 stops24h 30mAir New Zealand
Deal found 16/5$2,122

St. Louis to Sydney flights leaving soon

Find last-minute flight options from St. Louis to Sydney for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 536,630 searches. Data last updated 16 May 2024.
Have a look at some of the flights available from St. Louis to Sydney departing last-minute. It's wise to confirm all flight details are correct before booking.
Sat 25/518:02STL - SYD
1 stop22h 03mQantas Airways
Fri 31/509:15SYD - STL
1 stop29h 02mQantas Airways
Deal found 15/5$2,094
Sat 25/518:02STL - SYD
2 stops26h 53mQantas Airways
Fri 31/509:15SYD - STL
1 stop29h 02mQantas Airways
Deal found 15/5$2,552
Sat 25/518:02STL - SYD
2 stops24h 53mQantas Airways
Fri 31/518:45SYD - STL
2 stops43h 32mQantas Airways
Deal found 15/5$2,901
Sat 25/511:00STL - SYD
3 stops53h 20mAir Canada
Fri 31/509:20SYD - STL
2 stops26h 45mAir Canada
Deal found 15/5$3,014
Sat 25/511:00STL - SYD
3 stops53h 20mAir Canada
Fri 31/509:20SYD - STL
3 stops50h 45mAir Canada
Deal found 15/5$3,258

One-way flights to Sydney from St. Louis

Search for one-way flight options from St. Louis to Sydney. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 536,630 searches. Data last updated 16 May 2024.
If you're seeking multiple options on one-way flights from St. Louis to Sydney, be sure to check out these deals, which are updated often. Users needing a return flight from St. Louis to Sydney should utilise the search form above.
Sat 19/1009:00STL - SYD
2 stops54h 55mUnited Airlines
Deal found 16/5$1,578
Sat 19/1012:10STL - SYD
1 stop26h 05mMultiple Airlines
Deal found 16/5$1,634
Sat 19/1013:39STL - SYD
3 stops27h 06mMultiple Airlines
Deal found 16/5$1,831

Find flights from St. Louis to Sydney within your budget

Customise your flight search to find flights from St. Louis to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 536,630 searches. Data last updated 16 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,726 - $2,280

Route

Depart

Return

Price

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 3/11

2 stops29h 40m

Sydney Kingsford Smith

Wed 13/11

2 stops39h 33m

$1,726

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 3/11

1 stop20h 37m

Sydney Kingsford Smith

Wed 13/11

1 stop28h 45m

$1,962

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 8/9

2 stops37h 20m

Sydney Kingsford Smith

Mon 16/9

2 stops27h 18m

$1,982

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 8/9

1 stop22h 35m

Sydney Kingsford Smith

Mon 16/9

1 stop21h 30m

$2,072

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 8/9

2 stops25h 27m

Sydney Kingsford Smith

Mon 16/9

1 stop21h 30m

$2,076

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 22/10

2 stops25h 34m

Sydney Kingsford Smith

Thu 31/10

2 stops24h 30m

$2,122

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Fri 21/6

1 stop34h 41m

Sydney Kingsford Smith

Sat 13/7

1 stop20h 32m

$2,133

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 22/10

1 stop21h 55m

Sydney Kingsford Smith

Thu 31/10

2 stops24h 31m

$2,154

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 22/10

3 stops27h 06m

Sydney Kingsford Smith

Thu 31/10

2 stops24h 30m

$2,280

Flights are sorted by cheapest first

Deals found on 15/5

When is the best time to book a flight from St. Louis to Sydney?

Use this chart to determine the optimal time to book a return flight from St. Louis to Sydney. Price data was last updated on 10 May 2024.
To ensure you get the cheapest price possible for a flight from St. Louis to Sydney, you should look to book at least 60 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Search Deals

Average price of flights to Sydney by month

Plan your trip from St. Louis to Sydney by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Sydney is currently $1,681 while a return flight costs $2,056. Price data was last updated on 12 May 2024.

Currently, August is the cheapest month in which you can book a flight from St. Louis to Sydney (average of $125). Flying from St. Louis to Sydney in December is currently the most expensive (average of $167). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$226

February

$201

March

$228

April

$205

May

$199

June

$210

July

$199

August

$187

September

$196

October

$201

November

$229

December

$250

Temperature and rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average temperature and rainfall totals by month.

SYD

Temperature

11 - 22 °C

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 16 May 2024.
To help decide which airline to fly from St. Louis to Sydney, see what other customers have to say about Air Canada, Qantas Airways and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.3
Very Good
626 reviews

Food

7.6

Boarding

8.4

Comfort

8.1

Entertainment

7.9

Crew

8.8

Overall

8.3

Reviews

1 / 10

The crew, food, and entertainment were amazing. The leg room/distance from the row in front of you seems smaller than other airlines which is very uncomfortable.

8.3
Very Good
626 reviews
8.3
Very Good
626 reviews

Food

7.6

Boarding

8.4

Comfort

8.1

Entertainment

7.9

Crew

8.8

Overall

8.3

Reviews

1 / 10

The crew, food, and entertainment were amazing. The leg room/distance from the row in front of you seems smaller than other airlines which is very uncomfortable.

7.6
Good
967 reviews
8.3
Very Good
626 reviews

Food

7.6

Boarding

8.4

Comfort

8.1

Entertainment

7.9

Crew

8.8

Overall

8.3

Reviews

1 / 10

The crew, food, and entertainment were amazing. The leg room/distance from the row in front of you seems smaller than other airlines which is very uncomfortable.

7.4
Good
10,924 reviews
8.3
Very Good
626 reviews

Food

7.6

Boarding

8.4

Comfort

8.1

Entertainment

7.9

Crew

8.8

Overall

8.3

Reviews

1 / 10

The crew, food, and entertainment were amazing. The leg room/distance from the row in front of you seems smaller than other airlines which is very uncomfortable.

7.3
Good
14,514 reviews
8.3
Very Good
626 reviews

Food

7.6

Boarding

8.4

Comfort

8.1

Entertainment

7.9

Crew

8.8

Overall

8.3

Reviews

1 / 10

The crew, food, and entertainment were amazing. The leg room/distance from the row in front of you seems smaller than other airlines which is very uncomfortable.

7.0
Good
6,947 reviews
8.3
Very Good
626 reviews

Food

7.6

Boarding

8.4

Comfort

8.1

Entertainment

7.9

Crew

8.8

Overall

8.3

Reviews

1 / 10

The crew, food, and entertainment were amazing. The leg room/distance from the row in front of you seems smaller than other airlines which is very uncomfortable.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • Can I find flights from St. Louis to Sydney for under $1,800 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Sydney for under $1,800. The cheapest flight booked recently is on Air Canada for just $1,726, but on average you can expect to pay $2,169.

  • Are there last-minute flights available from St. Louis to Sydney for under $2,100?

    There are currently 5+ open flights from St. Louis to Sydney within the next 7 days for less than $2,100.

  • What are the cheapest airlines flying from St. Louis to Sydney round-trip?

    Our cheapest airline available from St. Louis to Sydney is Air Canada. Our recent data shows that you can find tickets from as low as $1,726 on this airline. Additional options worth looking into are Qantas Airways and Air New Zealand, starting at $1,962 and $1,982 round-trip. Air Canada is 31% cheaper than the average price of flights available within the next 90 days to this destination.

  • What does STL to SYD mean?

    This is defined as Lambert-St Louis Airport (STL) and Sydney Kingsford Smith Airport (SYD). Codes like Sydney Kingsford Smith Airport are often used to just call airports uniquely.

  • Can I find deals for flights from St. Louis to Sydney that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Sydney flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Sydney with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Sydney flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Sydney that include hotel bookings?

    Yes. In addition to deals on St. Louis to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Sydney.

  • Can I find deals for business class flights from St. Louis to Sydney?

    Yes. Cheapflights offers flight deals from St. Louis to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Sydney that allow pets onboard?

    Many airlines flying from St. Louis to Sydney offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Sydney?

    Yes, you can often find last-minute deals on St. Louis to Sydney flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Sydney flight deals updated?

    The St. Louis to Sydney flight deals you see on this page were last updated on 16/5.

See more FAQs

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Alternative routes for St. Louis to Sydney
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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Sydney from St. Louis.

Can Cheapflights find flights from St. Louis to Sydney with no change fees?

Need flexible booking options for your flight to Sydney from St. Louis? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Sydney become cheaper?

Yes! Start tracking prices for St. Louis to Sydney flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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