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Cheap flights from St. Louis to Sydney from $1,554

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 9/10. 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
10 May — 17 May1
1 adult
Fri 10/5
Fri 17/5

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 5 May 2024.

Popular in

December

Cheapest in

November

Average price

$2,587

Round-trip from

$190
High demand for flights, 34% potential price rise
Best time to find cheap flights, 24% 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 48 days in advance, which can save you up to 81% on flights from St. Louis to Sydney compared to booking the week you need them. Waiting 48 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 $3,573. For sooner than that we have options available in the next 3 days from $3,573.

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

The best pricing can be found in the month of November. Prices to Sydney from St. Louis average $2,814. You can even find prices in November for less than $2,814, as users have found deals to Sydney from as low as $1,842. 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 51%.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Sydney as you normally would.

Cheap Air New Zealand flights from St. Louis to Sydney

Explore cheap flight options specifically provided by Air New Zealand 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 542,222 searches. Data last updated 5 May 2024.
Peruse some of the lowest-priced Air New Zealand flights we've found from St. Louis to Sydney. Make sure to check back often as deals are often changing.
Thu 8/806:20STL - SYD
2 stops35h 25mAir New Zealand
Thu 15/811:50SYD - STL
2 stops23h 41mAir New Zealand
Deal found 4/5$2,200
Tue 15/1018:05STL - SYD
1 stop21h 55mAir New Zealand
Sun 20/1009:55SYD - STL
2 stops28h 20mAir New Zealand
Deal found 3/5$2,771
Wed 14/811:10STL - SYD
2 stops30h 35mAir New Zealand
Sun 18/811:50SYD - STL
2 stops25h 24mAir New Zealand
Deal found 3/5$2,980
Wed 14/817:03STL - SYD
2 stops26h 32mAir New Zealand
Sun 18/808:45SYD - STL
2 stops28h 29mAir New Zealand
Deal found 4/5$2,982

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 542,222 searches. Data last updated 5 May 2024.
Some of the best deals we've found on Air Canada flights travelling from St. Louis to Sydney. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 15/1012:00STL - SYD
2 stops28h 20mAir Canada
Sun 20/1010:20SYD - STL
2 stops26h 45mAir Canada
Deal found 3/5$2,321
Tue 15/1012:00STL - SYD
2 stops52h 20mAir Canada
Sun 20/1010:20SYD - STL
3 stops50h 45mAir Canada
Deal found 3/5$2,330
Tue 15/1012:00STL - SYD
3 stops52h 20mAir Canada
Sun 20/1010:20SYD - STL
3 stops50h 45mAir Canada
Deal found 3/5$2,337
Mon 3/609:50STL - SYD
2 stops30h 30mAir Canada
Mon 10/609:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$2,708
Fri 21/616:05STL - SYD
2 stops48h 15mAir Canada
Sat 13/709:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$2,811
Fri 21/609:50STL - SYD
2 stops54h 30mAir Canada
Sat 13/709:20SYD - STL
3 stops50h 45mAir Canada
Deal found 4/5$2,932
Mon 3/611:00STL - SYD
3 stops53h 20mAir Canada
Mon 10/609:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$2,998
Wed 19/609:50STL - SYD
2 stops30h 30mAir Canada
Tue 25/609:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$3,457

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 542,222 searches. Prices were last updated on 5 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 3/609:50STL - SYD
2 stops30h 30mAir Canada
Mon 10/609:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$2,708
Fri 21/616:05STL - SYD
2 stops48h 15mAir Canada
Sat 13/709:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$2,811
Fri 21/609:50STL - SYD
2 stops54h 30mAir Canada
Sat 13/709:20SYD - STL
3 stops50h 45mAir Canada
Deal found 4/5$2,932
Mon 3/611:00STL - SYD
3 stops53h 20mAir Canada
Mon 10/609:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$2,998
Mon 3/613:10STL - SYD
2 stops26h 45mMultiple Airlines
Mon 10/609:15SYD - STL
1 stop28h 43mMultiple Airlines
Deal found 4/5$3,124
Wed 19/609:05STL - SYD
3 stops32h 40mMultiple Airlines
Tue 25/611:50SYD - STL
2 stops23h 35mMultiple Airlines
Deal found 4/5$3,219
Fri 21/616:45STL - SYD
3 stops25h 00mMultiple Airlines
Sat 13/708:45SYD - STL
3 stops27h 52mMultiple Airlines
Deal found 4/5$3,258
Fri 21/617:27STL - SYD
1 stop21h 48mQantas Airways
Sat 13/717:35SYD - STL
1 stop20h 32mQantas Airways
Deal found 4/5$3,302
Mon 3/618:02STL - SYD
1 stop22h 03mAmerican Airlines
Mon 10/609:15SYD - STL
1 stop28h 43mAmerican Airlines
Deal found 4/5$3,352

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 542,222 searches. Data last updated 5 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.
Thu 8/806:20STL - SYD
2 stops35h 25mAir New Zealand
Thu 15/811:50SYD - STL
2 stops23h 41mAir New Zealand
Deal found 4/5$2,200
Thu 8/809:08STL - SYD
3 stops32h 37mMultiple Airlines
Thu 15/808:45SYD - STL
2 stops26h 46mMultiple Airlines
Deal found 4/5$2,301
Thu 8/809:08STL - SYD
3 stops32h 37mMultiple Airlines
Thu 15/808:45SYD - STL
3 stops28h 26mMultiple Airlines
Deal found 4/5$2,317
Tue 15/1012:00STL - SYD
2 stops28h 20mAir Canada
Sun 20/1010:20SYD - STL
2 stops26h 45mAir Canada
Deal found 3/5$2,321
Tue 15/1012:00STL - SYD
2 stops52h 20mAir Canada
Sun 20/1010:20SYD - STL
3 stops50h 45mAir Canada
Deal found 3/5$2,330
Tue 15/1012:00STL - SYD
3 stops52h 20mAir Canada
Sun 20/1010:20SYD - STL
3 stops50h 45mAir Canada
Deal found 3/5$2,337
Thu 8/807:00STL - SYD
1 stop33h 05mQantas Airways
Thu 15/809:15SYD - STL
1 stop28h 27mQantas Airways
Deal found 4/5$2,603
Mon 3/609:50STL - SYD
2 stops30h 30mAir Canada
Mon 10/609:20SYD - STL
2 stops45h 01mAir Canada
Deal found 4/5$2,708
Thu 8/816:18STL - SYD
2 stops23h 47mAmerican Airlines
Thu 15/809:15SYD - STL
1 stop28h 27mAmerican Airlines
Deal found 4/5$2,755

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 542,222 searches. Data last updated 5 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.
Wed 9/1010:15STL - SYD
2 stops29h 45mUnited Airlines
Deal found 4/5$1,554
Fri 27/917:30STL - SYD
1 stop22h 35mQantas Airways
Deal found 4/5$1,558
Sat 19/1016:55STL - SYD
2 stops47h 00mUnited Airlines
Deal found 3/5$1,594
Fri 27/914:38STL - SYD
2 stops25h 27mAmerican Airlines
Deal found 4/5$1,650
Sat 19/1012:10STL - SYD
1 stop26h 05mMultiple Airlines
Deal found 3/5$1,652
Sat 19/1014:05STL - SYD
3 stops27h 35mMultiple Airlines
Deal found 3/5$1,655
Fri 27/912:00STL - SYD
3 stops52h 20mAir Canada
Deal found 4/5$1,711
Wed 9/1014:05STL - SYD
3 stops27h 10mMultiple Airlines
Deal found 4/5$2,013
Sat 3/806:15STL - SYD
3 stops57h 05mMultiple Airlines
Deal found 3/5$6,089

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 542,222 searches. Data last updated 5 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$2,200 - $2,771

Route

Depart

Return

Price

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Thu 8/8

2 stops35h 25m

Sydney Kingsford Smith

Thu 15/8

2 stops23h 41m

$2,200

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Thu 8/8

3 stops32h 37m

Sydney Kingsford Smith

Thu 15/8

2 stops26h 46m

$2,301

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Thu 8/8

3 stops32h 37m

Sydney Kingsford Smith

Thu 15/8

3 stops28h 26m

$2,317

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 15/10

2 stops28h 20m

Sydney Kingsford Smith

Sun 20/10

2 stops26h 45m

$2,321

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 15/10

2 stops52h 20m

Sydney Kingsford Smith

Sun 20/10

3 stops50h 45m

$2,330

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 15/10

3 stops52h 20m

Sydney Kingsford Smith

Sun 20/10

3 stops50h 45m

$2,337

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Thu 8/8

1 stop33h 05m

Sydney Kingsford Smith

Thu 15/8

1 stop28h 27m

$2,603

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Thu 8/8

2 stops23h 47m

Sydney Kingsford Smith

Thu 15/8

1 stop28h 27m

$2,755

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 15/10

1 stop21h 55m

Sydney Kingsford Smith

Sun 20/10

2 stops28h 20m

$2,771

Flights are sorted by cheapest first

Deals found on 4/5

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 28 January 2024.
To ensure you get the cheapest price possible for a flight from St. Louis to Sydney, you should look to book at least 47 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 $2,164 while a return flight costs $2,437. Price data was last updated on 28 April 2024.

Currently, August is the cheapest month in which you can book a flight from St. Louis to Sydney (average of $126). Flying from St. Louis to Sydney in December is currently the most expensive (average of $168). 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

$230

February

$204

March

$230

April

$210

May

$203

June

$212

July

$203

August

$191

September

$198

October

$203

November

$231

December

$254

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 5 May 2024.
To help decide which airline to fly from St. Louis to Sydney, see what other customers have to say about Air New Zealand, Air Canada and Qantas Airways. 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
640 reviews

Overall

8.3

Comfort

8.1

Food

7.7

Crew

8.8

Entertainment

7.9

Boarding

8.4

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
640 reviews
8.3
Very Good
640 reviews

Overall

8.3

Comfort

8.1

Food

7.7

Crew

8.8

Entertainment

7.9

Boarding

8.4

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.

7.7
Good
983 reviews
8.3
Very Good
640 reviews

Overall

8.3

Comfort

8.1

Food

7.7

Crew

8.8

Entertainment

7.9

Boarding

8.4

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
2,465 reviews
8.3
Very Good
640 reviews

Overall

8.3

Comfort

8.1

Food

7.7

Crew

8.8

Entertainment

7.9

Boarding

8.4

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.

7.5
Good
1,260 reviews
8.3
Very Good
640 reviews

Overall

8.3

Comfort

8.1

Food

7.7

Crew

8.8

Entertainment

7.9

Boarding

8.4

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
14,728 reviews
8.3
Very Good
640 reviews

Overall

8.3

Comfort

8.1

Food

7.7

Crew

8.8

Entertainment

7.9

Boarding

8.4

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 $2,200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Sydney for under $2,200. The cheapest flight booked recently is on Air New Zealand for just $2,200, but on average you can expect to pay $2,779.

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

    Our cheapest airline available from St. Louis to Sydney is Air New Zealand. Our recent data shows that you can find tickets from as low as $2,200 on this airline. Additional options worth looking into are Air Canada and Qantas Airways, starting at $2,321 and $2,603 round-trip. Air New Zealand is 21% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Sydney one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $1,554. However, be on the lookout for offers from Qantas Airways and American Airlines, as they are both options that can get you from St. Louis to Sydney for a low price.

  • 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 4/5.

See more FAQs

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Alternative routes for St. Louis to Sydney
See prices for flight routes from nearby airports that may be better suited for you.

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How does Cheapflights help users find flights from St. Louis to Sydney?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Sydney from St. Louis today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Sydney?

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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