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Cheap flights from St. Louis (STL) to Sydney (SYD) from $1,054

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 10/19. 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
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
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The best prices from Lambert-St Louis to Sydney Kingsford Smith are usually found in February or March, booked 60 days in advance, depart on a Sunday or Saturday and return on a Monday

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 May 16, 2024.

Popular in

December

Cheapest in

February

Round-trip from

$1,107

One-way from

$1,054
High demand for flights, 35% potential price rise
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Best time to find cheap flights, 22% potential price drop
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From Lambert-St Louis to Sydney Kingsford Smith
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One-way flight from Lambert-St Louis to Sydney Kingsford Smith
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What is the cheapest day to fly round-trip from St. Louis to Sydney?

It’s generally more expensive to depart on a Saturday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Find a great deal and save up to 109% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Sydney within the next two weeks, with the cheapest ticket starting at $989.

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

Flights from St. Louis to Sydney lean towards being more expensive in December. Prices are generally better when you fly from St. Louis to Sydney in February, with the cheapest ticket starting at $1,194.

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

It’s optimal to fly from St. Louis to Sydney in the morning. By choosing this option you can save up to 5% on the cost of your flight, compared to a flight in the evening.

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 2,637,452 searches. Data last updated May 16, 2024.
Peruse some of the lowest-priced Air Canada flights we've found from St. Louis to Sydney. It's recommended that users confirm their flight details before booking.
Sun 11/310:40 amSTL - SYD
2 stops29h 40mAir Canada
Wed 11/1311:20 amSYD - STL
2 stops39h 33mAir Canada
Deal found 5/15$1,153
Wed 8/144:05 pmSTL - SYD
2 stops48h 15mAir Canada
Sun 8/189:20 amSYD - STL
2 stops45h 01mAir Canada
Deal found 5/14$1,468
Fri 6/219:50 amSTL - SYD
2 stops30h 30mAir Canada
Sat 7/139:20 amSYD - STL
3 stops50h 45mAir Canada
Deal found 5/15$1,490
Fri 6/219:50 amSTL - SYD
3 stops54h 30mAir Canada
Sat 7/139:20 amSYD - STL
3 stops50h 45mAir Canada
Deal found 5/15$1,496
Sat 7/612:00 pmSTL - SYD
2 stops52h 20mAir Canada
Sat 7/279:20 amSYD - STL
2 stops45h 01mAir Canada
Deal found 5/15$1,580
Sat 7/612:00 pmSTL - SYD
3 stops52h 20mAir Canada
Sat 7/279:20 amSYD - STL
3 stops50h 45mAir Canada
Deal found 5/15$1,586
Fri 6/219:50 amSTL - SYD
3 stops30h 30mAir Canada
Sat 7/139:20 amSYD - STL
2 stops25h 41mAir Canada
Deal found 5/16$1,946
Sat 5/2511:00 amSTL - SYD
3 stops53h 20mAir Canada
Fri 5/319:20 amSYD - STL
2 stops26h 45mAir Canada
Deal found 5/15$2,014
Sat 5/2511:00 amSTL - SYD
3 stops53h 20mAir Canada
Fri 5/319:20 amSYD - STL
3 stops50h 45mAir Canada
Deal found 5/15$2,177

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 2,637,452 searches. Data last updated May 16, 2024.
Browse through some of the cheapest Qantas Airways flights traveling from St. Louis to Sydney. Check back soon if you're not seeing flights that suit your needs.
Sun 11/37:23 pmSTL - SYD
1 stop20h 37mQantas Airways
Wed 11/1311:15 amSYD - STL
1 stop28h 45mQantas Airways
Deal found 5/15$1,311
Sat 5/256:02 pmSTL - SYD
1 stop22h 03mQantas Airways
Fri 5/319:15 amSYD - STL
1 stop29h 02mQantas Airways
Deal found 5/15$1,399
Fri 6/216:29 amSTL - SYD
1 stop33h 36mQantas Airways
Sat 7/135:35 pmSYD - STL
1 stop20h 32mQantas Airways
Deal found 5/15$1,424
Fri 6/216:29 amSTL - SYD
1 stop34h 41mQantas Airways
Sat 7/135:35 pmSYD - STL
1 stop20h 32mQantas Airways
Deal found 5/16$1,425
Tue 10/225:30 pmSTL - SYD
1 stop22h 40mQantas Airways
Thu 10/3111:15 amSYD - STL
1 stop27h 45mQantas Airways
Deal found 5/16$1,432
Wed 8/147:00 amSTL - SYD
1 stop33h 05mQantas Airways
Sun 8/189:15 amSYD - STL
1 stop28h 27mQantas Airways
Deal found 5/15$1,447
Sat 7/66:29 amSTL - SYD
1 stop33h 36mQantas Airways
Sat 7/279:15 amSYD - STL
1 stop28h 52mQantas Airways
Deal found 5/15$1,636
Sat 5/256:02 pmSTL - SYD
2 stops26h 53mQantas Airways
Fri 5/319:15 amSYD - STL
1 stop29h 02mQantas Airways
Deal found 5/15$1,705
Fri 6/216:29 amSTL - SYD
1 stop33h 36mQantas Airways
Sat 7/136:00 amSYD - STL
2 stops32h 07mQantas Airways
Deal found 5/15$1,726

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 2,637,452 searches. Prices were last updated on May 16, 2024.
These are some of the best deals we've found on flights to Sydney in 2024 at this time. Check back soon for alternative fares.
Sat 5/256:02 pmSTL - SYD
1 stop22h 03mQantas Airways
Fri 5/319:15 amSYD - STL
1 stop29h 02mQantas Airways
Deal found 5/15$1,399
Fri 6/216:29 amSTL - SYD
1 stop33h 36mQantas Airways
Sat 7/135:35 pmSYD - STL
1 stop20h 32mQantas Airways
Deal found 5/15$1,424
Fri 6/216:29 amSTL - SYD
1 stop34h 41mQantas Airways
Sat 7/135:35 pmSYD - STL
1 stop20h 32mQantas Airways
Deal found 5/16$1,425
Fri 5/311:10 pmSTL - SYD
2 stops26h 50mUnited Airlines
Tue 6/410:20 amSYD - STL
2 stops21h 09mUnited Airlines
Deal found 5/15$1,426
Fri 6/214:55 pmSTL - SYD
2 stops23h 00mUnited Airlines
Sat 7/1310:20 amSYD - STL
2 stops26h 17mUnited Airlines
Deal found 5/16$1,489
Fri 6/219:50 amSTL - SYD
2 stops30h 30mAir Canada
Sat 7/139:20 amSYD - STL
3 stops50h 45mAir Canada
Deal found 5/15$1,490
Fri 6/219:50 amSTL - SYD
3 stops54h 30mAir Canada
Sat 7/139:20 amSYD - STL
3 stops50h 45mAir Canada
Deal found 5/15$1,496
Fri 6/213:27 pmSTL - SYD
2 stops24h 38mAmerican Airlines
Sat 7/139:15 amSYD - STL
1 stop28h 52mAmerican Airlines
Deal found 5/16$1,562
Sat 5/256:02 pmSTL - SYD
2 stops26h 53mQantas Airways
Fri 5/319:15 amSYD - STL
1 stop29h 02mQantas Airways
Deal found 5/15$1,705

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 2,637,452 searches. Data last updated May 16, 2024.
These are some of the best deals we've found on flights to Sydney in 2024 at this time. Check back soon for alternative fares.
Sun 11/310:40 amSTL - SYD
2 stops29h 40mAir Canada
Wed 11/1311:20 amSYD - STL
2 stops39h 33mAir Canada
Deal found 5/15$1,153
Sun 11/37:23 pmSTL - SYD
1 stop20h 37mQantas Airways
Wed 11/1311:15 amSYD - STL
1 stop28h 45mQantas Airways
Deal found 5/15$1,311
Sun 9/86:15 amSTL - SYD
2 stops37h 20mAir New Zealand
Mon 9/169:55 amSYD - STL
2 stops27h 18mAir New Zealand
Deal found 5/16$1,324
Sun 9/85:30 pmSTL - SYD
1 stop22h 35mAmerican Airlines
Mon 9/169:10 amSYD - STL
1 stop21h 30mAmerican Airlines
Deal found 5/16$1,384
Sun 9/82:38 pmSTL - SYD
2 stops25h 27mAmerican Airlines
Mon 9/169:10 amSYD - STL
1 stop21h 30mAmerican Airlines
Deal found 5/16$1,387
Wed 8/1412:38 pmSTL - SYD
2 stops27h 27mAmerican Airlines
Sun 8/189:15 amSYD - STL
2 stops24h 46mAmerican Airlines
Deal found 5/15$1,388
Sat 5/256:02 pmSTL - SYD
1 stop22h 03mQantas Airways
Fri 5/319:15 amSYD - STL
1 stop29h 02mQantas Airways
Deal found 5/15$1,399
Tue 10/225:01 pmSTL - SYD
2 stops25h 34mAir New Zealand
Thu 10/311:45 pmSYD - STL
2 stops24h 30mAir New Zealand
Deal found 5/16$1,418
Fri 6/216:29 amSTL - SYD
1 stop33h 36mQantas Airways
Sat 7/135:35 pmSYD - STL
1 stop20h 32mQantas Airways
Deal found 5/15$1,424

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 2,637,452 searches. Data last updated May 16, 2024.
Book one of these great deals on flights from St. Louis to Sydney. To prevent any unwanted surprises, users should verify their flight info before booking.
Sat 5/256:02 pmSTL - SYD
1 stop22h 03mQantas Airways
Fri 5/319:15 amSYD - STL
1 stop29h 02mQantas Airways
Deal found 5/15$1,399
Sat 5/256:02 pmSTL - SYD
2 stops26h 53mQantas Airways
Fri 5/319:15 amSYD - STL
1 stop29h 02mQantas Airways
Deal found 5/15$1,705
Sat 5/256:02 pmSTL - SYD
2 stops24h 53mQantas Airways
Fri 5/316:45 pmSYD - STL
2 stops43h 32mQantas Airways
Deal found 5/15$1,938
Sat 5/2511:00 amSTL - SYD
3 stops53h 20mAir Canada
Fri 5/319:20 amSYD - STL
2 stops26h 45mAir Canada
Deal found 5/15$2,014
Sat 5/2511:00 amSTL - SYD
3 stops53h 20mAir Canada
Fri 5/319:20 amSYD - STL
3 stops50h 45mAir Canada
Deal found 5/15$2,177

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 2,637,452 searches. Data last updated May 16, 2024.
Users traveling one-way from St. Louis to Sydney can select one of these great deals. Users needing a return flight from St. Louis to Sydney should utilize the search form above.
Sat 10/199:00 amSTL - SYD
2 stops54h 55mUnited Airlines
Deal found 5/16$1,054
Sat 10/1912:10 pmSTL - SYD
1 stop26h 05mMultiple Airlines
Deal found 5/16$1,092
Sat 10/191:39 pmSTL - SYD
3 stops27h 06mMultiple Airlines
Deal found 5/16$1,223

Find flights from St. Louis to Sydney within your budget

Customize 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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,153 - $1,523

Route

Depart

Return

Price

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 11/3

2 stops29h 40m

Sydney Kingsford Smith

Wed 11/13

2 stops39h 33m

$1,153

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 11/3

1 stop20h 37m

Sydney Kingsford Smith

Wed 11/13

1 stop28h 45m

$1,311

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/8

2 stops37h 20m

Sydney Kingsford Smith

Mon 9/16

2 stops27h 18m

$1,324

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/8

1 stop22h 35m

Sydney Kingsford Smith

Mon 9/16

1 stop21h 30m

$1,384

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Sun 9/8

2 stops25h 27m

Sydney Kingsford Smith

Mon 9/16

1 stop21h 30m

$1,387

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 10/22

2 stops25h 34m

Sydney Kingsford Smith

Thu 10/31

2 stops24h 30m

$1,418

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Fri 6/21

1 stop33h 36m

Sydney Kingsford Smith

Sat 7/13

1 stop20h 32m

$1,424

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Fri 5/31

2 stops26h 50m

Sydney Kingsford Smith

Tue 6/4

2 stops21h 09m

$1,426

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 10/22

3 stops27h 06m

Sydney Kingsford Smith

Thu 10/31

2 stops24h 30m

$1,523

Flights are sorted by cheapest first

Deals found on 5/15

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 round-trip flight from St. Louis to Sydney. Price data was last updated on May 10, 2024.
The best time to book flights from St. Louis to Sydney is 60 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

When is the cheapest time to fly from St. Louis to Sydney?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Sydney. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Sydney flight should consider departing on Monday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 $1,123 while a round-trip flight costs $1,372. Price data was last updated on May 12, 2024.

Currently, February is the cheapest month in which you can book a flight from St. Louis to Sydney (average of $1,107). Flying from St. Louis to Sydney in July is currently the most expensive (average of $1,409). 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

$1,296

February

$1,107

March

$1,132

April

$1,357

May

$1,368

June

$1,390

July

$1,409

August

$1,304

September

$1,274

October

$1,213

November

$1,276

December

$1,389

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

51.8 - 71.6 °F

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 May 16, 2024.
Get a feel of what it's like to fly with Air Canada, Qantas Airways and United Airlines from St. Louis to Sydney by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,472 reviews
Check prices

Comfort

8.2

Overall

8.3

Boarding

8.4

Crew

8.7

Entertainment

7.8

Food

7.9

Reviews

1 / 10

I travel frequently but it was my first JAL flight and it turned out to be a good experience.

Japan Airlines
8.3
Very good
1,472 reviews
Japan Airlines
8.3
Very good
1,472 reviews
Check prices

Comfort

8.2

Overall

8.3

Boarding

8.4

Crew

8.7

Entertainment

7.8

Food

7.9

Reviews

1 / 10

I travel frequently but it was my first JAL flight and it turned out to be a good experience.

Air New Zealand
8.3
Very good
626 reviews
Japan Airlines
8.3
Very good
1,472 reviews
Check prices

Comfort

8.2

Overall

8.3

Boarding

8.4

Crew

8.7

Entertainment

7.8

Food

7.9

Reviews

1 / 10

I travel frequently but it was my first JAL flight and it turned out to be a good experience.

Qantas Airways
7.6
Good
967 reviews
Japan Airlines
8.3
Very good
1,472 reviews
Check prices

Comfort

8.2

Overall

8.3

Boarding

8.4

Crew

8.7

Entertainment

7.8

Food

7.9

Reviews

1 / 10

I travel frequently but it was my first JAL flight and it turned out to be a good experience.

United Airlines
7.4
Good
10,924 reviews
Japan Airlines
8.3
Very good
1,472 reviews
Check prices

Comfort

8.2

Overall

8.3

Boarding

8.4

Crew

8.7

Entertainment

7.8

Food

7.9

Reviews

1 / 10

I travel frequently but it was my first JAL flight and it turned out to be a good experience.

American Airlines
7.3
Good
14,514 reviews
Japan Airlines
8.3
Very good
1,472 reviews
Check prices

Comfort

8.2

Overall

8.3

Boarding

8.4

Crew

8.7

Entertainment

7.8

Food

7.9

Reviews

1 / 10

I travel frequently but it was my first JAL flight and it turned out to be a good experience.

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 $1,200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Sydney for under $1,200. The cheapest flight booked recently is on Air Canada for just $1,153, but on average you can expect to pay $1,425.

  • Are there last-minute flights available from St. Louis to Sydney for under $1,400?

    There are currently 5+ open flights from St. Louis to Sydney within the next 7 days for less than $1,400.

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

    According to our current data, Air Canada ($1,153), Qantas Airways ($1,311), and Air New Zealand ($1,324) offers the cheapest pricing from St. Louis to Sydney. Air Canada is priced at 31% lower than the current average price of a flight leaving 3 months from now.

  • What are the most popular airlines that fly from St. Louis to Sydney?

    Consider American Airlines, Air Canada or Delta when booking your flight. These represent the most popular airlines when flying from St. Louis to Sydney.

  • What does STL to SYD mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Lambert-St Louis Airport to Sydney Kingsford Smith Airport flight would often be abbreviated as a STL to SYD flight.

  • 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 vacation 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 5/16.

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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Top 6 airlines flying from St. Louis to Sydney

Discover the top 6 airlines that operate flights from St. Louis to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$980Average$1,364FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$1,013Average$1,535FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest$1,177Average$1,325FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest$1,214Average$1,545FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,257Average$1,781FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air New ZealandCheapest$1,421Average$1,591FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
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Search flights from St. Louis to Sydney by cabin class

Find flights from St. Louis to Sydney, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Can Cheapflights find flights from St. Louis to Sydney with no change fees?

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

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