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Cheap flights from St. Louis (STL) to Sydney (SYD) from $748

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 6/24. 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 13 — May 201
From?
To?
Mon 5/13
Mon 5/20
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 8, 2024.

Popular in

December

Cheapest in

February

Round-trip from

$1,110

One-way from

$1,076
High demand for flights, 38% potential price rise
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Best time to find cheap flights, 23% 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 8% on the cost of your flight, compared to a flight in the evening.

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 2,752,338 searches. Data last updated May 8, 2024.
Peruse some of the lowest-priced Air New Zealand flights we've found from St. Louis to Sydney. It's recommended that users confirm their flight details before booking.
Tue 8/135:03 pmSTL - SYD
2 stops26h 32mAir New Zealand
Fri 8/2311:50 amSYD - STL
2 stops44h 13mAir New Zealand
Deal found 5/7$1,413
Tue 8/138:58 amSTL - SYD
2 stops32h 47mAir New Zealand
Fri 8/2310:20 amSYD - STL
1 stop29h 07mAir New Zealand
Deal found 5/7$1,512
Mon 11/44:17 pmSTL - SYD
2 stops25h 08mAir New Zealand
Tue 11/265:55 pmSYD - STL
2 stops44h 44mAir New Zealand
Deal found 5/7$1,513
Mon 11/44:17 pmSTL - SYD
2 stops23h 28mAir New Zealand
Tue 11/2612:10 pmSYD - STL
1 stop21h 53mAir New Zealand
Deal found 5/7$1,545
Sat 7/2711:10 amSTL - SYD
2 stops30h 35mAir New Zealand
Wed 7/318:45 amSYD - STL
2 stops28h 32mAir New Zealand
Deal found 5/6$1,892
Mon 6/244:55 pmSTL - SYD
2 stops24h 50mAir New Zealand
Wed 7/108:45 amSYD - STL
2 stops26h 46mAir New Zealand
Deal found 5/8$1,955
Wed 8/1411:10 amSTL - SYD
2 stops32h 25mAir New Zealand
Sun 8/188:45 amSYD - STL
2 stops28h 32mAir New Zealand
Deal found 5/6$1,971
Fri 6/214:55 pmSTL - SYD
2 stops26h 40mAir New Zealand
Sat 7/138:45 amSYD - STL
2 stops28h 32mAir New Zealand
Deal found 5/7$1,979
Wed 6/54:55 pmSTL - SYD
2 stops23h 00mAir New Zealand
Wed 6/126:10 pmSYD - STL
2 stops43h 05mAir New Zealand
Deal found 5/6$2,092

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 2,752,338 searches. Data last updated May 8, 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.
Tue 8/137:00 amSTL - SYD
1 stop33h 05mQantas Airways
Fri 8/239:15 amSYD - STL
1 stop28h 27mQantas Airways
Deal found 5/7$1,606
Mon 11/47:23 pmSTL - SYD
1 stop20h 37mQantas Airways
Tue 11/2611:15 amSYD - STL
1 stop28h 45mQantas Airways
Deal found 5/7$1,625
Wed 6/56:29 amSTL - SYD
1 stop33h 36mQantas Airways
Wed 6/129:15 amSYD - STL
1 stop28h 43mQantas Airways
Deal found 5/6$2,093
Wed 6/56:29 amSTL - SYD
2 stops35h 26mQantas Airways
Wed 6/125:35 pmSYD - STL
1 stop20h 23mQantas Airways
Deal found 5/6$2,116
Fri 6/215:27 pmSTL - SYD
1 stop21h 48mQantas Airways
Sat 7/139:15 amSYD - STL
1 stop28h 52mQantas Airways
Deal found 5/7$2,184
Wed 7/36:29 amSTL - SYD
1 stop33h 36mQantas Airways
Wed 7/109:15 amSYD - STL
1 stop28h 52mQantas Airways
Deal found 5/6$2,233
Sat 7/276:29 amSTL - SYD
2 stops36h 26mQantas Airways
Wed 7/319:15 amSYD - STL
1 stop28h 52mQantas Airways
Deal found 5/6$2,553
Sat 7/276:29 amSTL - SYD
1 stop33h 36mQantas Airways
Wed 7/313:50 pmSYD - STL
1 stop18h 30mQantas Airways
Deal found 5/6$2,584
Sat 5/256:02 pmSTL - SYD
1 stop22h 03mQantas Airways
Fri 5/3110:20 amSYD - STL
1 stop27h 57mQantas Airways
Deal found 5/7$2,647

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 2,752,338 searches. Prices were last updated on May 8, 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.
Fri 6/2111:00 amSTL - SYD
2 stops29h 20mAir Canada
Sat 7/139:20 amSYD - STL
2 stops25h 41mAir Canada
Deal found 5/8$1,953
Mon 6/244:55 pmSTL - SYD
2 stops24h 50mAir New Zealand
Wed 7/108:45 amSYD - STL
2 stops26h 46mAir New Zealand
Deal found 5/8$1,955
Fri 6/214:55 pmSTL - SYD
2 stops26h 40mAir New Zealand
Sat 7/138:45 amSYD - STL
2 stops28h 32mAir New Zealand
Deal found 5/7$1,979
Sat 5/2511:00 amSTL - SYD
2 stops53h 20mAir Canada
Fri 5/319:20 amSYD - STL
2 stops45h 01mAir Canada
Deal found 5/7$2,014
Sat 5/2511:00 amSTL - SYD
3 stops53h 20mAir Canada
Fri 5/319:20 amSYD - STL
2 stops45h 01mAir Canada
Deal found 5/7$2,020
Mon 6/244:45 pmSTL - SYD
3 stops25h 00mMultiple Airlines
Wed 7/108:45 amSYD - STL
2 stops26h 46mMultiple Airlines
Deal found 5/8$2,049
Fri 6/214:55 pmSTL - SYD
2 stops24h 50mMultiple Airlines
Sat 7/138:45 amSYD - STL
3 stops28h 35mMultiple Airlines
Deal found 5/7$2,074
Fri 6/214:55 pmSTL - SYD
2 stops24h 50mMultiple Airlines
Sat 7/138:45 amSYD - STL
3 stops28h 35mMultiple Airlines
Deal found 5/8$2,076
Wed 6/54:55 pmSTL - SYD
2 stops23h 00mAir New Zealand
Wed 6/126:10 pmSYD - STL
2 stops43h 05mAir New Zealand
Deal found 5/6$2,092

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 2,752,338 searches. Data last updated May 8, 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.
Tue 8/135:03 pmSTL - SYD
2 stops26h 32mAir New Zealand
Fri 8/2311:50 amSYD - STL
2 stops44h 13mAir New Zealand
Deal found 5/7$1,413
Mon 12/24:17 pmSTL - SYD
2 stops23h 28mAir New Zealand
Tue 12/247:15 pmSYD - STL
2 stops42h 06mAir New Zealand
Deal found 5/7$1,509
Tue 8/138:58 amSTL - SYD
2 stops32h 47mAir New Zealand
Fri 8/2310:20 amSYD - STL
1 stop29h 07mAir New Zealand
Deal found 5/7$1,512
Mon 11/44:17 pmSTL - SYD
2 stops25h 08mAir New Zealand
Tue 11/265:55 pmSYD - STL
2 stops44h 44mAir New Zealand
Deal found 5/7$1,513
Mon 12/26:15 amSTL - SYD
2 stops33h 30mAir New Zealand
Tue 12/2412:10 pmSYD - STL
1 stop21h 53mAir New Zealand
Deal found 5/7$1,538
Mon 11/44:17 pmSTL - SYD
2 stops23h 28mAir New Zealand
Tue 11/2612:10 pmSYD - STL
1 stop21h 53mAir New Zealand
Deal found 5/7$1,545
Mon 12/24:17 pmSTL - SYD
2 stops23h 28mMultiple Airlines
Tue 12/249:55 amSYD - STL
3 stops28h 44mMultiple Airlines
Deal found 5/7$1,572
Tue 8/137:00 amSTL - SYD
1 stop33h 05mQantas Airways
Fri 8/239:15 amSYD - STL
1 stop28h 27mQantas Airways
Deal found 5/7$1,606
Mon 11/47:23 pmSTL - SYD
1 stop20h 37mQantas Airways
Tue 11/2611:15 amSYD - STL
1 stop28h 45mQantas Airways
Deal found 5/7$1,625

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 2,752,338 searches. Data last updated May 8, 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.
Mon 6/247:00 amSTL - SYD
3 stops40h 40mMultiple Airlines
Deal found 5/8$748
Mon 6/242:21 pmSTL - SYD
2 stops33h 19mMultiple Airlines
Deal found 5/8$759
Fri 9/133:02 pmSTL - SYD
3 stops29h 43mMultiple Airlines
Deal found 5/7$1,050
Fri 9/134:51 pmSTL - SYD
2 stops23h 09mUnited Airlines
Deal found 5/7$1,076
Mon 7/18:58 amSTL - SYD
2 stops34h 37mAir New Zealand
Deal found 5/7$1,277
Mon 7/12:41 pmSTL - SYD
3 stops27h 04mMultiple Airlines
Deal found 5/7$1,283
Mon 6/246:29 amSTL - SYD
1 stop33h 36mQantas Airways
Deal found 5/8$1,317
Mon 7/19:44 amSTL - SYD
1 stop29h 31mMultiple Airlines
Deal found 5/7$1,450
Fri 9/135:30 pmSTL - SYD
2 stops45h 40mJapan Airlines
Deal found 5/6$11,257

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 2,752,338 searches. Data last updated May 8, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,413 - $3,447

Route

Depart

Return

Price

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 8/13

2 stops26h 32m

Sydney Kingsford Smith

Fri 8/23

2 stops44h 13m

$1,413

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 8/13

2 stops32h 47m

Sydney Kingsford Smith

Fri 8/23

1 stop29h 07m

$1,512

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Mon 11/4

2 stops25h 08m

Sydney Kingsford Smith

Tue 11/26

2 stops44h 44m

$1,513

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 8/13

1 stop33h 05m

Sydney Kingsford Smith

Fri 8/23

1 stop28h 27m

$1,606

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Mon 11/4

1 stop20h 37m

Sydney Kingsford Smith

Tue 11/26

1 stop28h 45m

$1,625

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Tue 8/13

3 stops52h 20m

Sydney Kingsford Smith

Fri 8/23

2 stops45h 01m

$1,644

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Mon 11/4

2 stops25h 08m

Sydney Kingsford Smith

Tue 11/26

3 stops24h 14m

$1,774

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Wed 7/3

2 stops24h 38m

Sydney Kingsford Smith

Wed 7/10

2 stops25h 15m

$2,368

Lambert-St LouisSydney Kingsford Smith

STL - SYD

STLSYD

Lambert-St Louis

Wed 6/5

3 stops56h 25m

Sydney Kingsford Smith

Wed 6/12

3 stops36h 35m

$3,447

Flights are sorted by cheapest first

Deals found on 5/7

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 3, 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.
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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 5, 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 $2,246 while a round-trip flight costs $1,878. Price data was last updated on May 5, 2024.

Currently, February is the cheapest month in which you can book a flight from St. Louis to Sydney (average of $1,110). Flying from St. Louis to Sydney in July is currently the most expensive (average of $1,427). 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

$1,298

February

$1,110

March

$1,132

April

$1,359

May

$1,369

June

$1,386

July

$1,427

August

$1,305

September

$1,276

October

$1,214

November

$1,279

December

$1,397

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 8, 2024.
Get a feel of what it's like to fly with Air New Zealand, Qantas Airways and Air Canada 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.
ANA
8.5
Very good
928 reviews
Check prices

Boarding

8.6

Food

7.8

Crew

8.8

Comfort

8.3

Entertainment

8.0

Overall

8.5

Reviews

1 / 10

They’re so kind and professional on ANA, I ordered a special meal and they were lovely throughout. Always kind and efficient, felt cared for in the sky

ANA
8.5
Very good
928 reviews
ANA
8.5
Very good
928 reviews
Check prices

Boarding

8.6

Food

7.8

Crew

8.8

Comfort

8.3

Entertainment

8.0

Overall

8.5

Reviews

1 / 10

They’re so kind and professional on ANA, I ordered a special meal and they were lovely throughout. Always kind and efficient, felt cared for in the sky

Japan Airlines
8.3
Very good
1,478 reviews
ANA
8.5
Very good
928 reviews
Check prices

Boarding

8.6

Food

7.8

Crew

8.8

Comfort

8.3

Entertainment

8.0

Overall

8.5

Reviews

1 / 10

They’re so kind and professional on ANA, I ordered a special meal and they were lovely throughout. Always kind and efficient, felt cared for in the sky

Air New Zealand
8.3
Very good
635 reviews
ANA
8.5
Very good
928 reviews
Check prices

Boarding

8.6

Food

7.8

Crew

8.8

Comfort

8.3

Entertainment

8.0

Overall

8.5

Reviews

1 / 10

They’re so kind and professional on ANA, I ordered a special meal and they were lovely throughout. Always kind and efficient, felt cared for in the sky

Qantas Airways
7.7
Good
975 reviews
ANA
8.5
Very good
928 reviews
Check prices

Boarding

8.6

Food

7.8

Crew

8.8

Comfort

8.3

Entertainment

8.0

Overall

8.5

Reviews

1 / 10

They’re so kind and professional on ANA, I ordered a special meal and they were lovely throughout. Always kind and efficient, felt cared for in the sky

LATAM Airlines
7.6
Good
2,444 reviews
ANA
8.5
Very good
928 reviews
Check prices

Boarding

8.6

Food

7.8

Crew

8.8

Comfort

8.3

Entertainment

8.0

Overall

8.5

Reviews

1 / 10

They’re so kind and professional on ANA, I ordered a special meal and they were lovely throughout. Always kind and efficient, felt cared for in the sky

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 $1,500 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Sydney for under $1,500. The cheapest flight booked recently is on Air New Zealand for just $1,413, but on average you can expect to pay $1,824.

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

    According to our current data, Air New Zealand ($1,413), Qantas Airways ($1,606), and Air Canada ($1,644) offers the cheapest pricing from St. Louis to Sydney. Air New Zealand is priced at 16% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $1,076. Air New Zealand flights start at $1,277 while deals on Qantas Airways start at $1,317 one-way.

  • 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 5/7.

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.

Kansas City to Sydney flights
Columbia to Sydney flights

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 2,752,338 searches. Data last updated May 8, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$983Average$1,364FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$1,013Average$1,535FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest$1,176Average$1,319FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest$1,214Average$1,550FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,257Average$1,780FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air New ZealandCheapest$1,422Average$1,597FlexibilityNo 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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Fly with Cheapflights

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

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Sydney.

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

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