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St. Louis

$1,207+ Cheap flights from Sydney (SYD) to St. Louis (STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Sydney to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to St. Louis (STL). 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 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,207
(Delta)

Popular in

August

Cheapest in

March

Average price

$1,432
Provider with most accurate pricing for Sydney Kingsford Smith-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Lambert-St Louis flights.
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From Sydney Kingsford Smith to Lambert-St Louis
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Highest demand for flights based on searches. 8% potential increase in price ($131 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Sydney to St. Louis

Cheapest flights from Sydney to St. Louis
Explore the most affordable flight options available from Sydney to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This Delta deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:25 amSYD - STL
2 stops23h 38mDelta
Sat 11/86:00 amSTL - SYD
2 stops33h 35mDelta
Deal found 4/30$1,207
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:30 amSYD - STL
2 stops24h 23mUnited Airlines
Sat 11/87:00 pmSTL - SYD
1 stop21h 15mUnited Airlines
Deal found 4/29$1,295
This Ovago deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/288:55 amSYD - STL
2 stops53h 09mJapan Airlines
Wed 6/47:00 amSTL - SYD
2 stops32h 20mJapan Airlines
Deal found 4/28$1,391
This Air Canada deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/510:20 amSYD - STL
3 stops49h 37mMultiple Airlines
Sat 10/114:40 pmSTL - SYD
2 stops23h 40mMultiple Airlines
Deal found 4/30$1,585
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1210:25 amSYD - STL
2 stops23h 08mAmerican Airlines
Sat 5/316:52 amSTL - SYD
1 stop33h 13mAmerican Airlines
Deal found 4/29$1,677
This Gurufare deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/309:10 amSYD - STL
1 stop28h 54mQantas Airways
Fri 6/66:28 amSTL - SYD
1 stop33h 37mQantas Airways
Deal found 4/30$1,731
This Booking.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/289:20 amSYD - STL
3 stops49h 38mAir Canada
Wed 6/49:10 amSTL - SYD
2 stops31h 10mAir Canada
Deal found 4/28$1,813
This Booking.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/59:55 pmSYD - STL
3 stops56h 24mTurkish Airlines
Sat 10/113:30 pmSTL - SYD
3 stops60h 30mTurkish Airlines
Deal found 4/29$2,022

Cheapflights Fare Finder

Customize your flight search to find flights from Sydney to St. Louis 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 2,558,603 searches. Data last updated May 1, 2025.
Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

Fly from

Sydney

Fly to

St. Louis

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

9:25 am-6:03 pm

2 stops23h 38m

Lambert-St Louis

Sat 11/8

6:00 am-8:35 am

2 stops33h 35m

$1,207

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

9:30 am-6:53 pm

2 stops24h 23m

Lambert-St Louis

Sat 11/8

7:00 pm-9:15 am

1 stop21h 15m

$1,295

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/28

8:55 am-11:04 pm

2 stops53h 09m

Lambert-St Louis

Wed 6/4

7:00 am-6:20 am

2 stops32h 20m

$1,391

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 10/5

10:20 am-7:57 pm

3 stops49h 37m

Lambert-St Louis

Sat 10/11

4:40 pm-8:20 am

2 stops23h 40m

$1,585

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 5/12

10:25 am-6:33 pm

2 stops23h 08m

Lambert-St Louis

Sat 5/31

6:52 am-7:05 am

1 stop33h 13m

$1,677

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 5/30

9:10 am-11:04 pm

1 stop28h 54m

Lambert-St Louis

Fri 6/6

6:28 am-7:05 am

1 stop33h 37m

$1,731

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/28

9:20 am-7:58 pm

3 stops49h 38m

Lambert-St Louis

Wed 6/4

9:10 am-7:20 am

2 stops31h 10m

$1,813

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 10/5

9:55 pm-2:19 pm

3 stops56h 24m

Lambert-St Louis

Sat 10/11

3:30 pm-8:00 pm

3 stops60h 30m

$2,022

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Compare providers for flights from Sydney to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sydney to St. Louis in May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sydney-St. Louis flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Sydney-St. Louis flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Sydney-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sydney-St. Louis flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sydney-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sydney to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Sydney with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sydney to St. Louis

What is the cheapest month to book a flight from Sydney to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $311). Flying from Sydney to St. Louis in March is currently the most expensive (average of $356). 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated May 1, 2025.
Japan Airlines
8.3
Very good
1,464 reviews

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very good
1,464 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Delta
8.0
Very good
7,934 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Qantas Airways
7.5
Good
829 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
United Airlines
7.4
Good
8,696 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Turkish Airlines
7.3
Good
3,790 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Related info for your journey

Find useful and relevant information for your journey from Sydney to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Our cheapest airline available from Sydney to St. Louis is Delta. Our recent data shows that you can find tickets from as low as $1,207 on this airline. Additional options worth looking into are United Airlines and Japan Airlines, starting at $1,295 and $1,391 round-trip. Users have found that Delta is 16% cheaper than the other options available to this destination.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Sydney to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $311). Flying from Sydney to St. Louis in March is currently the most expensive (average of $356). 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.

See more FAQs

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
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O'Fallon

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Top airline flying from Sydney to St. Louis

Discover the top airline that operate flights from Sydney to St. Louis. 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 2,558,603 searches. Data last updated May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,101Average$1,192FlexibilityNo cancel feeOn-time74%

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