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

Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $1,679. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $1,706 and $1,733, respectively. Users have found that American Airlines is 23% cheaper than the other options available to this destination. Find deals

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

Travellers seeking maximum savings on their Sydney to St. Louis flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time. Find deals

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

The most popular airlines flying from Sydney to St. Louis are American Airlines, Air Canada and Qantas Airways. Something to consider prior to booking your flight.

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

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

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

November can be a great time to fly to St. Louis from Sydney with a flight ticket averaging about $2,187. Cheapflights users have found deals in the month of November for as cheap as $1,635. The most expensive prices can be found in the month of August.

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 holiday 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.

$1,601+ Flights from Sydney to St. Louis

Cheap flight deals from Sydney to St. Louis

Round-trip from	$1,679
Popular in	August
Cheapest in	November
Average price	$1,859

American Airlines
18/8-8/11
3 total stops
69h 31m total
Sydney to St. Louis

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($370 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($141 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

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 13 June 2025.

Tue 21/1010:20SYD - STL

2 stops44h 58mMultiple Airlines

Tue 11/1116:43STL - SYD

2 stops23h 52mMultiple Airlines

Deal found 12/6$1,601

Mon 18/817:45SYD - STL

2 stops45h 31mAmerican Airlines

Sat 8/1113:55STL - SYD

1 stop24h 00mAmerican Airlines

Deal found 12/6$1,679

Mon 18/809:25SYD - STL

2 stops28h 49mDelta

Sat 8/1112:10STL - SYD

2 stops27h 25mDelta

Deal found 12/6$1,706

Mon 18/810:20SYD - STL

1 stop21h 25mUnited Airlines

Sat 8/1111:10STL - SYD

1 stop26h 50mUnited Airlines

Deal found 11/6$1,733

Tue 21/1010:10SYD - STL

1 stop28h 43mQantas Airways

Tue 11/1106:15STL - SYD

1 stop33h 45mQantas Airways

Deal found 12/6$1,735

Sun 22/608:55SYD - STL

2 stops53h 04mJapan Airlines

Sun 29/608:35STL - SYD

2 stops54h 45mJapan Airlines

Deal found 10/6$2,131

Sat 26/709:20SYD - STL

3 stops50h 30mAir Canada

Sat 2/816:00STL - SYD

2 stops48h 20mAir Canada

Deal found 10/6$2,192

Best flights from Sydney to St. Louis
Discover carefully curated flight deals from Sydney to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 June 2025.

Mon 18/817:45SYD - STL

2 stops45h 31mAmerican Airlines

Sat 8/1113:55STL - SYD

1 stop24h 00mAmerican Airlines

Deal found 12/6$1,679

Mon 18/809:25SYD - STL

2 stops28h 49mDelta

Sat 8/1112:10STL - SYD

2 stops27h 25mDelta

Deal found 12/6$1,706

Mon 18/810:20SYD - STL

1 stop21h 25mUnited Airlines

Sat 8/1111:10STL - SYD

1 stop26h 50mUnited Airlines

Deal found 11/6$1,733

Fri 18/717:45SYD - STL

1 stop20h 45mQantas Airways

Thu 31/706:14STL - SYD

1 stop33h 51mQantas Airways

Deal found 12/6$1,963

Sat 26/713:45SYD - STL

3 stops35h 07mMultiple Airlines

Sat 2/819:38STL - SYD

2 stops25h 07mMultiple Airlines

Deal found 10/6$1,968

Sun 22/608:55SYD - STL

2 stops53h 04mJapan Airlines

Sun 29/608:35STL - SYD

2 stops54h 45mJapan Airlines

Deal found 10/6$2,131

Sat 26/709:20SYD - STL

3 stops50h 30mAir Canada

Sat 2/816:00STL - SYD

2 stops48h 20mAir Canada

Deal found 10/6$2,192

Last-minute flights from Sydney to St. Louis
Discover last-minute flight deals from Sydney to St. Louis. Data last updated 13 June 2025 and is based on user searches.

Sun 22/609:25SYD - STL

2 stops37h 58mDelta

Sun 29/606:30STL - SYD

2 stops33h 05mDelta

Deal found 11/6$1,759

Sun 22/608:55SYD - STL

2 stops53h 04mJapan Airlines

Sun 29/608:35STL - SYD

2 stops54h 45mJapan Airlines

Deal found 10/6$2,131

Sun 22/609:30SYD - STL

2 stops27h 45mUnited Airlines

Sun 29/617:51STL - SYD

1 stop22h 04mUnited Airlines

Deal found 10/6$2,430

Sun 22/609:10SYD - STL

1 stop28h 49mAmerican Airlines

Sun 29/606:28STL - SYD

1 stop33h 37mAmerican Airlines

Deal found 10/6$2,937

Sun 22/620:25SYD - STL

3 stops26h 40mMultiple Airlines

Sun 29/612:28STL - SYD

2 stops28h 27mMultiple Airlines

Deal found 12/6$3,810

Fri 18/717:45SYD - STL

1 stop20h 45mQantas Airways

Thu 31/706:14STL - SYD

1 stop33h 51mQantas Airways

Deal found 12/6$1,963

Fri 18/710:25SYD - STL

2 stops23h 43mAmerican Airlines

Thu 31/706:14STL - SYD

1 stop33h 51mAmerican Airlines

Deal found 12/6$2,005

Sat 26/713:45SYD - STL

3 stops35h 07mMultiple Airlines

Sat 2/819:38STL - SYD

2 stops25h 07mMultiple Airlines

Deal found 10/6$1,968

Sat 26/709:20SYD - STL

3 stops50h 30mAir Canada

Sat 2/816:00STL - SYD

2 stops48h 20mAir Canada

Deal found 10/6$2,192

Sun 27/709:30SYD - STL

2 stops22h 01mUnited Airlines

Sun 3/811:25STL - SYD

2 stops28h 35mUnited Airlines

Deal found 11/6$2,141

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

17:45-00:16

2 stops45h 31m

Lambert-St Louis

Sat 8/11

13:55-06:55

1 stop24h 00m

$1,679

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:25-23:14

2 stops28h 49m

Lambert-St Louis

Sat 8/11

12:10-08:35

2 stops27h 25m

$1,706

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:30-16:31

2 stops22h 01m

Lambert-St Louis

Sat 8/11

16:35-07:00

1 stop21h 25m

$1,733

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 18/7

17:45-23:30

1 stop20h 45m

Lambert-St Louis

Thu 31/7

06:14-07:05

1 stop33h 51m

$1,963

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 26/7

13:45-09:52

3 stops35h 07m

Lambert-St Louis

Sat 2/8

19:38-11:45

2 stops25h 07m

$1,968

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 22/6

08:55-22:59

2 stops53h 04m

Lambert-St Louis

Sun 29/6

08:35-06:20

2 stops54h 45m

$2,131

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 26/7

09:20-20:50

3 stops50h 30m

Lambert-St Louis

Sat 2/8

16:00-07:20

2 stops48h 20m

$2,192

Flights are sorted by cheapest return flights first.

Deals found on 12/6

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 return 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 time of day to fly from SYD to STL?

It’s typically best to fly out from Sydney to St. Louis in the morning. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing St. Louis

To help decide which airline to fly from Sydney to St. Louis, see what other customers have to say about Japan Airlines, Delta and Qantas Airways. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Japan Airlines

8.3

Very Good

1,490 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,May 2025

DEL - HND

1. No information on business class lounge access in Delhi airport. 2. Special meals ordered confirmed in JAL website but not in confirmation email. So meal Was not served on the flight.

Japan Airlines

8.3

Very Good

1,490 reviews

Japan Airlines

8.3

Very Good

1,490 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,May 2025

DEL - HND

1. No information on business class lounge access in Delhi airport. 2. Special meals ordered confirmed in JAL website but not in confirmation email. So meal Was not served on the flight.

Delta

8.0

Very Good

7,946 reviews

Japan Airlines

8.3

Very Good

1,490 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,May 2025

DEL - HND

1. No information on business class lounge access in Delhi airport. 2. Special meals ordered confirmed in JAL website but not in confirmation email. So meal Was not served on the flight.

Qantas Airways

7.5

Good

854 reviews

Japan Airlines

8.3

Very Good

1,490 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,May 2025

DEL - HND

1. No information on business class lounge access in Delhi airport. 2. Special meals ordered confirmed in JAL website but not in confirmation email. So meal Was not served on the flight.

United Airlines

7.4

Good

8,790 reviews

Japan Airlines

8.3

Very Good

1,490 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,May 2025

DEL - HND

1. No information on business class lounge access in Delhi airport. 2. Special meals ordered confirmed in JAL website but not in confirmation email. So meal Was not served on the flight.

American Airlines

7.2

Good

10,000 reviews

Japan Airlines

8.3

Very Good

1,490 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,May 2025

DEL - HND

1. No information on business class lounge access in Delhi airport. 2. Special meals ordered confirmed in JAL website but not in confirmation email. So meal Was not served on the flight.

Related info for your journey

What are the cheapest airlines flying from Sydney to St. Louis round-trip?
Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $1,679. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $1,706 and $1,733, respectively. Users have found that American Airlines is 23% 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 holiday 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Sydney to St. Louis

Sydney to Kansas City flights

Complete your trip

St. Louis car hire

Lambert-St Louis Airport car hire

Springfield Capital Airport car hire

Belleville Airport car hire

Marion Williamson County Airport car hire

Central West End car hire

Midtown car hire

Soulard car hire

Top 4 airlines flying from Sydney to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,409	Average$2,422	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest$1,511	Average$1,929	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Qantas Airways	Cheapest$1,741	Average$2,203	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
American Airlines	Cheapest$1,839	Average$3,178	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

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

When you search for this flight from Sydney to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Sydney to St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes! Cheapflights helps users easily find flights from Sydney to St. Louis with no change fees.

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

Not ready to book yet? You can track prices for flights from Sydney to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Sydney to St. Louis from $1,601

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Sydney to St. Louis

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Sydney to St. Louis

Cheapest flights from Sydney to St. LouisExplore 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 13 June 2025.

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 13 June 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

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.

Cheapflights Insights

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

What is the cheapest time of day to fly from SYD to STL?

Find hourly flight availability from Sydney to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

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?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Sydney to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Sydney to St. Louis

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 13 June 2025.