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

Our cheapest airline available from St. Louis to Sydney is Fiji Airways. Our recent data shows that you can find tickets from as low as $1,859 on this airline. Additional options worth looking into are Air Canada and American Airlines, starting at $2,049 and $2,398 round-trip. Fiji Airways is 24% cheaper than the average price of flights available within the next 90 days to this destination. Find deals

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

The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $1,144. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from St. Louis to Sydney for a low price. Find deals

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 61 days in advance, which can save you up to 76% on flights from St. Louis to Sydney compared to booking the week you need them. Waiting 61 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 $1,920. For sooner than that we have options available in the next 3 days from $2,798.

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

The best pricing can be found in the month of March. Prices to Sydney from St. Louis average $2,472. You can even find prices in March for less than $2,472, as users have found deals to Sydney from as low as $1,503. 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 26%.

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

A simple way to save on the total cost of your ticket is to fly from St. Louis to Sydney at midday. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the morning.

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.

$803+ Flights from St. Louis to Sydney

Cheap flight deals from St. Louis to Sydney

Round-trip from	$1,859
One-way from	$803
Popular in	December
Cheapest in	March
Average price	$2,330

Fiji Airways
15/2-18/2
4 total stops
48h 22m total
St. Louis to Sydney

Search Deals

25/2
3 total stops
49h 04m total
St. Louis to Sydney

Search Deals

High demand for flights, 3% potential price rise

Search Deals

Best time to find cheap flights, 2% potential price drop

Search Deals

Average for round-trip flights in January 2025

Search Deals

Find flight deals from St. Louis to Sydney

Cheapest flights from St. Louis to Sydney
Explore the most affordable flight options available from St. Louis to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 January 2025.

Mon 25/815:15STL - SYD

2 stops27h 10mANA

Wed 3/911:50SYD - STL

2 stops43h 45mANA

Deal found 17/1$1,463

Thu 28/814:55STL - SYD

2 stops32h 45mMultiple Airlines

Fri 5/916:20SYD - STL

2 stops22h 36mMultiple Airlines

Deal found 16/1$1,662

Sat 15/217:37STL - SYD

2 stops25h 53mFiji Airways

Tue 18/214:00SYD - STL

2 stops22h 29mFiji Airways

Deal found 15/1$1,859

Mon 25/813:30STL - SYD

3 stops50h 50mAir Canada

Wed 3/909:20SYD - STL

2 stops44h 56mAir Canada

Deal found 17/1$1,986

Mon 25/814:49STL - SYD

2 stops25h 16mAmerican Airlines

Wed 3/909:10SYD - STL

1 stop28h 49mAmerican Airlines

Deal found 17/1$2,324

Mon 25/818:00STL - SYD

1 stop21h 55mUnited Airlines

Wed 3/910:20SYD - STL

1 stop29h 07mUnited Airlines

Deal found 16/1$2,340

Mon 18/814:15STL - SYD

2 stops25h 20mDelta

Mon 1/909:25SYD - STL

2 stops23h 38mDelta

Deal found 17/1$2,362

Thu 21/816:17STL - SYD

2 stops25h 28mAir New Zealand

Sun 31/810:20SYD - STL

1 stop21h 43mAir New Zealand

Deal found 17/1$2,399

Sun 2/214:49STL - SYD

2 stops35h 56mAlaska Airlines

Fri 28/221:40SYD - STL

2 stops33h 45mAlaska Airlines

Deal found 15/1$2,454

Tue 19/818:10STL - SYD

1 stop21h 45mQantas Airways

Mon 1/912:10SYD - STL

1 stop18h 58mQantas Airways

Deal found 17/1$2,710

Best flights from St. Louis to Sydney
Discover carefully curated flight deals from St. Louis to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 January 2025.

Sat 15/217:37STL - SYD

2 stops25h 53mFiji Airways

Tue 18/214:00SYD - STL

2 stops22h 29mFiji Airways

Deal found 15/1$1,859

Mon 19/513:30STL - SYD

2 stops26h 50mAir Canada

Fri 23/509:20SYD - STL

2 stops44h 56mAir Canada

Deal found 16/1$2,049

Thu 30/114:49STL - SYD

2 stops31h 46mMultiple Airlines

Tue 4/309:45SYD - STL

2 stops26h 44mMultiple Airlines

Deal found 16/1$2,311

Mon 2/618:19STL - SYD

1 stop21h 46mAmerican Airlines

Fri 13/609:10SYD - STL

1 stop28h 48mAmerican Airlines

Deal found 17/1$2,398

Sun 13/413:12STL - SYD

2 stops26h 48mUnited Airlines

Fri 25/410:20SYD - STL

1 stop21h 32mUnited Airlines

Deal found 15/1$2,428

Sun 2/214:49STL - SYD

2 stops35h 56mAlaska Airlines

Fri 28/221:40SYD - STL

2 stops33h 45mAlaska Airlines

Deal found 15/1$2,454

Sat 8/216:36STL - SYD

2 stops23h 09mAir New Zealand

Sat 22/212:10SYD - STL

1 stop23h 46mAir New Zealand

Deal found 17/1$2,707

Sun 2/215:41STL - SYD

1 stop21h 54mQantas Airways

Fri 28/211:15SYD - STL

1 stop28h 53mQantas Airways

Deal found 15/1$2,860

Sun 13/416:43STL - SYD

3 stops49h 52mLATAM Airlines

Fri 25/411:50SYD - STL

3 stops36h 03mLATAM Airlines

Deal found 15/1$4,948

Sun 23/306:15STL - SYD

2 stops46h 35mCathay Pacific

Thu 17/407:35SYD - STL

2 stops30h 41mCathay Pacific

Deal found 16/1$5,677

Mon 2/614:57STL - SYD

3 stops47h 08mBritish Airways

Fri 13/614:40SYD - STL

3 stops40h 18mBritish Airways

Deal found 16/1$6,722

Sat 15/311:05STL - SYD

2 stops65h 10mANA

Wed 26/321:45SYD - STL

2 stops32h 38mANA

Deal found 15/1$10,219

Last-minute flights from St. Louis to Sydney
Discover last-minute flight deals from St. Louis to Sydney. Data last updated 17 January 2025 and is based on user searches.

Thu 30/114:49STL - SYD

2 stops31h 46mMultiple Airlines

Tue 4/309:45SYD - STL

2 stops26h 44mMultiple Airlines

Deal found 16/1$2,311

Sun 2/214:49STL - SYD

2 stops35h 56mAlaska Airlines

Fri 28/221:40SYD - STL

2 stops33h 45mAlaska Airlines

Deal found 15/1$2,454

Sun 2/215:41STL - SYD

1 stop21h 54mQantas Airways

Fri 28/211:15SYD - STL

1 stop28h 53mQantas Airways

Deal found 15/1$2,860

Sat 8/216:36STL - SYD

2 stops23h 09mAir New Zealand

Sat 22/212:10SYD - STL

1 stop23h 46mAir New Zealand

Deal found 17/1$2,707

Sat 15/217:37STL - SYD

2 stops25h 53mFiji Airways

Tue 18/214:00SYD - STL

2 stops22h 29mFiji Airways

Deal found 15/1$1,859

Sat 15/212:00STL - SYD

3 stops49h 55mBritish Airways

Tue 18/216:20SYD - STL

3 stops46h 42mBritish Airways

Deal found 15/1$17,174

Sun 16/215:50STL - SYD

2 stops48h 45mAir Canada

Tue 25/211:20SYD - STL

2 stops44h 46mAir Canada

Deal found 16/1$2,456

Sun 16/216:30STL - SYD

1 stop21h 30mUnited Airlines

Tue 25/216:15SYD - STL

2 stops22h 51mUnited Airlines

Deal found 16/1$2,589

Mon 17/213:03STL - SYD

2 stops28h 27mANA

Wed 5/321:45SYD - STL

2 stops30h 17mANA

Deal found 16/1$11,328

One-way flights from St. Louis to Sydney
Search for one-way flight options from St. Louis to Sydney. Find affordable one-way fares based on user searches. Data last updated 17 January 2025.

Tue 25/218:26STL - SYD

3 stops49h 04mMultiple Airlines

Deal found 16/1$803

Sun 29/613:30STL - SYD

2 stops26h 50mAir Canada

Deal found 16/1$1,144

Sun 29/606:09STL - SYD

1 stop33h 46mUnited Airlines

Deal found 16/1$1,374

Wed 18/606:29STL - SYD

1 stop33h 36mAmerican Airlines

Deal found 16/1$1,606

Find flights from St. Louis to Sydney within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 15/2

17:37-12:30

2 stops25h 53m

Sydney Kingsford Smith

Tue 18/2

14:00-19:29

2 stops22h 29m

$1,859

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 19/5

13:30-07:20

2 stops26h 50m

Sydney Kingsford Smith

Fri 23/5

09:20-15:16

2 stops44h 56m

$2,049

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 30/1

14:49-15:35

2 stops31h 46m

Sydney Kingsford Smith

Tue 4/3

09:45-19:29

2 stops26h 44m

$2,311

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 2/6

18:19-07:05

1 stop21h 46m

Sydney Kingsford Smith

Fri 13/6

09:10-22:58

1 stop28h 48m

$2,398

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 13/4

13:12-07:00

2 stops26h 48m

Sydney Kingsford Smith

Fri 25/4

10:20-16:52

1 stop21h 32m

$2,428

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 2/2

14:49-19:45

2 stops35h 56m

Sydney Kingsford Smith

Fri 28/2

21:40-14:25

2 stops33h 45m

$2,454

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 8/2

16:36-08:45

2 stops23h 09m

Sydney Kingsford Smith

Sat 22/2

12:10-18:56

1 stop23h 46m

$2,707

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 2/2

15:41-06:35

1 stop21h 54m

Sydney Kingsford Smith

Fri 28/2

11:15-23:08

1 stop28h 53m

$2,860

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 13/4

16:43-09:35

3 stops49h 52m

Sydney Kingsford Smith

Fri 25/4

11:50-08:53

3 stops36h 03m

$4,948

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 23/3

06:15-20:50

2 stops46h 35m

Sydney Kingsford Smith

Thu 17/4

07:35-23:16

2 stops30h 41m

$5,677

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 16 results

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

Have a flexible travel schedule? Discover the best time to fly to Sydney from St. Louis 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.

Travel insights for flights from St. Louis to Sydney

Get recent, data-driven insights about flights from St. Louis to Sydney including ideal travel times, pricing trends, and more.

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

To ensure you get the cheapest price possible for a flight from St. Louis to Sydney, you should look to book at least 60 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.

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

Currently, May is the cheapest month in which you can book a flight from St. Louis to Sydney (average of $129). Flying from St. Louis to Sydney in October is currently the most expensive (average of $171). 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 Sydney by month

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Sydney

ANA

8.4

Very Good

847 reviews

Check prices

Reviews

1 / 10

Your hospitality was excellent, very polite and kind. The meal was tasty and good. The buns were cold. Who likes cold buns?

ANA

8.4

Very Good

847 reviews

ANA

8.4

Very Good

847 reviews

Check prices

Reviews

1 / 10

Your hospitality was excellent, very polite and kind. The meal was tasty and good. The buns were cold. Who likes cold buns?

Fiji Airways

8.1

Very Good

187 reviews

ANA

8.4

Very Good

847 reviews

Check prices

Reviews

1 / 10

Your hospitality was excellent, very polite and kind. The meal was tasty and good. The buns were cold. Who likes cold buns?

Alaska Airlines

8.0

Very Good

9,684 reviews

ANA

8.4

Very Good

847 reviews

Check prices

Reviews

1 / 10

Your hospitality was excellent, very polite and kind. The meal was tasty and good. The buns were cold. Who likes cold buns?

Air New Zealand

7.9

Good

485 reviews

ANA

8.4

Very Good

847 reviews

Check prices

Reviews

1 / 10

Your hospitality was excellent, very polite and kind. The meal was tasty and good. The buns were cold. Who likes cold buns?

Cathay Pacific

7.5

Good

826 reviews

ANA

8.4

Very Good

847 reviews

Check prices

Reviews

1 / 10

Your hospitality was excellent, very polite and kind. The meal was tasty and good. The buns were cold. Who likes cold buns?

Related info for your journey

What are the cheapest airlines flying from St. Louis to Sydney round-trip?
Our cheapest airline available from St. Louis to Sydney is Fiji Airways. Our recent data shows that you can find tickets from as low as $1,859 on this airline. Additional options worth looking into are Air Canada and American Airlines, starting at $2,049 and $2,398 round-trip. Fiji Airways is 24% 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 Air Canada, with whom users have recently found tickets for as low as $1,144. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from St. Louis to Sydney for a low price.
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.
What is the cheapest month to book a flight from St. Louis to Sydney?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Sydney (average of $129). Flying from St. Louis to Sydney in October is currently the most expensive (average of $171). 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

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Katoomba

Randwick

Manly

Penrith

Coogee

Cronulla

Bondi Beach

Lithgow

Terrigal

Leura

Swansea

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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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Cheap flights from St. Louis to Sydney from $803

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 25/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from St. Louis to Sydney

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Sydney

Cheapest flights from St. Louis to SydneyExplore the most affordable flight options available from St. Louis to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 January 2025.

Explore the most affordable flight options available from St. Louis to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 January 2025.

Find flights from St. Louis to Sydney within your budget

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

Have a flexible travel schedule? Discover the best time to fly to Sydney from St. Louis with our price prediction graph.

Travel insights for flights from St. Louis to Sydney

Get recent, data-driven insights about flights from St. Louis to Sydney including ideal travel times, pricing trends, and more.

How far ahead should I 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 10 January 2025.

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

Rainfall in Sydney by month

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

Temperature in Sydney by month

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

Reviews of airlines servicing Sydney

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.

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

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

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

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

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

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

Travelling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

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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.

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 St. Louis to Sydney?

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

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

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

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Cheapest flights from St. Louis to Sydney
Explore the most affordable flight options available from St. Louis to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 January 2025.