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 $1,800 on this airline. Additional options worth looking into are Air New Zealand and Air Canada, starting at $1,836 and $1,957 round-trip. Fiji Airways is 26% cheaper than the average price of flights available within the next 90 days to this destination. 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 33 days in advance, which can save you up to 71% on flights from St. Louis to Sydney compared to booking the week you need them. Waiting 33 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 $1,870. For sooner than that we have options available in the next 3 days from $2,737.

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

The best pricing can be found in the month of November. Prices to Sydney from St. Louis average $2,438. You can even find prices in November for less than $2,438, as users have found deals to Sydney from as low as $1,932. 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 22%.

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.

$1,800+ Flights from St. Louis to Sydney

Cheap flight deals from St. Louis to Sydney

Round-trip from	$1,800
Popular in	December
Cheapest in	November
Average price	$2,237

Fiji Airways
10/5-31/5
4 total stops
49h 42m total
St. Louis to Sydney

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($317 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($80 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 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 21 February 2025.

Sat 10/519:05STL - SYD

2 stops25h 40mFiji Airways

Sat 31/513:45SYD - STL

2 stops24h 02mFiji Airways

Deal found 19/2$1,800

Wed 14/516:50STL - SYD

2 stops26h 45mAir New Zealand

Wed 28/509:55SYD - STL

2 stops25h 54mAir New Zealand

Deal found 20/2$1,836

Sat 23/813:30STL - SYD

2 stops26h 50mAir Canada

Mon 1/909:20SYD - STL

2 stops25h 40mAir Canada

Deal found 21/2$1,936

Wed 14/513:41STL - SYD

3 stops29h 54mMultiple Airlines

Wed 28/511:50SYD - STL

3 stops27h 09mMultiple Airlines

Deal found 20/2$2,016

Fri 21/217:37STL - SYD

2 stops44h 58mQantas Airways

Fri 28/211:15SYD - STL

1 stop28h 53mQantas Airways

Deal found 20/2$2,106

Fri 21/215:43STL - SYD

2 stops24h 17mAmerican Airlines

Fri 28/211:15SYD - STL

2 stops22h 18mAmerican Airlines

Deal found 20/2$2,110

Sun 2/316:30STL - SYD

1 stop21h 30mUnited Airlines

Sun 9/311:50SYD - STL

1 stop24h 59mUnited Airlines

Deal found 19/2$2,128

Sun 2/311:50STL - SYD

2 stops27h 45mDelta

Mon 10/313:15SYD - STL

2 stops21h 18mDelta

Deal found 19/2$2,149

Wed 7/515:43STL - SYD

3 stops36h 17mTurkish Airlines

Sun 11/520:55SYD - STL

3 stops56h 52mTurkish Airlines

Deal found 20/2$4,001

Mon 3/311:57STL - SYD

3 stops49h 58mBritish Airways

Mon 10/316:20SYD - STL

3 stops45h 58mBritish Airways

Deal found 19/2$5,900

Mon 3/310:26STL - SYD

2 stops38h 14mLATAM Airlines

Tue 11/311:40SYD - STL

3 stops40h 20mLATAM Airlines

Deal found 19/2$6,397

Wed 4/608:25STL - SYD

2 stops43h 50mANA

Wed 18/611:50SYD - STL

2 stops39h 30mANA

Deal found 20/2$9,836

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 21 February 2025.

Sat 10/519:05STL - SYD

2 stops25h 40mFiji Airways

Sat 31/513:45SYD - STL

2 stops24h 02mFiji Airways

Deal found 19/2$1,800

Wed 14/516:50STL - SYD

2 stops26h 45mAir New Zealand

Wed 28/509:55SYD - STL

2 stops25h 54mAir New Zealand

Deal found 20/2$1,836

Thu 3/415:30STL - SYD

2 stops48h 50mAir Canada

Thu 10/409:20SYD - STL

2 stops44h 29mAir Canada

Deal found 21/2$1,957

Wed 14/513:41STL - SYD

3 stops29h 54mMultiple Airlines

Wed 28/511:50SYD - STL

3 stops27h 09mMultiple Airlines

Deal found 20/2$2,016

Mon 10/315:48STL - SYD

2 stops25h 12mAmerican Airlines

Fri 21/311:15SYD - STL

2 stops22h 44mAmerican Airlines

Deal found 20/2$2,110

Tue 4/308:40STL - SYD

1 stop29h 20mUnited Airlines

Mon 10/311:50SYD - STL

1 stop19h 26mUnited Airlines

Deal found 19/2$2,128

Sat 22/306:50STL - SYD

2 stops32h 55mDelta

Sat 29/313:15SYD - STL

2 stops35h 55mDelta

Deal found 21/2$2,449

Fri 21/306:15STL - SYD

1 stop34h 45mQantas Airways

Sun 23/311:15SYD - STL

1 stop27h 54mQantas Airways

Deal found 21/2$3,338

Wed 7/515:43STL - SYD

3 stops36h 17mTurkish Airlines

Sun 11/520:55SYD - STL

3 stops56h 52mTurkish Airlines

Deal found 20/2$4,001

Mon 3/311:57STL - SYD

3 stops49h 58mBritish Airways

Mon 10/316:20SYD - STL

3 stops45h 58mBritish Airways

Deal found 19/2$5,900

Mon 3/310:26STL - SYD

2 stops38h 14mLATAM Airlines

Tue 11/311:40SYD - STL

3 stops40h 20mLATAM Airlines

Deal found 19/2$6,397

Wed 4/608:25STL - SYD

2 stops43h 50mANA

Wed 18/611:50SYD - STL

2 stops39h 30mANA

Deal found 20/2$9,836

Last-minute flights from St. Louis to Sydney
Discover last-minute flight deals from St. Louis to Sydney. Data last updated 21 February 2025 and is based on user searches.

Fri 21/217:37STL - SYD

2 stops44h 58mQantas Airways

Fri 28/211:15SYD - STL

1 stop28h 53mQantas Airways

Deal found 20/2$2,106

Fri 21/215:43STL - SYD

2 stops24h 17mAmerican Airlines

Fri 28/211:15SYD - STL

2 stops22h 18mAmerican Airlines

Deal found 20/2$2,110

Mon 24/206:15STL - SYD

2 stops35h 10mAir New Zealand

Wed 26/219:15SYD - STL

2 stops42h 29mAir New Zealand

Deal found 20/2$2,146

Sun 2/315:50STL - SYD

2 stops48h 45mAir Canada

Sun 9/311:20SYD - STL

2 stops43h 46mAir Canada

Deal found 19/2$2,063

Sun 2/315:43STL - SYD

2 stops24h 17mAmerican Airlines

Sun 9/311:15SYD - STL

1 stop27h 54mAmerican Airlines

Deal found 19/2$2,110

Sun 2/306:15STL - SYD

1 stop31h 45mUnited Airlines

Mon 10/311:50SYD - STL

1 stop19h 26mUnited Airlines

Deal found 19/2$2,128

Sun 2/315:35STL - SYD

2 stops24h 00mDelta

Tue 11/313:15SYD - STL

2 stops25h 48mDelta

Deal found 19/2$2,149

Sun 2/316:30STL - SYD

1 stop21h 30mUnited Airlines

Sun 9/311:50SYD - STL

1 stop24h 59mUnited Airlines

Deal found 19/2$2,128

Mon 3/316:30STL - SYD

2 stops27h 10mAir New Zealand

Tue 11/312:10SYD - STL

1 stop21h 43mAir New Zealand

Deal found 19/2$2,642

Mon 3/311:20STL - SYD

3 stops30h 05mMultiple Airlines

Mon 10/311:45SYD - STL

2 stops26h 22mMultiple Airlines

Deal found 19/2$3,126

Mon 3/317:36STL - SYD

3 stops56h 29mTurkish Airlines

Sun 9/321:00SYD - STL

3 stops57h 23mTurkish Airlines

Deal found 19/2$4,015

Mon 3/311:57STL - SYD

3 stops49h 58mBritish Airways

Mon 10/316:20SYD - STL

3 stops45h 58mBritish Airways

Deal found 19/2$5,900

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 10/5

19:05-11:45

2 stops25h 40m

Sydney Kingsford Smith

Sat 31/5

13:45-22:47

2 stops24h 02m

$1,800

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 14/5

16:50-10:35

2 stops26h 45m

Sydney Kingsford Smith

Wed 28/5

09:55-20:49

2 stops25h 54m

$1,836

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 3/4

15:30-08:20

2 stops48h 50m

Sydney Kingsford Smith

Thu 10/4

09:20-14:49

2 stops44h 29m

$1,957

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 14/5

13:41-10:35

3 stops29h 54m

Sydney Kingsford Smith

Wed 28/5

11:50-23:59

3 stops27h 09m

$2,016

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 10/3

15:48-09:00

2 stops25h 12m

Sydney Kingsford Smith

Fri 21/3

11:15-17:59

2 stops22h 44m

$2,110

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 4/3

10:55-07:00

1 stop27h 05m

Sydney Kingsford Smith

Tue 11/3

11:50-15:16

1 stop19h 26m

$2,128

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 22/3

06:50-07:45

2 stops32h 55m

Sydney Kingsford Smith

Sat 29/3

13:15-09:10

2 stops35h 55m

$2,449

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 21/3

06:15-09:00

1 stop34h 45m

Sydney Kingsford Smith

Sun 23/3

11:15-23:09

1 stop27h 54m

$3,338

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 7/5

15:43-19:00

3 stops36h 17m

Sydney Kingsford Smith

Sun 11/5

20:55-14:47

3 stops56h 52m

$4,001

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 3/3

11:57-06:55

3 stops49h 58m

Sydney Kingsford Smith

Mon 10/3

16:20-22:18

3 stops45h 58m

$5,900

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 12 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 32 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

To help decide which airline to fly from St. Louis to Sydney, see what other customers have to say about ANA, Fiji Airways and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

ANA

8.4

Very Good

836 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

ANA

8.4

Very Good

836 reviews

ANA

8.4

Very Good

836 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Fiji Airways

8.0

Very Good

184 reviews

ANA

8.4

Very Good

836 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Delta

8.0

Very Good

8,212 reviews

ANA

8.4

Very Good

836 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Air New Zealand

7.9

Good

460 reviews

ANA

8.4

Very Good

836 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

LATAM Airlines

7.5

Good

1,793 reviews

ANA

8.4

Very Good

836 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

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 $1,800 on this airline. Additional options worth looking into are Air New Zealand and Air Canada, starting at $1,836 and $1,957 round-trip. Fiji Airways is 26% cheaper than the average price of flights available within the next 90 days to this destination.
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

Terrigal

Bondi Beach

Lithgow

Leura

Swansea

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Alternative routes for St. Louis to Sydney

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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 $1,800

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. 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

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 21 February 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 21 February 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 14 February 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

To help decide which airline to fly from St. Louis to Sydney, see what other customers have to say about ANA, Fiji Airways and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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 21 February 2025.