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$574+ Cheap flights from Louisville (SDF) to Australia

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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SYD
Apr 24 — May 11
Fri 4/24
Fri 5/1
1 adult, Economy
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Cheap flight deals from Louisville to Australia

Cheapest flights from Louisville to Australia
Explore the most affordable flight options available from Louisville to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.

This United Airlines deal was found by Cheapflights users on 3/23. 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.
Wed 6/109:30 am
SDF
-
SYD
2 stops31h 25m
United Airlines
Wed 6/179:30 am
SYD
-
SDF
2 stops26h 45m
United Airlines
Deal found 3/23$1,233
This Delta deal was found by Cheapflights users on 3/22. 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.
Tue 6/238:11 am
SDF
-
SYD
2 stops32h 39m
Delta
Tue 7/79:15 am
SYD
-
SDF
2 stops23h 58m
Delta
Deal found 3/22$1,313
This Delta deal was found by Cheapflights users on 3/22. 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 3/2310:13 am
SDF
-
SYD
2 stops30h 12m
Delta
Thu 3/261:15 pm
SYD
-
SDF
2 stops35h 13m
Delta
Deal found 3/22$1,321
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Thu 5/73:37 pm
SDF
-
SYD
2 stops25h 18m
United Airlines
Thu 5/149:30 am
SYD
-
SDF
2 stops24h 47m
United Airlines
Deal found 3/23$1,333
This Delta deal was found by Cheapflights users on 3/22. 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.
Thu 6/257:05 am
SDF
-
SYD
2 stops33h 45m
Delta
Tue 7/79:15 am
SYD
-
SDF
2 stops23h 58m
Delta
Deal found 3/22$1,371
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Thu 5/77:15 am
SDF
-
MEL
2 stops35h 00m
United Airlines
Thu 5/1410:55 am
MEL
-
SDF
2 stops23h 22m
United Airlines
Deal found 3/23$1,385
This Delta deal was found by Cheapflights users on 3/22. 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.
Wed 6/247:51 pm
SDF
-
SYD
2 stops44h 59m
Delta
Tue 7/79:15 am
SYD
-
SDF
2 stops23h 58m
Delta
Deal found 3/22$1,389
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Wed 6/243:41 pm
SDF
-
MEL
2 stops25h 49m
United Airlines
Wed 7/89:30 am
MEL
-
SDF
2 stops24h 31m
United Airlines
Deal found 3/23$1,405
This Kiwi.com deal was found by Cheapflights users on 3/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:21 am
SDF
-
SYD
1 stop32h 09m
Multiple Airlines
Fri 5/295:50 pm
SYD
-
SDF
1 stop39h 36m
Multiple Airlines
Deal found 3/22$1,411
This United Airlines deal was found by Cheapflights users on 3/22. 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.
Tue 6/238:00 am
SDF
-
SYD
3 stops33h 00m
United Airlines
Tue 7/79:30 am
SYD
-
SDF
2 stops24h 31m
United Airlines
Deal found 3/22$1,413
This United Airlines deal was found by Cheapflights users on 3/22. 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.
Wed 5/63:37 pm
SDF
-
MEL
2 stops25h 53m
United Airlines
Sun 5/109:30 am
MEL
-
SDF
2 stops24h 47m
United Airlines
Deal found 3/22$1,413
This Delta deal was found by Cheapflights users on 3/22. 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.
Thu 6/257:49 am
SDF
-
SYD
2 stops33h 01m
Delta
Sun 7/59:15 am
SYD
-
SDF
2 stops37h 42m
Delta
Deal found 3/22$1,417

Find flight deals from Louisville to Australia

Keep the following information in mind while searching for Louisville to Australia flight deals. Data was last updated March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,233
(United Airlines)

One-way from

$574
(Delta)

Popular in

March

Cheapest in

November

Average price

$2,055
Provider with most accurate pricing for Louisville Intl-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Sydney Kingsford Smith flights.
Search Deals
From Louisville Intl to Australia
Search Deals
One-way flight from Louisville Intl to Australia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($201 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($51 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Australia 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 March 25, 2026.
Use the filters below to find and compare flights from Louisville to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Wed 6/10

3:25 pm-7:00 am

2 stops25h 35m

Sydney Kingsford Smith

Wed 6/17

10:20 am-8:23 pm

2 stops24h 03m

$1,233

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Tue 6/9

2:05 pm-7:00 am

2 stops26h 55m

Sydney Kingsford Smith

Wed 6/17

9:30 am-8:23 pm

2 stops24h 53m

$1,233

LouisvilleMelbourne

SDF - MEL

SDFMEL

Louisville Intl

Wed 5/6

3:37 pm-7:30 am

2 stops25h 53m

Melbourne

Sun 5/10

9:30 am-8:17 pm

2 stops24h 47m

$1,413

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Thu 8/27

3:41 pm-6:55 am

2 stops25h 14m

Sydney Kingsford Smith

Wed 9/2

9:30 am-8:36 pm

2 stops25h 06m

$1,421

LouisvilleMelbourne

SDF - MEL

SDFMEL

Louisville Intl

Mon 5/18

9:15 am-7:30 am

2 stops32h 15m

Melbourne

Mon 5/25

10:55 am-8:23 pm

2 stops23h 28m

$1,472
Quickest round-trip

LouisvilleMelbourne

SDF - MEL

SDFMEL

Louisville Intl

Wed 6/24

3:52 pm-5:00 am

1 stop23h 08m

Melbourne

Wed 7/8

1:35 pm-11:16 pm

1 stop23h 41m

$1,790

LouisvilleMelbourne

SDF - MEL

SDFMEL

Louisville Intl

Wed 6/24

3:52 pm-6:45 am

2 stops24h 53m

Melbourne

Wed 7/8

1:35 pm-11:16 pm

1 stop23h 41m

$1,794

LouisvilleMelbourne

SDF - MEL

SDFMEL

Louisville Intl

Wed 6/24

8:00 am-6:45 am

3 stops32h 45m

Melbourne

Wed 7/8

8:15 am-5:30 pm

2 stops23h 15m

$1,820

LouisvilleMelbourne

SDF - AVV

SDFAVV

Louisville Intl

Wed 6/24

7:45 pm-4:05 pm

2 stops30h 20m

Melbourne Avalon

Wed 7/8

6:00 am-11:16 pm

2 stops31h 16m

$2,041

LouisvilleMelbourne

SDF - AVV

SDFAVV

Louisville Intl

Thu 5/21

7:45 pm-2:10 pm

2 stops28h 25m

Melbourne Avalon

Fri 5/29

6:00 am-5:32 pm

2 stops25h 32m

$2,706

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Louisville to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Louisville 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 Louisville to Australia

What is the cheapest month to book a flight from Louisville to Australia?

Currently, October is the cheapest month in which you can book a flight from Louisville to Australia (average of $378). Flying from Louisville to Australia in April is currently the most expensive (average of $1,055). 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.

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. 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 Australia. Reviews last updated March 25, 2026.
Read through reviews of airlines operating flights from Louisville to Australia, such as Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,327 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,327 reviews
Delta
7.9
Good
8,327 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,477 reviews
Delta
7.9
Good
8,327 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

  • What airport do you fly from for flights from Louisville to Australia?

    Louisville Intl (SDF) is the airport you will fly out of if you book a flight from Louisville to Australia. It is only a 5.3 mi journey to Louisville Intl (SDF) from Louisville’s city center.

  • How long is the flight from Louisville to Australia?

    United Airlines and Qantas Airways can get you from Louisville to Australia in just under 25h 35m. Your travel time can differ by up to 4h 45m. Louisville and Australia are separated by a distance of 9288 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Louisville to Australia?

    Most travelers choose Louisville Intl - Melbourne, Louisville Intl - Sydney Kingsford Smith or Louisville Intl - Melbourne Avalon when deciding on the best route from Louisville to Australia.

  • Can I find deals for flights from Louisville to Australia that include hotel bookings?

    Yes. In addition to deals on Louisville to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Australia?

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

  • Can I find deals for business class flights from Louisville to Australia?

    Yes. Cheapflights offers flight deals from Louisville to Australia 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 Louisville to Australia?

    Currently, October is the cheapest month in which you can book a flight from Louisville to Australia (average of $378). Flying from Louisville to Australia in April is currently the most expensive (average of $1,055). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Louisville to Australia

Discover the top 2 airlines that operate flights from Louisville to Australia. 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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$973Average$1,484FlexibilityNo cancel feeOn-time69%
DeltaCheapest$985Average$1,351FlexibilityNo cancel feeOn-timeN/A

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