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$647+ Cheap flights from Louisville (SDF) to Sydney (SYD)

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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SYD
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
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Cheap flight deals from Louisville to Sydney

Cheapest flights from Louisville to Sydney
Explore the most affordable flight options available from Louisville to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 24, 2026.

This United Airlines deal was found by Cheapflights users on 7/21. 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 11/107:00 am
SDF
-
SYD
1 stop32h 00m
United Airlines
Mon 11/239:20 am
SYD
-
SDF
1 stop19h 48m
United Airlines
Deal found 7/21$1,170
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Tue 12/13:50 pm
SDF
-
SYD
1 stop23h 10m
United Airlines
Tue 12/89:20 am
SYD
-
SDF
1 stop20h 13m
United Airlines
Deal found 7/23$1,171
This Delta deal was found by Cheapflights users on 7/19. 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 8/103:25 pm
SDF
-
SYD
2 stops25h 25m
Delta
Wed 8/199:15 am
SYD
-
SDF
2 stops23h 56m
Delta
Deal found 7/19$1,192
This Qantas Airways deal was found by Cheapflights users on 7/20. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:53 pm
SDF
-
SYD
2 stops24h 22m
Qantas Airways
Mon 9/2112:00 pm
SYD
-
SDF
1 stop23h 43m
Qantas Airways
Deal found 7/20$1,210
This oojo deal was found by Cheapflights users on 7/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:00 pm
SDF
-
SYD
1 stop21h 55m
Qantas Airways
Sat 9/57:25 am
SYD
-
SDF
2 stops28h 52m
Qantas Airways
Deal found 7/20$1,215
This oojo deal was found by Cheapflights users on 7/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:03 pm
SDF
-
SYD
2 stops49h 27m
Qantas Airways
Fri 9/412:00 pm
SYD
-
SDF
1 stop19h 23m
Qantas Airways
Deal found 7/20$1,223
This United Airlines deal was found by Cheapflights users on 7/21. 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.
Sat 9/55:45 pm
SDF
-
SYD
2 stops47h 15m
United Airlines
Sat 9/129:30 am
SYD
-
SDF
2 stops50h 59m
United Airlines
Deal found 7/21$1,248
This United Airlines deal was found by Cheapflights users on 7/21. 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 8/203:35 pm
SDF
-
SYD
2 stops25h 20m
United Airlines
Thu 8/2710:20 am
SYD
-
SDF
2 stops26h 11m
United Airlines
Deal found 7/21$1,274
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Thu 7/307:15 am
SDF
-
SYD
2 stops33h 45m
United Airlines
Thu 8/69:30 am
SYD
-
SDF
2 stops28h 29m
United Airlines
Deal found 7/22$1,275
This Ovago deal was found by Cheapflights users on 7/20. 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.
Mon 9/75:53 pm
SDF
-
SYD
2 stops24h 57m
Qantas Airways
Sun 9/2012:00 pm
SYD
-
SDF
1 stop19h 19m
Qantas Airways
Deal found 7/20$1,285

Find flight deals from Louisville to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Sydney (SYD). 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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,170
(United Airlines)

One-way from

$647
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$1,595
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 Sydney Kingsford Smith
Search Deals
One-way flight from Louisville Intl to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($115 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Sydney 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 July 24, 2026.
Use the filters below to find and compare flights from Louisville to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Tue 12/1

3:50 pm-7:00 am

1 stop23h 10m

Sydney Kingsford Smith

Tue 12/8

9:20 am-1:33 pm

1 stop20h 13m

$1,170

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Fri 8/21

10:23 am-7:00 am

2 stops30h 37m

Sydney Kingsford Smith

Fri 9/4

10:20 am-10:31 pm

2 stops26h 11m

$1,292

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Tue 11/10

7:00 am-7:00 am

1 stop32h 00m

Sydney Kingsford Smith

Mon 11/23

9:20 am-1:08 pm

1 stop19h 48m

$1,307

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Mon 11/9

3:35 pm-7:00 am

1 stop23h 25m

Sydney Kingsford Smith

Mon 11/23

9:20 am-7:56 pm

1 stop26h 36m

$1,307

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Mon 11/9

6:24 pm-9:20 am

2 stops46h 56m

Sydney Kingsford Smith

Mon 11/23

4:45 pm-5:39 pm

2 stops40h 54m

$1,309
Cheapest one-way

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Sat 8/15

3:25 pm-7:00 am

2 stops49h 35m

$647
Quickest one-way

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Sat 8/15

4:01 pm-6:55 am

1 stop24h 54m

$741

LouisvilleSydney

SDF - SYD

SDFSYD

Louisville Intl

Sat 8/15

4:01 pm-9:45 am

3 stops27h 44m

$754

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Sorted by cheapest first

Compare providers for flights from Louisville to Sydney

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 Louisville to Sydney in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
BusinessClassPrice Accuracy-Trust 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 Louisville-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub 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 Louisville-Sydney 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 Louisville to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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 Sydney

How much does it cost to fly round-trip from Louisville to Sydney?

Airfare is below average for this route at the moment.

Louisville to Sydney flights typically cost between $1,278 and $1,472 in November.
The cheapest round-trip price found within the last 5 days was $1,170 on United Airlines (Nov 10-Nov 23).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated July 24, 2026.
See what other customers who have flown with Delta and United Airlines from Louisville to Sydney have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,479 reviews

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,479 reviews
Delta
7.8
Good
8,479 reviews

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
10,024 reviews
Delta
7.8
Good
8,479 reviews

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

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

  • How long is the flight from Louisville to Sydney?

    Departing from Louisville to Sydney will take you 23h 10m. Louisville and Sydney are separated by a distance of 9288 mi.

  • What are the cheapest airlines flying from Louisville to Sydney round-trip?

    Cheapflights users have booked flights from Louisville to Sydney round-trip from $662. Another airline that can offer you cheap pricing is United Airlines. Delta is currently priced 52% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Louisville 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.

See more FAQs

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Coogee
Manly

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Louisville to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Sydney flights
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Knoxville to Sydney flights

Top 2 airlines flying from Louisville to Sydney

Discover the top 2 airlines that operate flights from Louisville to Sydney. 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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$662Average$1,351FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,212Average$1,453FlexibilityNo cancel feeOn-time69%

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