SDF - SYD

$555 Find Cheap Flights from Louisville to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Sydney departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Sydney, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$1,140
Overall average: $1,342
United Airlines
Tue 6/9Wed 6/17
SDF - SYD • 2 stops
Cheapest one-way
$555
Delta
Sat 5/16
SDF - SYD • 2 stops
Top airlines
United Airlines
Cheapest • from $1,140 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
November
Cheapest • 16% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Louisville to Sydney (SDF-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Sydney

Tue, Jun 9 - Wed, Jun 17
United Airlines Logo
3:25 pm - 6:55 am
SDF
-
SYD
25h 30m
2 stops
United Airlines Logo
9:30 am - 7:16 pm
SYD
-
SDF
23h 46m
2 stops
$1,140United Airlines
Sat, Mar 14 - Fri, Mar 27
United Airlines Logo
1:58 pm - 7:00 am
SDF
-
SYD
26h 02m
2 stops
United Airlines Logo
11:50 am - 7:51 pm
SYD
-
SDF
23h 01m
1 stop
$1,277United Airlines
Tue, Jun 9 - Wed, Jun 17
United Airlines Logo
3:30 pm - 6:55 am
SDF
-
SYD
25h 25m
2 stops
United Airlines Logo
9:30 am - 8:14 pm
SYD
-
SDF
24h 44m
2 stops
$1,282United Airlines
Thu, Mar 19 - Sun, Apr 5
United Airlines Logo
3:30 pm - 8:05 am
SDF
-
SYD
25h 35m
2 stops
United Airlines Logo
10:20 am - 9:25 am
SYD
-
SDF
37h 05m
2 stops
$1,445United Airlines
Thu, Mar 19 - Sun, Apr 5
United Airlines Logo
3:15 pm - 8:05 am
SDF
-
SYD
25h 50m
2 stops
United Airlines Logo
10:20 am - 10:39 pm
SYD
-
SDF
50h 19m
2 stops
$1,446United Airlines
Wed, Mar 25 - Wed, Apr 1
United Airlines Logo
3:30 pm - 7:00 am
SDF
-
SYD
24h 30m
1 stop
United Airlines Logo
11:20 am - 2:31 pm
SYD
-
SDF
42h 11m
2 stops
$1,468United Airlines
Sun, Mar 29 - Sat, Apr 4
United Airlines Logo
9:00 am - 8:00 am
SDF
-
SYD
32h 00m
2 stops
United Airlines Logo
10:30 am - 10:39 pm
SYD
-
SDF
27h 09m
2 stops
$1,472United Airlines
Sun, Feb 22 - Wed, Feb 25
United Airlines Logo
3:30 pm - 9:05 am
SDF
-
SYD
25h 35m
2 stops
United Airlines Logo
12:10 pm - 10:37 pm
SYD
-
SDF
50h 27m
2 stops
$1,492United Airlines
Sun, Feb 22 - Wed, Feb 25
United Airlines Logo
3:30 pm - 7:00 am
SDF
-
SYD
23h 30m
1 stop
United Airlines Logo
11:50 am - 9:46 pm
SYD
-
SDF
25h 56m
1 stop
$1,503United Airlines
Thu, Mar 19 - Sun, Apr 5
United Airlines Logo
3:30 pm - 7:00 am
SDF
-
SYD
24h 30m
1 stop
United Airlines Logo
10:20 am - 10:39 pm
SYD
-
SDF
26h 19m
2 stops
$1,564United Airlines
Booking Insights

KAYAK's insights & trends for Louisville to Sydney flights

Get data-powered insights and trends into flights from Louisville to Sydney to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Louisville to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Louisville to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Louisville to Sydney is November, where tickets cost $1,228 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $1,792 and $1,775 respectively.

Good to know

Low seasonApril
Cheapest flight$555
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Louisville to Sydney

When to book flights from Louisville to Sydney

Are your dates flexible? Find out the best times to travel from Louisville to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Louisville to Sydney

  • What is the cheapest flight from Louisville to Sydney?

    In the last 3 days, the lowest price for a flight from Louisville to Sydney was $555 for a one-way ticket and $1,140 for a round-trip.

  • Do I need a passport to fly between Louisville and Sydney?

    Yes, you’ll need a passport to travel to Sydney from Louisville.

  • Which aircraft models fly most regularly from Louisville to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Louisville to Sydney?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Louisville and Sydney, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Louisville to Sydney, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Louisville to Sydney are Delta and United Airlines. With an average price for the route of $1,432 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,324 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Louisville to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Louisville to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Louisville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Louisville to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Louisville with another airline. Booking your flights between Louisville and SYD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Louisville to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Louisville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Louisville to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Louisville to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Louisville to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8180 reviews
7.8Entertainment
8.1Boarding
7.9Comfort
8.5Crew
7.2Food
Airline reviews

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

2.0 MediocreJaspreet, Feb 2026
SEA - SMF
Read more Delta reviews

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

This was one of the worst flights I’ve been on in years. I upgraded to comfort and had such an uncomfortable experience. The person next to me was oversized - which I understand - however, they took up their space and mine. I could only use about 50% of my seat space to not be physically touching this person the entire flight and there was no spatial awareness. I also could not use the seat outlet because their body was obstructing it. It was very inconvenient. Their body kept touching me repeatedly during the flight and I felt very uncomfortable. To pay more for an upgraded space and then not even being able to use it was highly disappointing.

No wheel chair as requested at Atlanta arrival on first flight.

Only freetext wifi was available in flight; browsing WiFi required payment. Since the seats had no in flight entertainment, Delta should revisit this policy on this longer flight.

Only water, tea or coffee served midflight, even to comfort seating. Man next to me needed two seats and took up a portion of my seat and Delta did nothing.

The flight was great as well as the airline staff

First class and monitors weren’t working for mine & my husbands. Eventually fixed, but quite annoyed as we bought first class. Also, No foot rests.

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

It was delayed but other than that it was great.

Got on the plane and sat there for an hour before departure.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Check-in and in-flight staff were better than average. The seat was a fair size but too hard and not enough padding. The cushion/pillow provided is poor (thin and seems to be disposable ,it provides no effective cushioning or support). Food was OK-ish but no choice of inflight snacks and no easy place to get drinks other than water (I could ask for juice by intruding into the staff area at the back of the plane) Entertainment was very good actually. Overall better than I expected from a US-based airline (sorry!) but compared to ANA or Singapore it was so-so. (I live in Japan so they are my comparative airlines)

Everything was on time Will use united again for sure

Plane outlets in my row not working to charge phone. Staff response was, well it should be. Plug into seed for volume not working well. Had to find the sweet spot for plug in or it would shut off and on.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Fine not above and beyond as I had a connection that was delayed due to maintenance

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

Same thing as flight from Pheonix to Newark. Uograded and Promised extra leg room and when I got to the seat it had none.

Everything you need to know for your flight from Louisville to Sydney

Information on your arrival and departure airports