HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Louisville

$176+ Cheap flights from Ontario to Louisville (SDF)

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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Louisville with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Louisville

Keep the following information in mind while searching for Ontario to Louisville flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$264
(Mytrip)

One-way from

$176
(Trip.com)

Popular in

October

Cheapest in

February

Average price

$613
Provider with most accurate pricing for Toronto (YTO)-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-Louisville Intl flights.
Search Deals
From Ontario to Louisville Intl
Search Deals
One-way flight from Ontario to Louisville Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Ontario to Louisville

Cheapest flights from Ontario to Louisville
Explore the most affordable flight options available from Ontario to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/28. 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 11/125:55 pmYOW - SDF
1 stop5h 59mUnited Airlines
Tue 11/188:30 amSDF - YOW
1 stop5h 02mUnited Airlines
Deal found 10/28$349
This United deal was found by Cheapflights users on 10/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:20 amYOW - SDF
1 stop6h 57mMultiple Airlines
Tue 11/186:45 amSDF - YOW
2 stops9h 33mMultiple Airlines
Deal found 10/28$401
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Thu 11/134:15 pmYOW - SDF
1 stop16h 49mMultiple Airlines
Mon 11/177:11 pmSDF - YOW
1 stop22h 14mMultiple Airlines
Deal found 10/28$407
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sun 11/237:40 amYYZ - SDF
1 stop24h 53mMultiple Airlines
Sat 11/293:42 pmSDF - YYZ
1 stop20h 01mMultiple Airlines
Deal found 10/30$437
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sun 12/148:00 amYUL - SDF
1 stop27h 00mMultiple Airlines
Sun 12/212:55 pmSDF - YUL
2 stops33h 35mMultiple Airlines
Deal found 10/30$437
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Thu 11/207:00 amYYZ - SDF
1 stop10h 53mMultiple Airlines
Sun 11/238:31 pmSDF - YYZ
2 stops27h 40mMultiple Airlines
Deal found 10/28$441
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:58 amYYZ - SDF
1 stop10h 40mAmerican Airlines
Sun 12/146:08 amSDF - YYZ
1 stop10h 27mAmerican Airlines
Deal found 10/29$470
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Mon 11/247:35 amYYZ - SDF
1 stop26h 55mMultiple Airlines
Sun 11/308:31 pmSDF - YYZ
2 stops27h 40mMultiple Airlines
Deal found 10/29$486
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 12/126:10 amYYZ - SDF
2 stops10h 13mMultiple Airlines
Sun 12/1411:55 amSDF - YYZ
1 stop11h 25mMultiple Airlines
Deal found 10/29$497
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:30 amYUL - SDF
2 stops12h 34mAmerican Airlines
Sat 12/207:24 pmSDF - YUL
1 stop18h 22mAmerican Airlines
Deal found 10/28$536
This Delta deal was found by Cheapflights users on 10/28. 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.
Fri 12/125:40 amYOW - SDF
2 stops11h 56mDelta
Fri 12/1911:42 amSDF - YOW
2 stops13h 00mDelta
Deal found 10/28$539
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/132:15 pmYYZ - SDF
1 stop8h 14mUnited Airlines
Sat 12/2010:50 amSDF - YYZ
1 stop12h 04mUnited Airlines
Deal found 10/29$541

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Louisville 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 October 30, 2025.
Use the filters below to find and compare flights from Ontario to Louisville that are best for you.

Fly from

Ontario

Fly to

Louisville

Route

Depart

Return

Price

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 1/8

7:10 am-3:49 pm

1 stop8h 39m

Louisville Intl

Mon 1/12

6:00 am-2:20 pm

1 stop8h 20m

$264

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 2/24

2:15 pm-7:42 pm

1 stop5h 27m

Louisville Intl

Wed 2/25

9:00 am-9:18 pm

1 stop12h 18m

$301

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 2/24

2:50 pm-10:13 pm

2 stops7h 23m

Louisville Intl

Wed 2/25

6:15 am-4:18 pm

2 stops10h 03m

$354

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Wed 2/25

8:15 am-10:13 pm

1 stop13h 58m

Louisville Intl

Thu 2/26

5:35 am-4:39 pm

1 stop11h 04m

$365

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 11/20

7:00 am-5:53 pm

1 stop10h 53m

Louisville Intl

Sun 11/23

8:31 pm-12:11 am

2 stops27h 40m

$441

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 12/12

10:58 am-9:38 pm

1 stop10h 40m

Louisville Intl

Sun 12/14

6:08 am-4:35 pm

1 stop10h 27m

$470

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sun 12/14

8:00 am-11:00 am

1 stop27h 00m

Louisville Intl

Sun 12/21

7:44 pm-2:54 pm

1 stop19h 10m

$473

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Mon 11/24

7:35 am-10:30 am

1 stop26h 55m

Louisville Intl

Sun 11/30

8:31 pm-12:11 am

2 stops27h 40m

$486

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sun 11/23

10:55 am-8:33 am

2 stops21h 38m

Louisville Intl

Sat 11/29

3:42 pm-11:43 am

1 stop20h 01m

$494

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Mon 3/30

9:25 am-8:14 pm

1 stop10h 49m

Louisville Intl

Wed 4/8

7:30 am-4:05 pm

1 stop8h 35m

$524

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 42 results
1
2
3
...
5

Best time to book a flight from Ontario to Louisville

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

What is the cheapest month to book a flight from Region of Ontario to Louisville?

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of $139). Flying from Region of Ontario to Louisville in August is currently the most expensive (average of $372). 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.

What is the cheapest time of day to fly from ON to SDF?

Find hourly flight availability from Ontario to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

When flying from Region of Ontario to Louisville, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 25% versus a flight in the morning.

How much does it cost to fly round-trip from Region of Ontario to Louisville?

Related info for your journey

Find useful and relevant information for your journey from Ontario to Louisville. 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 into for flights to Louisville from Ontario?

    Louisville Intl (SDF), located 5.3 mi from the city center, is the airport you fly into when you book flights from Ontario to Louisville.

  • How long is the flight from Region of Ontario to Louisville?

    A quick flight from Region of Ontario to Louisville can take about 5h 27m. United Airlines provides one of the quickest options available for as low as $301. There are 715 mi between Region of Ontario and Louisville. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Region of Ontario to Louisville one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $178. Users have also found prices from $204 and $210 on Air Canada and Delta, respectively.

  • What are the most popular routes from Region of Ontario to Louisville?

    When deciding which route to take from Region of Ontario to Louisville consider Montreal Pierre Elliott Trudeau Intl - Louisville Intl, Toronto Pearson Intl - Louisville Intl or Ottawa - Louisville Intl as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Louisville 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 Region of Ontario to Louisville?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of $139). Flying from Region of Ontario to Louisville in August is currently the most expensive (average of $372). 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

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

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 Ontario to Louisville

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Nashville flights
Pierre Elliott Trudeau Intl to Nashville flights
Pearson Intl to Cincinnati flights
Vancouver Intl to Nashville flights
Victoria to Lexington flights
Winnipeg to Nashville flights
Calgary to Nashville flights
Abbotsford to Nashville flights
Pierre Elliott Trudeau Intl to Cincinnati flights
Vancouver Intl to Cincinnati flights
Pearson Intl to Knoxville flights
Québec City to Nashville flights
Charlottetown to Nashville flights
Pierre Elliott Trudeau Intl to Louisville flights
Halifax to Nashville flights
Hamilton to Nashville flights
Pearson Intl to Lexington flights
Pearson Intl to Louisville flights
Edmonton to Nashville flights
Saskatoon to Nashville flights
Saskatoon to Cincinnati flights
Vancouver Intl to Louisville flights
Ottawa to Cincinnati flights
Ottawa to Louisville flights
Victoria to Nashville flights
Pierre Elliott Trudeau Intl to Lexington flights
Ottawa to Nashville flights
Calgary to Cincinnati flights
Vancouver Intl to Lexington flights
Regina to Nashville flights
Edmonton to Louisville flights
Québec City to Knoxville flights
Winnipeg to Louisville flights
Vancouver Intl to Paducah flights
London to Nashville flights
Pierre Elliott Trudeau Intl to Knoxville flights
Fredericton to Nashville flights
Halifax to Knoxville flights
Pearson Intl to Blountville flights
St. John's to Nashville flights
Victoria to Louisville flights
Calgary to Louisville flights
Yellowknife to Cincinnati flights
Victoria to Cincinnati flights

Top airline flying from Ontario to Louisville

Discover the top airline that operate flights from Ontario to Louisville. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$321Average$556FlexibilityNo cancel feeOn-time60%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.