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$197+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
Mar 2 — Mar 91
Mon 3/2
Mon 3/9
1 adult, Economy
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Cheap 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 January 31, 2026.

This United Airlines deal was found by Cheapflights users on 1/31. 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 4/410:00 am
YOW
-
SDF
1 stop4h 47m
United Airlines
Wed 4/89:07 am
SDF
-
YOW
1 stop4h 52m
United Airlines
Deal found 1/31$321
This United Airlines deal was found by Cheapflights users on 1/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/156:00 am
YOW
-
SDF
1 stop4h 17m
United Airlines
Thu 6/186:00 am
SDF
-
YOW
1 stop4h 03m
United Airlines
Deal found 1/30$348
This United Airlines deal was found by Cheapflights users on 1/31. 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 2/129:45 am
YOW
-
SDF
1 stop5h 02m
United Airlines
Wed 2/189:50 am
SDF
-
YOW
1 stop14h 04m
United Airlines
Deal found 1/31$383
This Air Canada deal was found by Cheapflights users on 1/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/49:15 am
YOW
-
SDF
2 stops11h 01m
Air Canada
Wed 4/89:55 am
SDF
-
YOW
2 stops7h 19m
Air Canada
Deal found 1/31$392
This Mytrip deal was found by Cheapflights users on 1/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:00 pm
YYZ
-
SDF
2 stops20h 38m
Multiple Airlines
Mon 3/91:19 pm
SDF
-
YYZ
1 stop11h 10m
Multiple Airlines
Deal found 1/31$394
This United Airlines deal was found by Cheapflights users on 1/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:42 pm
YOW
-
SDF
1 stop14h 35m
United Airlines
Wed 6/175:35 am
SDF
-
YOW
2 stops7h 35m
United Airlines
Deal found 1/30$411
This American Airlines deal was found by Cheapflights users on 1/31. 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.
Tue 3/1710:58 am
YYZ
-
SDF
1 stop10h 41m
American Airlines
Tue 3/246:00 am
SDF
-
YYZ
1 stop10h 41m
American Airlines
Deal found 1/31$437
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Tue 3/177:10 am
YYZ
-
SDF
1 stop28h 04m
Multiple Airlines
Tue 3/2412:42 pm
SDF
-
YYZ
2 stops22h 53m
Multiple Airlines
Deal found 1/31$439
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Tue 3/176:45 am
YOW
-
SDF
2 stops10h 33m
American Airlines
Sun 3/227:38 am
SDF
-
YOW
2 stops9h 10m
American Airlines
Deal found 1/29$450
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Thu 3/51:10 pm
YYZ
-
SDF
1 stop4h 11m
American Airlines
Mon 3/96:00 am
SDF
-
YYZ
1 stop10h 41m
American Airlines
Deal found 1/29$464
This Kiwi.com deal was found by Cheapflights users on 1/29. 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.
Tue 3/174:20 pm
YOW
-
SDF
1 stop18h 48m
Multiple Airlines
Sun 3/223:33 pm
SDF
-
YOW
2 stops25h 52m
Multiple Airlines
Deal found 1/29$474
This United Airlines deal was found by Cheapflights users on 1/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/512:05 pm
YYZ
-
SDF
1 stop8h 09m
United Airlines
Mon 3/99:00 am
SDF
-
YYZ
1 stop7h 39m
United Airlines
Deal found 1/30$475

Find flight deals from Ontario to Louisville

Keep the following information in mind while searching for Ontario to Louisville flight deals. Data was last updated January 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$321
(United Airlines)

One-way from

$197
(Trip.com)

Popular in

October

Cheapest in

February

Average price

$559
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. 24% potential increase in price ($152 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 31, 2026.
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

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Sat 4/4

10:00 am-2:47 pm

1 stop4h 47m

Louisville Intl

Wed 4/8

9:07 am-1:59 pm

1 stop4h 52m

$321

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 6/15

6:00 am-10:17 am

1 stop4h 17m

Louisville Intl

Thu 6/18

6:00 am-10:03 am

1 stop4h 03m

$348

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Thu 2/12

9:45 am-2:47 pm

1 stop5h 02m

Louisville Intl

Wed 2/18

9:50 am-11:54 pm

1 stop14h 04m

$383

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Sat 4/4

9:15 am-8:16 pm

2 stops11h 01m

Louisville Intl

Wed 4/8

9:55 am-5:14 pm

2 stops7h 19m

$392

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Mon 3/2

6:00 pm-2:38 pm

2 stops20h 38m

Louisville Intl

Mon 3/9

1:19 pm-12:29 am

1 stop11h 10m

$394

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 6/15

7:42 pm-10:17 am

1 stop14h 35m

Louisville Intl

Wed 6/17

5:35 am-1:10 pm

2 stops7h 35m

$411

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Tue 3/17

10:58 am-9:39 pm

1 stop10h 41m

Louisville Intl

Tue 3/24

6:00 am-4:41 pm

1 stop10h 41m

$437

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Tue 3/17

7:10 am-11:14 am

1 stop28h 04m

Louisville Intl

Tue 3/24

12:42 pm-11:35 am

2 stops22h 53m

$439

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 3/17

6:45 am-5:18 pm

2 stops10h 33m

Louisville Intl

Sun 3/22

7:38 am-4:48 pm

2 stops9h 10m

$450

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 3/17

4:20 pm-11:08 am

1 stop18h 48m

Louisville Intl

Sun 3/22

3:33 pm-5:25 pm

2 stops25h 52m

$474

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Showing 1-10 of 47 results
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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 October is currently the most expensive (average of $426). 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.

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 4h 47m. United Airlines provides one of the quickest options available for as low as $321. 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 most popular routes from Region of Ontario to Louisville?

    When deciding which route to take from Region of Ontario to Louisville consider Toronto Pearson Intl - Louisville Intl, Montreal Pierre Elliott Trudeau 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 October is currently the most expensive (average of $426). 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

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Alternative routes for Ontario to Louisville

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$296Average$468FlexibilityNo cancel feeOn-time69%

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