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Cheap flights from Ontario to Louisville from C$ 316

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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Louisville

Enter your travel dates to find the best prices.

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 29 January 2026.

Sat 4/410:00 a.m.
YOW
-
SDF
1 stop4h 47m
United Airlines
Wed 8/47:20 a.m.
SDF
-
YOW
1 stop6h 39m
United Airlines
Deal found 27/1C$ 433
Wed 1/41:10 p.m.
YYZ
-
SDF
1 stop8h 16m
American Airlines
Wed 8/412:15 p.m.
SDF
-
YYZ
1 stop11h 14m
American Airlines
Deal found 28/1C$ 525
Sat 4/49:15 a.m.
YOW
-
SDF
2 stops11h 01m
Air Canada
Wed 8/49:07 a.m.
SDF
-
YOW
2 stops10h 27m
Air Canada
Deal found 27/1C$ 528
Wed 1/48:50 a.m.
YYZ
-
SDF
1 stop7h 51m
United Airlines
Wed 8/47:20 a.m.
SDF
-
YYZ
2 stops11h 42m
United Airlines
Deal found 28/1C$ 585
Mon 2/25:55 p.m.
YOW
-
SDF
1 stop5h 28m
United Airlines
Tue 3/28:29 a.m.
SDF
-
YOW
1 stop8h 43m
United Airlines
Deal found 26/1C$ 600
Thu 5/310:59 a.m.
YYZ
-
SDF
1 stop10h 40m
American Airlines
Mon 9/36:00 a.m.
SDF
-
YYZ
1 stop10h 41m
American Airlines
Deal found 28/1C$ 605
Wed 25/21:10 p.m.
YUL
-
SDF
1 stop9h 03m
United Airlines
Sat 7/39:00 a.m.
SDF
-
YUL
1 stop5h 00m
United Airlines
Deal found 28/1C$ 660
Tue 24/36:45 a.m.
YUL
-
SDF
2 stops28h 23m
Multiple Airlines
Fri 27/312:03 p.m.
SDF
-
YUL
1 stop12h 27m
Multiple Airlines
Deal found 28/1C$ 662
Thu 12/32:26 p.m.
YYZ
-
SDF
1 stop6h 16m
Delta
Sun 15/36:00 a.m.
SDF
-
YYZ
1 stop5h 06m
Delta
Deal found 28/1C$ 675
Mon 2/23:10 p.m.
YOW
-
SDF
1 stop8h 13m
Air Canada
Tue 3/26:28 a.m.
SDF
-
YOW
2 stops7h 39m
Air Canada
Deal found 26/1C$ 677
Sun 15/36:40 p.m.
YYZ
-
SDF
1 stop27h 33m
United Airlines
Sun 22/35:45 p.m.
SDF
-
YYZ
1 stop22h 54m
United Airlines
Deal found 28/1C$ 686
Fri 15/53:14 p.m.
YYZ
-
SDF
1 stop6h 14m
American Airlines
Mon 18/56:00 a.m.
SDF
-
YYZ
1 stop6h 31m
American Airlines
Deal found 27/1C$ 687

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 29 January 2026.

Round-trip from

C$ 433

One-way from

C$ 316

Popular in

October

Cheapest in

February

Average price

C$ 759
United Airlines
  • United Airlines
  • 4/4-8/4
  • 2 total stops
  • 11h 26m total
  • Ontario to Louisville
Search Deals
American Airlines
  • American Airlines
  • 2/5
  • 1 total stop
  • 8h 58m total
  • Ontario to Louisville
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 279 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (C$ 68 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 629,999 searches. Data last updated 29 January 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 a.m.-2:47 p.m.

1 stop4h 47m

Louisville Intl

Wed 8/4

7:20 a.m.-1:59 p.m.

1 stop6h 39m

C$ 433

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Sat 4/4

9:15 a.m.-8:16 p.m.

2 stops11h 01m

Louisville Intl

Wed 8/4

9:07 a.m.-7:34 p.m.

2 stops10h 27m

C$ 528

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Wed 1/4

8:50 a.m.-4:41 p.m.

1 stop7h 51m

Louisville Intl

Wed 8/4

7:20 a.m.-7:02 p.m.

2 stops11h 42m

C$ 585

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 5/3

10:59 a.m.-9:39 p.m.

1 stop10h 40m

Louisville Intl

Mon 9/3

6:00 a.m.-4:41 p.m.

1 stop10h 41m

C$ 605

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Wed 25/2

1:10 p.m.-10:13 p.m.

1 stop9h 03m

Louisville Intl

Sat 7/3

9:00 a.m.-2:00 p.m.

1 stop5h 00m

C$ 660

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 12/3

10:58 a.m.-9:39 p.m.

1 stop10h 41m

Louisville Intl

Sun 15/3

7:36 a.m.-4:03 p.m.

1 stop8h 27m

C$ 672

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 15/5

6:00 p.m.-11:59 p.m.

1 stop5h 59m

Louisville Intl

Mon 18/5

7:20 a.m.-1:25 p.m.

1 stop6h 05m

C$ 675

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 12/3

2:26 p.m.-8:42 p.m.

1 stop6h 16m

Louisville Intl

Sun 15/3

6:00 a.m.-11:06 a.m.

1 stop5h 06m

C$ 675

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sun 15/3

6:40 p.m.-10:13 p.m.

1 stop27h 33m

Louisville Intl

Sun 22/3

5:45 p.m.-4:39 p.m.

1 stop22h 54m

C$ 686

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 15/5

3:14 p.m.-9:28 p.m.

1 stop6h 14m

Louisville Intl

Mon 18/5

6:00 a.m.-12:31 p.m.

1 stop6h 31m

C$ 687

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

Showing 1-10 of 37 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 C$ 189). Flying from Region of Ontario to Louisville in October is currently the most expensive (average of C$ 578). 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?

    Located just 8.5 km from the city centre, Louisville Intl (SDF) is the airport most travelers will use when flying to Louisville from Ontario.

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

    United Airlines, Air Canada, and American Airlines can get you from Region of Ontario to Louisville in just under 4h 47m. Your travel time can differ by up to 6h 14m. The distance from Region of Ontario to Louisville is about 1151 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The most popular route from Region of Ontario to Louisville is Toronto Pearson Intl - Louisville Intl. You may also consider Montreal Pierre Elliott Trudeau Intl - Louisville Intl or Ottawa - Louisville Intl.

  • 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 C$ 189). Flying from Region of Ontario to Louisville in October is currently the most expensive (average of C$ 578). 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

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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 4 airlines flying from Ontario to Louisville

Discover the top 4 airlines 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 629,999 searches. Data last updated 29 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 189AverageC$ 601FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 391AverageC$ 721FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 438AverageC$ 688FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 564AverageC$ 843FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Louisville?

Cheapflights helps you search for flights from Ontario to Louisville via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Louisville?

Millions of users choose and trust Cheapflights to book the best flight deals from Ontario to Louisville for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ontario to Louisville with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Louisville flexibly with Cheapflights today.

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Not ready to book yet? You can track prices for flights from Ontario to Louisville on Cheapflights with our Price Alert feature and get notified when better prices are available.

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