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Cheap flights from Ontario to Louisville from C$ 334

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
12 Jun — 19 Jun1
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 13 May 2026.

Tue 15/92:48 p.m.
YOW
-
SDF
1 stop8h 09m
United Airlines
Wed 16/911:13 a.m.
SDF
-
YOW
1 stop5h 02m
United Airlines
Deal found 12/5C$ 486
Tue 15/911:15 a.m.
YOW
-
SDF
2 stops8h 47m
Air Canada
Wed 16/96:00 a.m.
SDF
-
YOW
1 stop3h 56m
Air Canada
Deal found 11/5C$ 564
Fri 26/65:50 p.m.
YOW
-
SDF
1 stop5h 04m
United Airlines
Fri 3/77:55 p.m.
SDF
-
YOW
2 stops17h 15m
United Airlines
Deal found 12/5C$ 573
Mon 8/67:30 p.m.
YOW
-
SDF
1 stop14h 53m
United Airlines
Mon 15/610:00 a.m.
SDF
-
YOW
1 stop13h 54m
United Airlines
Deal found 11/5C$ 607
Sun 2/84:45 p.m.
YYZ
-
SDF
2 stops27h 13m
Multiple Airlines
Fri 7/89:10 p.m.
SDF
-
YYZ
1 stop16h 55m
Multiple Airlines
Deal found 13/5C$ 611
Tue 26/57:55 a.m.
YYZ
-
SDF
1 stop5h 46m
Delta
Fri 29/55:30 p.m.
SDF
-
YYZ
1 stop6h 11m
Delta
Deal found 12/5C$ 632
Mon 16/119:35 a.m.
YYZ
-
SDF
1 stop8h 28m
Multiple Airlines
Thu 19/119:09 p.m.
SDF
-
YYZ
1 stop20h 06m
Multiple Airlines
Deal found 12/5C$ 651
Mon 1/61:30 p.m.
YYZ
-
SDF
2 stops43h 06m
Multiple Airlines
Fri 12/69:28 p.m.
SDF
-
YYZ
1 stop23h 12m
Multiple Airlines
Deal found 8/5C$ 652
Thu 25/65:15 p.m.
YYZ
-
SDF
1 stop6h 44m
United Airlines
Mon 29/610:05 a.m.
SDF
-
YYZ
1 stop4h 14m
United Airlines
Deal found 12/5C$ 653
Tue 28/710:15 a.m.
YYZ
-
SDF
1 stop6h 48m
United Airlines
Tue 28/77:55 p.m.
SDF
-
YYZ
1 stop4h 04m
United Airlines
Deal found 11/5C$ 670
Sat 25/77:00 a.m.
YYZ
-
SDF
1 stop10h 03m
United Airlines
Wed 29/75:50 p.m.
SDF
-
YYZ
1 stop6h 09m
United Airlines
Deal found 11/5C$ 678
Mon 1/66:30 p.m.
YYZ
-
SDF
1 stop5h 55m
Delta
Mon 8/64:40 p.m.
SDF
-
YYZ
1 stop5h 19m
Delta
Deal found 8/5C$ 680

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 13 May 2026.

Round-trip from

C$ 486

One-way from

C$ 334

Popular in

June

Cheapest in

March

Average price

C$ 726
United Airlines
  • United Airlines
  • 15/9-16/9
  • 2 total stops
  • 13h 11m total
  • Ontario to Louisville
Search Deals
8/6
  • 8/6
  • 2 total stops
  • 43h 06m total
  • Ontario to Louisville
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 66 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 13 May 2026.
Use the filters below to find and compare flights from Ontario to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 15/9

2:48 p.m.-10:57 p.m.

1 stop8h 09m

Louisville Intl

Wed 16/9

11:13 a.m.-4:15 p.m.

1 stop5h 02m

C$ 486

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Fri 26/6

5:50 p.m.-10:54 p.m.

1 stop5h 04m

Louisville Intl

Fri 3/7

1:10 p.m.-10:05 p.m.

1 stop8h 55m

C$ 486

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 15/9

11:15 a.m.-8:02 p.m.

2 stops8h 47m

Louisville Intl

Wed 16/9

6:00 a.m.-9:56 a.m.

1 stop3h 56m

C$ 564

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sat 6/6

6:30 p.m.-11:59 p.m.

1 stop5h 29m

Louisville Intl

Mon 8/6

6:34 p.m.-11:58 p.m.

1 stop5h 24m

C$ 632

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Tue 26/5

7:55 a.m.-1:41 p.m.

1 stop5h 46m

Louisville Intl

Fri 29/5

5:30 p.m.-11:41 p.m.

1 stop6h 11m

C$ 632

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 11/6

9:00 p.m.-9:26 a.m.

1 stop12h 26m

Louisville Intl

Mon 15/6

7:47 p.m.-11:59 p.m.

1 stop4h 12m

C$ 632

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 28/5

2:45 p.m.-11:49 p.m.

1 stop9h 04m

Louisville Intl

Mon 1/6

7:47 p.m.-11:59 p.m.

1 stop4h 12m

C$ 632

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 29/5

1:00 p.m.-8:23 p.m.

1 stop7h 23m

Louisville Intl

Sun 31/5

7:52 p.m.-11:59 p.m.

1 stop4h 07m

C$ 632

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Mon 1/6

1:30 p.m.-8:36 a.m.

2 stops43h 06m

Louisville Intl

Fri 12/6

9:28 p.m.-8:40 p.m.

1 stop23h 12m

C$ 652

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Tue 25/8

1:00 p.m.-7:07 p.m.

1 stop6h 07m

Louisville Intl

Wed 26/8

5:15 a.m.-9:54 a.m.

1 stop4h 39m

C$ 670

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/5

Showing 1-10 of 45 resultsSorted by cheapest first
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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, May is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of C$ 184). Flying from Region of Ontario to Louisville in February is currently the most expensive (average of C$ 759). 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.

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?

    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 Delta can get you from Region of Ontario to Louisville in just under 5h 29m. Your travel time can differ by up to 3h 18m. The distance from Region of Ontario to Louisville is about 798 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, May is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of C$ 184). Flying from Region of Ontario to Louisville in February is currently the most expensive (average of C$ 759). 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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Pierre Elliott Trudeau Intl to Nashville flights
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Pierre Elliott Trudeau Intl to Lexington flights
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Grande Prairie to Nashville flights
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Pearson Intl to Knoxville flights
Pearson Intl to Blountville flights
Vancouver Intl to Lexington flights
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Vancouver Intl to Louisville flights
Halifax to Cincinnati flights
Victoria to Cincinnati flights
London to Nashville flights
Saskatoon to Cincinnati flights
Edmonton to Cincinnati flights
Ottawa to Louisville flights
Halifax to Knoxville flights
Calgary to Louisville flights
Fort St. John to Nashville flights
Vancouver Intl to Blountville flights
Windsor to Nashville flights
Québec City to Louisville flights
Charlottetown to Nashville flights
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Top 3 airlines flying from Ontario to Louisville

Discover the top 3 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 13 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 492AverageC$ 669FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 534AverageC$ 814FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 639AverageC$ 827FlexibilityNo cancel feeOn-time60%
Search WestJet 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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