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Cheap flights from Ontario to Louisville from C$ 258

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
10 Sep — 17 Sep1
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 11 August 2026.

Thu 19/1110:40 a.m. -
1 stop9h 49m
Mon 23/114:07 p.m. -
1 stop25h 33m
Deal found 8/8C$ 515
Tue 15/99:30 a.m. -
1 stop7h 40m
Tue 22/95:50 p.m. -
1 stop5h 37m
Deal found 6/8C$ 542
Sat 31/1011:38 a.m. -
1 stop5h 16m
Tue 3/112:50 p.m. -
1 stop6h 27m
Deal found 6/8C$ 545
Sat 5/92:29 p.m. -
1 stop5h 27m
Wed 16/97:55 a.m. -
1 stop8h 24m
Deal found 8/8C$ 545
Sat 5/94:16 p.m. -
1 stop5h 43m
Sat 12/96:20 a.m. -
1 stop4h 53m
Deal found 11/8C$ 547
Sat 5/911:40 a.m. -
1 stop8h 02m
Sat 12/96:00 p.m. -
1 stop5h 59m
Deal found 10/8C$ 548
Tue 8/129:40 a.m. -
1 stop7h 16m
Sat 12/127:50 a.m. -
1 stop8h 08m
Deal found 10/8C$ 556
Thu 8/1011:38 a.m. -
1 stop8h 57m
Tue 13/101:59 p.m. -
1 stop8h 00m
Deal found 6/8C$ 561
Sat 7/116:00 a.m. -
1 stop3h 57m
Sun 8/115:38 p.m. -
1 stop5h 18m
Deal found 7/8C$ 562
Fri 16/106:50 p.m. -
1 stop5h 09m
Mon 19/107:05 a.m. -
1 stop10h 33m
Deal found 8/8C$ 562
Sat 5/97:45 a.m. -
1 stop6h 33m
Mon 14/95:59 p.m. -
1 stop5h 40m
Deal found 8/8C$ 563
Fri 16/107:00 a.m. -
1 stop12h 10m
Sun 18/103:26 p.m. -
1 stop8h 33m
Deal found 9/8C$ 563

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 11 August 2026.

Round-trip from

C$ 515

One-way from

C$ 258

Popular in

October

Cheapest in

May

Average price

C$ 821
19/11-23/11
  • 19/11-23/11
  • 2 total stops
  • 35h 22m total
  • Ontario to Louisville
Search Deals
5/9
  • 5/9
  • 2 total stops
  • 21h 02m total
  • Ontario to Louisville
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 11 August 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

MontrealLouisville

YUL Montreal Pierre Elliott Trudeau Intl - SDF Louisville Intl

YULSDF

Montreal Pierre Elliott Trudeau Intl

Tue 15/9

9:30 a.m.-5:10 p.m.

1 stop7h 40m

Louisville Intl

Tue 22/9

5:50 p.m.-11:27 p.m.

1 stop5h 37m

C$ 542

MontrealLouisville

YUL Montreal Pierre Elliott Trudeau Intl - SDF Louisville Intl

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sat 5/9

2:29 p.m.-7:56 p.m.

1 stop5h 27m

Louisville Intl

Sat 12/9

5:30 p.m.-11:27 p.m.

1 stop5h 57m

C$ 545

MontrealLouisville

YUL Montreal Pierre Elliott Trudeau Intl - SDF Louisville Intl

YULSDF

Montreal Pierre Elliott Trudeau Intl

Tue 12/1

12:45 p.m.-5:40 p.m.

1 stop4h 55m

Louisville Intl

Wed 13/1

6:26 p.m.-11:10 p.m.

1 stop4h 44m

C$ 545

TorontoLouisville

YYZ Toronto Pearson Intl - SDF Louisville Intl

YYZSDF

Toronto Pearson Intl

Sat 5/9

4:16 p.m.-9:59 p.m.

1 stop5h 43m

Louisville Intl

Sat 12/9

6:20 a.m.-11:13 a.m.

1 stop4h 53m

C$ 547

MontrealLouisville

YUL Montreal Pierre Elliott Trudeau Intl - SDF Louisville Intl

YULSDF

Montreal Pierre Elliott Trudeau Intl

Tue 15/9

5:34 p.m.-10:33 p.m.

1 stop4h 59m

Louisville Intl

Tue 22/9

4:48 p.m.-9:42 p.m.

1 stop4h 54m

C$ 547

TorontoLouisville

YYZ Toronto Pearson Intl - SDF Louisville Intl

YYZSDF

Toronto Pearson Intl

Sat 31/10

11:38 a.m.-4:54 p.m.

1 stop5h 16m

Louisville Intl

Tue 3/11

2:50 p.m.-9:17 p.m.

1 stop6h 27m

C$ 547

TorontoLouisville

YYZ Toronto Pearson Intl - SDF Louisville Intl

YYZSDF

Toronto Pearson Intl

Tue 8/9

1:34 p.m.-7:30 p.m.

1 stop5h 56m

Louisville Intl

Sat 19/9

8:09 a.m.-5:19 p.m.

1 stop9h 10m

C$ 548

TorontoLouisville

YYZ Toronto Pearson Intl - SDF Louisville Intl

YYZSDF

Toronto Pearson Intl

Sat 5/9

11:40 a.m.-7:42 p.m.

1 stop8h 02m

Louisville Intl

Sat 12/9

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

1 stop5h 59m

C$ 548

MontrealLouisville

YUL Montreal Pierre Elliott Trudeau Intl - SDF Louisville Intl

YULSDF

Montreal Pierre Elliott Trudeau Intl

Tue 8/12

9:40 a.m.-4:56 p.m.

1 stop7h 16m

Louisville Intl

Sat 12/12

7:50 a.m.-3:58 p.m.

1 stop8h 08m

C$ 556

TorontoLouisville

YYZ Toronto Pearson Intl - SDF Louisville Intl

YYZSDF

Toronto Pearson Intl

Thu 8/10

11:38 a.m.-8:35 p.m.

1 stop8h 57m

Louisville Intl

Tue 13/10

1:59 p.m.-9:59 p.m.

1 stop8h 00m

C$ 561

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

Showing 1-10 of 52 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, September is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of C$ 625). Flying from Region of Ontario to Louisville in January is currently the most expensive (average of C$ 1,008). 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?

    Delta, American Airlines, and Air Canada can get you from Region of Ontario to Louisville in just under 5h 43m. Your travel time can differ by up to 2h 06m. 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 Montreal Pierre Elliott Trudeau Intl - Louisville Intl. You may also consider Toronto Pearson 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, September is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of C$ 625). Flying from Region of Ontario to Louisville in January is currently the most expensive (average of C$ 1,008). 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

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.
Pearson Intl to Nashville flights
Pierre Elliott Trudeau Intl to Nashville flights
Toronto Island to Nashville flights
Pearson Intl to Cincinnati flights
Calgary to Nashville flights
Pierre Elliott Trudeau Intl to Cincinnati flights
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Pearson Intl to Knoxville flights
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Pearson Intl to Louisville flights
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Victoria to Nashville flights
Edmonton to Cincinnati flights
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Grande Prairie to Nashville flights
Kelowna to Nashville flights
Vancouver Intl to Knoxville flights
Pierre Elliott Trudeau Intl to Lexington flights
Pearson Intl to Blountville flights
Vancouver Intl to Lexington flights
Pierre Elliott Trudeau Intl to Knoxville flights
Ottawa to Louisville flights
Calgary to Louisville flights
Charlottetown to Nashville flights
Québec City to Knoxville flights
London to Nashville flights
Windsor to Nashville flights
Vancouver Intl to Blountville flights
Halifax to Cincinnati flights
Ottawa to Lexington flights
Victoria to Lexington flights
Victoria to Cincinnati flights
Saskatoon to Cincinnati flights
St. John's to Nashville flights

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 11 August 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 429AverageC$ 681FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 544AverageC$ 829FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 683AverageC$ 807FlexibilityNo 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.

Can Cheapflights notify me if prices for flights from Ontario to Louisville become cheaper?

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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