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Cheap flights from Ontario to Louisville from C$ 246

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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

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 30 October 2025.

Round-trip from

C$ 369

One-way from

C$ 246

Popular in

October

Cheapest in

February

Average price

C$ 856
8/1-12/1
  • 8/1-12/1
  • 2 total stops
  • 16h 59m total
  • Ontario to Louisville
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14/12
  • 14/12
  • 1 total stop
  • 14h 30m total
  • Ontario to Louisville
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 154 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Find 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 30 October 2025.

Wed 12/115:55 p.m.YOW - SDF
1 stop5h 59mUnited Airlines
Tue 18/118:30 a.m.SDF - YOW
1 stop5h 02mUnited Airlines
Deal found 28/10C$ 487
Wed 12/116:20 a.m.YOW - SDF
1 stop6h 57mMultiple Airlines
Tue 18/116:45 a.m.SDF - YOW
2 stops9h 33mMultiple Airlines
Deal found 28/10C$ 560
Thu 13/114:15 p.m.YOW - SDF
1 stop16h 49mMultiple Airlines
Mon 17/117:11 p.m.SDF - YOW
1 stop22h 14mMultiple Airlines
Deal found 28/10C$ 568
Sun 23/117:40 a.m.YYZ - SDF
1 stop24h 53mMultiple Airlines
Sat 29/113:42 p.m.SDF - YYZ
1 stop20h 01mMultiple Airlines
Deal found 30/10C$ 610
Sun 14/128:00 a.m.YUL - SDF
1 stop27h 00mMultiple Airlines
Sun 21/122:55 p.m.SDF - YUL
2 stops33h 35mMultiple Airlines
Deal found 30/10C$ 610
Thu 20/117:00 a.m.YYZ - SDF
1 stop10h 53mMultiple Airlines
Sun 23/118:31 p.m.SDF - YYZ
2 stops27h 40mMultiple Airlines
Deal found 28/10C$ 616
Fri 12/1210:58 a.m.YYZ - SDF
1 stop10h 40mAmerican Airlines
Sun 14/126:08 a.m.SDF - YYZ
1 stop10h 27mAmerican Airlines
Deal found 29/10C$ 656
Mon 24/117:35 a.m.YYZ - SDF
1 stop26h 55mMultiple Airlines
Sun 30/118:31 p.m.SDF - YYZ
2 stops27h 40mMultiple Airlines
Deal found 29/10C$ 679
Fri 12/126:10 a.m.YYZ - SDF
2 stops10h 13mMultiple Airlines
Sun 14/1211:55 a.m.SDF - YYZ
1 stop11h 25mMultiple Airlines
Deal found 29/10C$ 694
Wed 3/127:30 a.m.YUL - SDF
2 stops12h 34mAmerican Airlines
Sat 20/127:24 p.m.SDF - YUL
1 stop18h 22mAmerican Airlines
Deal found 28/10C$ 748
Fri 12/125:40 a.m.YOW - SDF
2 stops11h 56mDelta
Fri 19/1211:42 a.m.SDF - YOW
2 stops13h 00mDelta
Deal found 28/10C$ 753
Sat 13/122:15 p.m.YYZ - SDF
1 stop8h 14mUnited Airlines
Sat 20/1210:50 a.m.SDF - YYZ
1 stop12h 04mUnited Airlines
Deal found 29/10C$ 755

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 30 October 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 8/1

7:10 a.m.-3:49 p.m.

1 stop8h 39m

Louisville Intl

Mon 12/1

6:00 a.m.-2:20 p.m.

1 stop8h 20m

C$ 369

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 24/2

2:15 p.m.-7:42 p.m.

1 stop5h 27m

Louisville Intl

Wed 25/2

10:45 a.m.-4:30 p.m.

1 stop5h 45m

C$ 420

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 30/3

7:25 p.m.-10:17 a.m.

1 stop14h 52m

Louisville Intl

Wed 8/4

7:30 a.m.-1:45 p.m.

1 stop6h 15m

C$ 420

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Wed 12/11

5:55 p.m.-11:54 p.m.

1 stop5h 59m

Louisville Intl

Tue 18/11

8:30 a.m.-1:32 p.m.

1 stop5h 02m

C$ 487

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 24/2

2:50 p.m.-10:13 p.m.

2 stops7h 23m

Louisville Intl

Wed 25/2

9:50 a.m.-10:18 p.m.

2 stops12h 28m

C$ 493

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 30/3

1:30 p.m.-10:30 p.m.

1 stop9h 00m

Louisville Intl

Wed 8/4

6:00 a.m.-4:16 p.m.

2 stops10h 16m

C$ 503

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Wed 25/2

8:15 a.m.-10:13 p.m.

1 stop13h 58m

Louisville Intl

Thu 26/2

5:35 a.m.-4:39 p.m.

1 stop11h 04m

C$ 510

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 20/11

7:00 a.m.-5:53 p.m.

1 stop10h 53m

Louisville Intl

Sun 23/11

8:31 p.m.-12:11 a.m.

2 stops27h 40m

C$ 616

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 12/12

10:58 a.m.-9:38 p.m.

1 stop10h 40m

Louisville Intl

Sun 14/12

6:08 a.m.-4:35 p.m.

1 stop10h 27m

C$ 656

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sun 14/12

8:00 a.m.-11:00 a.m.

1 stop27h 00m

Louisville Intl

Sun 21/12

7:44 p.m.-2:54 p.m.

1 stop19h 10m

C$ 660

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

Showing 1-10 of 39 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$ 194). Flying from Region of Ontario to Louisville in August is currently the most expensive (average of C$ 519). 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 30 October 2025.

One of the essential ways to save on airfare from Region of Ontario to Louisville is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 16% on airfare.

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 and American Airlines can get you from Region of Ontario to Louisville in just under 5h 27m. Your travel time can differ by up to 7h 07m. 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 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 C$ 249. Users have also found prices from C$ 285 and C$ 293 on Air Canada and Delta, respectively.

  • 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$ 194). Flying from Region of Ontario to Louisville in August is currently the most expensive (average of C$ 519). 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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Halifax to Knoxville flights
Pierre Elliott Trudeau Intl to Knoxville flights
Québec City to Knoxville flights
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Fort St. John 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 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 194AverageC$ 511FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 364AverageC$ 625FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 434AverageC$ 640FlexibilityNo 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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