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Cheap flights from Ontario to Louisville from C$ 231

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 29/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
14 Jan — 21 Jan1
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 15 December 2025.

Sun 28/125:00 a.m.YOW - SDF
2 stops17h 30mUnited Airlines
Sun 18/111:10 a.m.SDF - YOW
1 stop10h 08mUnited Airlines
Deal found 13/12C$ 669
Sun 28/129:10 a.m.YOW - SDF
2 stops12h 44mAmerican Airlines
Sun 18/16:00 a.m.SDF - YOW
2 stops10h 53mAmerican Airlines
Deal found 13/12C$ 759
Sat 27/126:00 a.m.YUL - SDF
1 stop16h 30mUnited Airlines
Fri 1/58:40 a.m.SDF - YUL
1 stop4h 30mUnited Airlines
Deal found 13/12C$ 814
Tue 30/127:08 a.m.YUL - SDF
1 stop17h 08mAmerican Airlines
Fri 1/58:15 p.m.SDF - YUL
1 stop17h 20mAmerican Airlines
Deal found 13/12C$ 836
Tue 23/1210:00 a.m.YYZ - SDF
1 stop4h 44mUnited Airlines
Tue 6/18:29 a.m.SDF - YYZ
1 stop11h 16mUnited Airlines
Deal found 14/12C$ 863
Thu 25/126:00 a.m.YUL - SDF
1 stop14h 32mUnited Airlines
Wed 6/56:00 a.m.SDF - YUL
1 stop7h 10mUnited Airlines
Deal found 13/12C$ 877
Tue 30/127:08 a.m.YUL - SDF
1 stop11h 13mAmerican Airlines
Fri 2/18:05 a.m.SDF - YUL
1 stop7h 05mAmerican Airlines
Deal found 14/12C$ 881
Tue 23/128:30 p.m.YYZ - SDF
1 stop27h 29mMultiple Airlines
Tue 6/15:05 a.m.SDF - YYZ
2 stops43h 06mMultiple Airlines
Deal found 14/12C$ 890
Sat 27/126:00 a.m.YUL - SDF
1 stop11h 28mAir Canada
Tue 5/56:00 p.m.SDF - YUL
2 stops7h 51mAir Canada
Deal found 13/12C$ 896
Tue 23/129:15 a.m.YUL - SDF
1 stop5h 29mUnited Airlines
Sun 4/15:40 a.m.SDF - YUL
1 stop8h 20mUnited Airlines
Deal found 13/12C$ 910
Wed 31/128:00 a.m.YUL - SDF
1 stop15h 59mMultiple Airlines
Mon 4/57:48 p.m.SDF - YUL
2 stops22h 07mMultiple Airlines
Deal found 13/12C$ 914
Sun 21/1211:38 a.m.YYZ - SDF
1 stop11h 52mAmerican Airlines
Sun 28/127:00 a.m.SDF - YYZ
1 stop10h 29mAmerican Airlines
Deal found 14/12C$ 927

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 15 December 2025.

Round-trip from

C$ 388

One-way from

C$ 231

Popular in

October

Cheapest in

February

Average price

C$ 741
13/1-20/1
  • 13/1-20/1
  • 3 total stops
  • 58h 20m total
  • Ontario to Louisville
Search Deals
29/1
  • 29/1
  • 1 total stop
  • 26h 24m total
  • Ontario to Louisville
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 265 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 15 December 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

Tue 13/1

7:15 a.m.-1:00 p.m.

1 stop29h 45m

Louisville Intl

Tue 20/1

3:36 p.m.-8:11 p.m.

2 stops28h 35m

C$ 388

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Sun 11/1

5:55 p.m.-11:23 p.m.

1 stop5h 28m

Louisville Intl

Sun 18/1

8:29 a.m.-5:12 p.m.

1 stop8h 43m

C$ 419

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sun 25/1

12:15 p.m.-6:04 p.m.

3 stops29h 49m

Louisville Intl

Fri 30/1

1:55 p.m.-12:11 a.m.

1 stop10h 16m

C$ 442

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Thu 29/1

6:45 a.m.-1:00 p.m.

2 stops30h 15m

Louisville Intl

Thu 5/2

3:36 p.m.-4:22 p.m.

1 stop24h 46m

C$ 457

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sat 24/1

8:55 p.m.-2:41 p.m.

1 stop17h 46m

Louisville Intl

Mon 2/2

6:54 p.m.-10:41 a.m.

1 stop15h 47m

C$ 474

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 23/3

5:55 p.m.-11:59 p.m.

1 stop6h 04m

Louisville Intl

Fri 27/3

5:35 a.m.-5:18 p.m.

2 stops11h 43m

C$ 552

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 27/2

11:38 a.m.-9:23 p.m.

1 stop9h 45m

Louisville Intl

Sat 28/2

6:32 a.m.-4:02 p.m.

1 stop9h 30m

C$ 554

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Sun 11/1

4:20 p.m.-6:04 p.m.

3 stops25h 44m

Louisville Intl

Sun 18/1

3:36 p.m.-4:53 p.m.

3 stops25h 17m

C$ 566

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Mon 19/1

10:59 a.m.-10:05 p.m.

1 stop11h 06m

Louisville Intl

Sat 24/1

6:03 a.m.-4:35 p.m.

1 stop10h 32m

C$ 570

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 6/3

8:30 p.m.-11:05 a.m.

1 stop14h 35m

Louisville Intl

Wed 11/3

1:19 p.m.-12:14 a.m.

1 stop10h 55m

C$ 570

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/12

Showing 1-10 of 25 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$ 191). Flying from Region of Ontario to Louisville in October is currently the most expensive (average of C$ 587). 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 15 December 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 42% on airfare.

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 can get you from Region of Ontario to Louisville in just under 5h 28m. Your travel time can differ by up to . The distance from Region of Ontario to Louisville is about 1151 km.

  • 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$ 191). Flying from Region of Ontario to Louisville in October is currently the most expensive (average of C$ 587). 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 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 15 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 191AverageC$ 661FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 366AverageC$ 716FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 428AverageC$ 661FlexibilityNo 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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