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Cheap flights from Ontario to Louisville from C$ 212

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
5 Aug — 12 Aug1
1 adult

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 31 July 2025.

Round-trip from

C$ 459

One-way from

C$ 212

Popular in

January

Cheapest in

February

Average price

C$ 660
American Airlines
  • American Airlines
  • 13/9-20/9
  • 2 total stops
  • 28h 06m total
  • Ontario to Louisville
Search Deals
14/9
  • 14/9
  • 1 total stop
  • 15h 34m total
  • Ontario to Louisville
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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Find flight deals from Ontario to Louisville

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 31 July 2025.

Wed 3/99:50 a.m.YYZ - SDF
1 stop23h 29mMultiple Airlines
Mon 8/911:17 a.m.SDF - YYZ
1 stop26h 48mMultiple Airlines
Deal found 28/7C$ 429
Sat 13/912:31 p.m.YUL - SDF
1 stop10h 32mAmerican Airlines
Sat 20/96:12 p.m.SDF - YUL
1 stop17h 34mAmerican Airlines
Deal found 30/7C$ 459
Tue 28/101:15 p.m.YYZ - SDF
1 stop9h 48mAmerican Airlines
Mon 3/116:00 a.m.SDF - YYZ
1 stop10h 04mAmerican Airlines
Deal found 31/7C$ 538
Sat 13/96:45 a.m.YUL - SDF
1 stop26h 34mMultiple Airlines
Sat 20/910:14 a.m.SDF - YUL
2 stops31h 41mMultiple Airlines
Deal found 29/7C$ 554
Mon 15/97:00 a.m.YOW - SDF
2 stops15h 04mMultiple Airlines
Sat 20/98:23 a.m.SDF - YOW
1 stop8h 57mMultiple Airlines
Deal found 31/7C$ 555
Mon 6/109:00 p.m.YYZ - SDF
1 stop13h 01mUnited Airlines
Fri 7/117:00 a.m.SDF - YYZ
1 stop14h 21mUnited Airlines
Deal found 31/7C$ 570
Sat 13/98:20 a.m.YUL - SDF
1 stop12h 13mUnited Airlines
Sat 20/99:05 a.m.SDF - YUL
1 stop9h 45mUnited Airlines
Deal found 29/7C$ 624
Mon 15/95:25 p.m.YOW - SDF
1 stop27h 03mUnited Airlines
Sat 20/97:36 p.m.SDF - YOW
1 stop18h 28mUnited Airlines
Deal found 31/7C$ 724
Fri 12/91:20 p.m.YYZ - SDF
1 stop5h 08mWestJet
Sun 14/96:00 a.m.SDF - YYZ
2 stops12h 52mWestJet
Deal found 30/7C$ 768
Wed 6/812:47 p.m.YUL - SDF
1 stop21h 02mWestJet
Thu 7/812:50 p.m.SDF - YUL
1 stop5h 04mWestJet
Deal found 30/7C$ 945
Mon 4/86:59 p.m.YUL - SDF
1 stop5h 33mDelta
Fri 8/85:53 p.m.SDF - YUL
1 stop6h 02mDelta
Deal found 31/7C$ 1,085
Thu 21/85:55 a.m.YOW - SDF
2 stops12h 35mDelta
Sun 24/810:24 a.m.SDF - YOW
2 stops13h 58mDelta
Deal found 31/7C$ 1,120

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 31 July 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

Wed 3/9

9:50 a.m.-9:19 a.m.

1 stop23h 29m

Louisville Intl

Mon 8/9

11:17 a.m.-2:05 p.m.

1 stop26h 48m

C$ 429

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sat 13/9

12:31 p.m.-11:03 p.m.

1 stop10h 32m

Louisville Intl

Sat 20/9

6:12 p.m.-11:46 a.m.

1 stop17h 34m

C$ 459

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Tue 28/10

1:15 p.m.-11:03 p.m.

1 stop9h 48m

Louisville Intl

Mon 3/11

6:00 a.m.-4:04 p.m.

1 stop10h 04m

C$ 538

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sat 13/9

6:45 a.m.-9:19 a.m.

1 stop26h 34m

Louisville Intl

Sat 20/9

10:14 a.m.-5:55 p.m.

2 stops31h 41m

C$ 554

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 15/9

7:00 a.m.-10:04 p.m.

2 stops15h 04m

Louisville Intl

Sat 20/9

8:23 a.m.-5:20 p.m.

1 stop8h 57m

C$ 555

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Mon 6/10

9:00 p.m.-10:01 a.m.

1 stop13h 01m

Louisville Intl

Fri 7/11

7:00 a.m.-9:21 p.m.

1 stop14h 21m

C$ 570

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sat 13/9

8:20 a.m.-8:33 p.m.

1 stop12h 13m

Louisville Intl

Sat 20/9

7:20 a.m.-7:09 p.m.

2 stops11h 49m

C$ 624

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 15/9

5:25 p.m.-8:28 p.m.

1 stop27h 03m

Louisville Intl

Sat 20/9

7:36 p.m.-2:04 p.m.

1 stop18h 28m

C$ 724

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 12/9

1:20 p.m.-6:28 p.m.

1 stop5h 08m

Louisville Intl

Sun 14/9

6:00 a.m.-6:52 p.m.

2 stops12h 52m

C$ 768

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Thu 21/8

5:55 a.m.-6:30 p.m.

2 stops12h 35m

Louisville Intl

Sun 24/8

10:24 a.m.-12:22 a.m.

2 stops13h 58m

C$ 1,120

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 17 results
1
2

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$ 332). Flying from Region of Ontario to Louisville in September is currently the most expensive (average of C$ 487). 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 31 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Louisville as you normally would.

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Louisville. Reviews last updated 31 July 2025.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from Ontario to Louisville by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
WestJet
7.2
Good
2,978 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • What are the cheapest airlines to fly from Region of Ontario to Louisville one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as C$ 466. Users have also found prices from C$ 476 and C$ 479 on United Airlines and WestJet, 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 Ottawa - Louisville Intl or Montreal Pierre Elliott Trudeau Intl - 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$ 332). Flying from Region of Ontario to Louisville in September is currently the most expensive (average of C$ 487). 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 5 airlines flying from Ontario to Louisville

Discover the top 5 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 31 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 192AverageC$ 657FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 199AverageC$ 387FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 349AverageC$ 421FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 360AverageC$ 494FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 390AverageC$ 554FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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

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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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