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Cheap flights from Ontario to Louisville from C$ 228

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
5 May — 12 May1
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 30 April 2025.

Round-trip from

C$ 411

One-way from

C$ 228

Popular in

January

Cheapest in

February

Average price

C$ 487
Delta
  • Delta
  • 12/5-15/5
  • 2 total stops
  • 13h 26m total
  • Ontario to Louisville
Search Deals
12/5
  • 12/5
  • 2 total stops
  • 11h 08m total
  • Ontario to Louisville
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 30 April 2025.

Mon 12/511:30 a.m.YYZ - SDF
1 stop9h 06mDelta
Thu 15/56:00 a.m.SDF - YYZ
1 stop4h 20mDelta
Deal found 28/4C$ 411
Fri 20/63:45 p.m.YYZ - SDF
1 stop8h 14mAmerican Airlines
Thu 26/67:13 a.m.SDF - YYZ
1 stop4h 51mAmerican Airlines
Deal found 28/4C$ 424
Sat 7/68:10 a.m.YYZ - SDF
1 stop6h 31mUnited Airlines
Sat 7/66:00 p.m.SDF - YYZ
1 stop5h 07mUnited Airlines
Deal found 28/4C$ 444
Mon 12/53:00 p.m.YYZ - SDF
1 stop6h 38mAir Canada
Thu 15/56:00 a.m.SDF - YYZ
2 stops7h 00mAir Canada
Deal found 28/4C$ 448
Mon 12/57:00 a.m.YYZ - SDF
3 stops29h 03mMultiple Airlines
Thu 15/511:23 a.m.SDF - YYZ
1 stop12h 24mMultiple Airlines
Deal found 28/4C$ 472
Sat 17/56:05 p.m.YYZ - SDF
1 stop3h 56mWestJet
Sun 18/56:19 a.m.SDF - YYZ
1 stop5h 21mWestJet
Deal found 28/4C$ 512
Thu 29/55:55 a.m.YOW - SDF
2 stops14h 58mWestJet
Sat 31/57:05 a.m.SDF - YOW
2 stops17h 17mWestJet
Deal found 27/4C$ 702
Thu 29/56:12 a.m.YOW - SDF
1 stop6h 50mUnited Airlines
Sat 31/52:05 p.m.SDF - YOW
1 stop7h 30mUnited Airlines
Deal found 27/4C$ 818
Thu 29/59:05 a.m.YOW - SDF
2 stops10h 41mAir Canada
Sat 31/56:00 a.m.SDF - YOW
1 stop3h 58mAir Canada
Deal found 28/4C$ 860
Thu 29/52:20 p.m.YOW - SDF
2 stops8h 23mMultiple Airlines
Sat 31/56:25 p.m.SDF - YOW
1 stop22h 41mMultiple Airlines
Deal found 28/4C$ 865
Mon 12/511:15 a.m.YUL - SDF
1 stop8h 32mUnited Airlines
Wed 14/511:00 a.m.SDF - YUL
1 stop6h 26mUnited Airlines
Deal found 29/4C$ 1,005

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 April 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

Mon 12/5

11:30 a.m.-8:36 p.m.

1 stop9h 06m

Louisville Intl

Thu 15/5

6:00 a.m.-10:20 a.m.

1 stop4h 20m

C$ 411

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Fri 20/6

3:45 p.m.-11:59 p.m.

1 stop8h 14m

Louisville Intl

Thu 26/6

7:13 a.m.-12:04 p.m.

1 stop4h 51m

C$ 424

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sat 7/6

8:10 a.m.-2:41 p.m.

1 stop6h 31m

Louisville Intl

Sat 7/6

6:00 p.m.-11:07 p.m.

1 stop5h 07m

C$ 444

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Mon 12/5

3:00 p.m.-9:38 p.m.

1 stop6h 38m

Louisville Intl

Thu 15/5

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

2 stops7h 00m

C$ 448

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Mon 12/5

7:00 a.m.-12:03 p.m.

3 stops29h 03m

Louisville Intl

Thu 15/5

11:23 a.m.-11:47 p.m.

1 stop12h 24m

C$ 472

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sat 17/5

6:05 p.m.-10:01 p.m.

1 stop3h 56m

Louisville Intl

Sun 18/5

6:19 a.m.-11:40 a.m.

1 stop5h 21m

C$ 512

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Thu 29/5

5:55 a.m.-8:53 p.m.

2 stops14h 58m

Louisville Intl

Sat 31/5

7:05 a.m.-12:22 a.m.

2 stops17h 17m

C$ 702

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Thu 29/5

6:12 a.m.-1:02 p.m.

1 stop6h 50m

Louisville Intl

Sat 31/5

2:05 p.m.-9:35 p.m.

1 stop7h 30m

C$ 818

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Thu 29/5

6:12 a.m.-7:46 p.m.

1 stop13h 34m

Louisville Intl

Sat 31/5

11:10 a.m.-9:35 p.m.

1 stop10h 25m

C$ 860

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Thu 29/5

2:20 p.m.-10:43 p.m.

2 stops8h 23m

Louisville Intl

Sat 31/5

6:25 p.m.-5:06 p.m.

1 stop22h 41m

C$ 865

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 18 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$ 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 30 April 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.

Rainfall in Louisville by month

Plan your trip to Louisville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Louisville ranges from 79.0 - 135.0 mm per month. May is typically the wettest month, when rainfall can reach 135.0 mm. September is typically the driest time to visit Louisville when rainfall is around 79.0 mm.

Temperature in Louisville by month

Plan your trip to Louisville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Louisville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 30 April 2025.
Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Ontario to Louisville. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,929 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
WestJet
7.2
Good
2,826 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.0
Good
9,244 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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$ 242. Users have also found prices from C$ 262 and C$ 314 on Delta 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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 192AverageC$ 717FlexibilityNo 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$ 723FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 407AverageC$ 502FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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

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