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$168+ Cheap flights from Ontario to Louisville (SDF)

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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
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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 April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$280
(Kiwi.com)

One-way from

$168
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$328
Provider with most accurate pricing for Toronto (YTO)-Louisville Intl flight deals.
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Provider most trusted by Cheapflights users for Toronto (YTO)-Louisville Intl flights.
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From Ontario to Louisville Intl
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One-way flight from Ontario to Louisville Intl
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Highest demand for flights based on searches. 9% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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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 April 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/256:45 amYYZ - SDF
1 stop11h 46mMultiple Airlines
Mon 4/285:45 amSDF - YYZ
2 stops15h 41mMultiple Airlines
Deal found 4/2$280
This American Airlines deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/83:45 pmYYZ - SDF
1 stop8h 33mAmerican Airlines
Sun 5/116:15 amSDF - YYZ
1 stop4h 50mAmerican Airlines
Deal found 4/3$285
This United Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3112:00 pmYYZ - SDF
1 stop8h 26mUnited Airlines
Wed 6/46:00 amSDF - YYZ
1 stop9h 59mUnited Airlines
Deal found 4/2$289
This Delta deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/811:30 amYYZ - SDF
1 stop9h 06mDelta
Sun 5/112:38 pmSDF - YYZ
1 stop8h 20mDelta
Deal found 4/2$290
This Delta deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/184:50 pmYUL - SDF
1 stop4h 44mDelta
Sun 4/277:43 amSDF - YUL
1 stop8h 17mDelta
Deal found 4/2$311
This WestJet deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/126:25 pmYYZ - SDF
1 stop15h 15mWestJet
Mon 6/167:14 pmSDF - YYZ
1 stop22h 01mWestJet
Deal found 4/2$340
This FlightHub deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:00 amYUL - SDF
1 stop6h 49mWestJet
Mon 9/292:59 pmSDF - YUL
1 stop8h 54mWestJet
Deal found 4/1$505
This Air Canada deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1810:15 amYUL - SDF
2 stops10h 14mAir Canada
Sun 4/277:29 amSDF - YUL
1 stop9h 57mAir Canada
Deal found 4/2$579
This Justfly.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/305:55 amYOW - SDF
2 stops15h 50mWestJet
Sun 5/49:32 amSDF - YOW
2 stops14h 50mWestJet
Deal found 4/2$719
This United Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/305:25 pmYOW - SDF
1 stop5h 05mUnited Airlines
Sun 5/46:00 amSDF - YOW
1 stop3h 58mUnited Airlines
Deal found 4/2$810

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 2,558,603 searches. Data last updated April 3, 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

Fri 4/25

6:45 am-6:31 pm

1 stop11h 46m

Louisville Intl

Mon 4/28

5:45 am-9:26 pm

2 stops15h 41m

$280

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 5/8

3:45 pm-12:18 am

1 stop8h 33m

Louisville Intl

Sun 5/11

6:15 am-11:05 am

1 stop4h 50m

$285

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sat 5/31

12:00 pm-8:26 pm

1 stop8h 26m

Louisville Intl

Wed 6/4

6:00 am-3:59 pm

1 stop9h 59m

$289

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 5/8

11:30 am-8:36 pm

1 stop9h 06m

Louisville Intl

Sun 5/11

2:38 pm-10:58 pm

1 stop8h 20m

$290

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Fri 4/18

4:50 pm-9:34 pm

1 stop4h 44m

Louisville Intl

Sun 4/27

7:43 am-4:00 pm

1 stop8h 17m

$311

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 6/12

6:25 pm-9:40 am

1 stop15h 15m

Louisville Intl

Mon 6/16

7:14 pm-5:15 pm

1 stop22h 01m

$340

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Fri 4/18

10:15 am-8:29 pm

2 stops10h 14m

Louisville Intl

Sun 4/27

7:29 am-5:26 pm

1 stop9h 57m

$579

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Wed 4/30

5:55 am-9:45 pm

2 stops15h 50m

Louisville Intl

Sun 5/4

9:32 am-12:22 am

2 stops14h 50m

$719

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Wed 4/30

5:25 pm-10:30 pm

1 stop5h 05m

Louisville Intl

Sun 5/4

6:00 am-9:58 am

1 stop3h 58m

$810

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sat 5/3

6:45 am-10:17 pm

2 stops15h 32m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 16 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, January is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of $299). Flying from Region of Ontario to Louisville in April is currently the most expensive (average of $369). 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 April 3, 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 3.1 - 5.3 inches per month. May is typically the wettest month, when rainfall can reach 5.3 in. September is typically the driest time to visit Louisville when rainfall is around 3.1 in.

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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 April 3, 2025.
To help decide which airline to fly from Ontario to Louisville, see what other customers have to say about Delta, United Airlines and American Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

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
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

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
8,616 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

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
7,897 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

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
2,795 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

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
9,029 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

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?

    Louisville Intl (SDF), located 5.3 mi from the city center, is the airport you fly into when you book flights from Ontario to Louisville.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $172. Users have also found prices from $176 and $211 on American Airlines and United Airlines, respectively.

  • What are the most popular routes from Region of Ontario to Louisville?

    When deciding which route to take from Region of Ontario to Louisville consider Toronto Pearson Intl - Louisville Intl, Montreal Pierre Elliott Trudeau Intl - Louisville Intl or Ottawa - Louisville Intl as they are the most popular.

  • 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, January is the cheapest month in which you can book a flight from Region of Ontario to Louisville (average of $299). Flying from Region of Ontario to Louisville in April is currently the most expensive (average of $369). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Jeffersonville
Corydon
Elizabethtown
Bardstown

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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 2 airlines flying from Ontario to Louisville

Discover the top 2 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 2,558,603 searches. Data last updated April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$258Average$327FlexibilityNo cancel feeOn-time71%
WestJetCheapest$296Average$402FlexibilityNo cancel feeOn-time60%

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