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$151+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SDF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$258
(Mytrip)

One-way from

$151
(Mytrip)

Popular in

January

Cheapest in

February

Average price

$355
From Ontario to Louisville Intl
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One-way flight from Ontario to Louisville Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/86:30 amYYZ - SDF
1 stop26h 26mMultiple Airlines
Wed 7/98:13 pmSDF - YYZ
1 stop17h 52mMultiple Airlines
Deal found 6/10$258
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 9/812:30 pmYUL - SDF
1 stop10h 29mAmerican Airlines
Tue 9/96:12 pmSDF - YUL
1 stop17h 33mAmerican Airlines
Deal found 6/12$321
This Mytrip deal was found by Cheapflights users on 6/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/38:15 amYUL - SDF
3 stops27h 05mMultiple Airlines
Sun 7/61:18 pmSDF - YUL
3 stops32h 57mMultiple Airlines
Deal found 6/9$374
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sun 10/512:20 pmYYZ - SDF
1 stop21h 41mUnited Airlines
Sat 10/1110:55 amSDF - YYZ
1 stop10h 07mUnited Airlines
Deal found 6/10$389
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/254:25 pmYOW - SDF
1 stop28h 23mMultiple Airlines
Fri 8/18:13 pmSDF - YOW
1 stop21h 02mMultiple Airlines
Deal found 6/10$426
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Sun 8/33:45 pmYYZ - SDF
1 stop8h 45mAmerican Airlines
Mon 8/116:08 amSDF - YYZ
1 stop10h 27mAmerican Airlines
Deal found 6/12$439
This Delta deal was found by Cheapflights users on 6/10. 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 7/256:00 amYUL - SDF
1 stop8h 54mDelta
Fri 8/15:53 pmSDF - YUL
1 stop6h 02mDelta
Deal found 6/10$464
This Delta deal was found by Cheapflights users on 6/10. 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.
Sun 7/2011:29 amYYZ - SDF
1 stop7h 40mDelta
Sun 7/279:30 amSDF - YYZ
1 stop7h 45mDelta
Deal found 6/10$468
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 9/88:30 amYUL - SDF
2 stops13h 54mUnited Airlines
Tue 9/97:00 amSDF - YUL
2 stops12h 09mUnited Airlines
Deal found 6/12$501
This FlightHub deal was found by Cheapflights users on 6/11. 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.
Sun 8/39:45 amYYZ - SDF
1 stop11h 35mWestJet
Mon 8/116:00 amSDF - YYZ
2 stops16h 54mWestJet
Deal found 6/11$544
This United Airlines deal was found by Cheapflights users on 6/10. 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 6/256:40 amYOW - SDF
1 stop15h 34mUnited Airlines
Sat 7/52:10 pmSDF - YOW
1 stop7h 25mUnited Airlines
Deal found 6/10$549
This FlightHub deal was found by Cheapflights users on 6/11. 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.
Mon 6/306:45 amYUL - SDF
2 stops10h 07mWestJet
Sat 7/510:43 amSDF - YUL
2 stops13h 54mWestJet
Deal found 6/11$588

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 June 12, 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 7/8

6:30 am-8:56 am

1 stop26h 26m

Louisville Intl

Wed 7/9

8:13 pm-2:05 pm

1 stop17h 52m

$258

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Mon 9/8

12:30 pm-10:59 pm

1 stop10h 29m

Louisville Intl

Tue 9/9

6:12 pm-11:45 am

1 stop17h 33m

$321

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Thu 7/3

8:15 am-11:20 am

3 stops27h 05m

Louisville Intl

Sun 7/6

1:18 pm-10:15 pm

3 stops32h 57m

$374

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sun 10/5

12:20 pm-10:01 am

1 stop21h 41m

Louisville Intl

Sat 10/11

10:55 am-9:02 pm

1 stop10h 07m

$389

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Fri 7/25

4:25 pm-8:48 pm

1 stop28h 23m

Louisville Intl

Fri 8/1

8:13 pm-5:15 pm

1 stop21h 02m

$426

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sun 8/3

3:45 pm-12:30 am

1 stop8h 45m

Louisville Intl

Mon 8/11

6:08 am-4:35 pm

1 stop10h 27m

$439

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Fri 7/25

6:00 am-2:54 pm

1 stop8h 54m

Louisville Intl

Fri 8/1

5:53 pm-11:55 pm

1 stop6h 02m

$464

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sun 7/20

11:29 am-7:09 pm

1 stop7h 40m

Louisville Intl

Sun 7/27

9:30 am-5:15 pm

1 stop7h 45m

$468

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Mon 9/8

8:30 am-10:24 pm

2 stops13h 54m

Louisville Intl

Tue 9/9

7:00 am-7:09 pm

2 stops12h 09m

$501

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Sun 8/3

9:45 am-9:20 pm

1 stop11h 35m

Louisville Intl

Mon 8/11

6:00 am-10:54 pm

2 stops16h 54m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 23 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 June 12, 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 June 12, 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
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,531 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 American Airlines. According to our data, you can fly for as low as $232. Users have also found prices from $262 and $263 on Delta 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
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
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 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 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$258Average$327FlexibilityNo cancel feeOn-time71%
WestJetCheapest$296Average$428FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$477Average$635FlexibilityNo cancel feeOn-time69%

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