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$106+ Cheap flights from Louisville (SDF) to Ontario

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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Louisville to Ontario

Keep the following information in mind while searching for Louisville to Ontario flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$359
(Kiwi.com)

One-way from

$106
(Mytrip)

Popular in

October

Cheapest in

November

Average price

$747
Provider with most accurate pricing for Louisville Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Toronto (YTO) flights.
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From Louisville Intl to Ontario
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One-way flight from Louisville Intl to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Louisville to Ontario

Cheapest flights from Louisville to Ontario
Explore the most affordable flight options available from Louisville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/147:11 pmSDF - YYZ
1 stop16h 32mMultiple Airlines
Mon 11/177:00 amYYZ - SDF
1 stop11h 16mMultiple Airlines
Deal found 10/29$359
This Mytrip deal was found by Cheapflights users on 10/27. 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 11/256:48 pmSDF - YUL
2 stops22h 07mMultiple Airlines
Tue 12/26:45 amYUL - SDF
2 stops11h 08mMultiple Airlines
Deal found 10/27$424
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/147:11 pmSDF - YUL
1 stop19h 59mMultiple Airlines
Sun 11/238:00 amYUL - SDF
1 stop11h 36mMultiple Airlines
Deal found 10/28$456
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Mon 11/249:23 amSDF - YUL
2 stops22h 09mMultiple Airlines
Tue 12/26:45 amYUL - SDF
2 stops11h 08mMultiple Airlines
Deal found 10/29$459
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Mon 11/107:11 pmSDF - YYZ
1 stop16h 32mMultiple Airlines
Sat 11/158:15 pmYYZ - SDF
2 stops22h 01mMultiple Airlines
Deal found 10/29$467
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Sun 11/308:31 pmSDF - YYZ
2 stops23h 29mMultiple Airlines
Sat 12/68:20 pmYYZ - SDF
2 stops14h 40mMultiple Airlines
Deal found 10/30$468
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Mon 11/249:23 amSDF - YYZ
1 stop8h 31mMultiple Airlines
Mon 11/248:30 pmYYZ - SDF
2 stops21h 23mMultiple Airlines
Deal found 10/30$485
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 11/126:01 amSDF - YYZ
1 stop10h 34mAmerican Airlines
Sat 11/1510:57 amYYZ - SDF
1 stop10h 32mAmerican Airlines
Deal found 10/29$520
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sun 12/1411:55 amSDF - YUL
1 stop28h 28mMultiple Airlines
Sun 12/214:35 pmYUL - SDF
2 stops31h 24mMultiple Airlines
Deal found 10/30$522
This Mytrip deal was found by Cheapflights users on 10/28. 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 12/1211:55 amSDF - YUL
3 stops36h 35mMultiple Airlines
Sun 12/145:25 pmYUL - SDF
2 stops17h 06mMultiple Airlines
Deal found 10/28$532
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/242:02 pmSDF - YUL
1 stop23h 58mUnited Airlines
Tue 12/24:45 pmYUL - SDF
1 stop20h 27mUnited Airlines
Deal found 10/29$542
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Wed 12/315:05 amSDF - YYZ
1 stop17h 07mMultiple Airlines
Sun 1/43:40 pmYYZ - SDF
1 stop28h 23mMultiple Airlines
Deal found 10/29$554

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Ontario 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 October 30, 2025.
Use the filters below to find and compare flights from Louisville to Ontario that are best for you.

Fly from

Louisville

Fly to

Ontario

Route

Depart

Return

Price

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Fri 11/14

7:11 pm-11:43 am

1 stop16h 32m

Toronto Pearson Intl

Mon 11/17

7:00 am-6:16 pm

1 stop11h 16m

$359

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 2/18

6:15 am-1:34 pm

1 stop7h 19m

Ottawa

Sun 2/22

5:48 pm-11:59 pm

1 stop6h 11m

$363

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Tue 11/25

6:48 pm-4:55 pm

2 stops22h 07m

Montreal Pierre Elliott Trudeau Intl

Tue 12/2

6:45 am-5:53 pm

2 stops11h 08m

$424

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 2/18

6:15 am-4:18 pm

2 stops10h 03m

Ottawa

Sun 2/22

5:48 pm-11:59 pm

1 stop6h 11m

$443

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Fri 11/14

7:11 pm-3:10 pm

1 stop19h 59m

Montreal Pierre Elliott Trudeau Intl

Sun 11/23

8:00 am-7:36 pm

1 stop11h 36m

$456

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Mon 11/24

9:23 am-7:32 am

2 stops22h 09m

Montreal Pierre Elliott Trudeau Intl

Tue 12/2

6:45 am-5:53 pm

2 stops11h 08m

$459

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Sun 11/30

8:31 pm-8:00 pm

2 stops23h 29m

Toronto Pearson Intl

Sat 12/6

8:20 pm-11:00 am

2 stops14h 40m

$468

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 11/24

9:23 am-5:54 pm

1 stop8h 31m

Toronto Pearson Intl

Mon 11/24

8:30 pm-5:53 pm

2 stops21h 23m

$485

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 11/12

6:01 am-4:35 pm

1 stop10h 34m

Toronto Pearson Intl

Sat 11/15

10:57 am-9:29 pm

1 stop10h 32m

$520

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 12/31

5:05 am-8:03 pm

2 stops14h 58m

Toronto Pearson Intl

Sun 1/4

3:40 pm-8:03 pm

1 stop28h 23m

$520

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 25 results
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Best time to book a flight from Louisville to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Louisville 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 Louisville to Ontario

What is the cheapest month to book a flight from Louisville to Region of Ontario?

Currently, December is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $183). Flying from Louisville to Region of Ontario in September is currently the most expensive (average of $326). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated October 30, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Louisville to Ontario have to say. 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
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Overall

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Overall

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Overall

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,030 reviews
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Overall

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
WestJet
7.2
Good
3,149 reviews
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Overall

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Louisville to Ontario. 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 from for flights from Louisville to Ontario?

    If you book a flight to Ontario from Louisville, you will be flying from Louisville Intl, which is the city’s only airport. Louisville Intl (SDF) is located 5.3 mi from the center of Louisville.

  • How long is the flight from Louisville to Region of Ontario?

    Airlines like United Airlines and Air Canada fly from Louisville to Region of Ontario in about 7h 19m. The time it takes to get you to your destination can typically vary by up to 2h 44m. The distance from Louisville to Region of Ontario is about 715 mi. This flight may include one or multiple stops.

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

    The most popular flight routes from Louisville to Region of Ontario are Louisville Intl - Toronto Pearson Intl, Louisville Intl - Montreal Pierre Elliott Trudeau Intl and Louisville Intl - Ottawa.

  • Can I find deals for flights from Louisville to Ontario that include hotel bookings?

    Yes. In addition to deals on Louisville to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to Ontario.

  • Can I find deals for business class flights from Louisville to Ontario?

    Yes. Cheapflights offers flight deals from Louisville to Ontario 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 Louisville to Region of Ontario?

    Currently, December is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $183). Flying from Louisville to Region of Ontario in September is currently the most expensive (average of $326). 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 Louisville to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Louisville to Ontario

Discover the top 4 airlines that operate flights from Louisville to Ontario. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$183Average$615FlexibilityNo cancel feeOn-time60%
DeltaCheapest$303Average$496FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$310Average$537FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$317Average$358FlexibilityNo cancel feeOn-time71%

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