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$126+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/13. 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 stop9h 35mMultiple Airlines
Sun 1/48:20 pmYYZ - SDF
2 stops27h 39mMultiple Airlines
Deal found 12/13$547
This Kiwi.com deal was found by Cheapflights users on 12/13. 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.
Tue 12/235:05 amSDF - YYZ
1 stop30h 38mMultiple Airlines
Sun 12/2811:15 amYYZ - SDF
1 stop12h 44mMultiple Airlines
Deal found 12/13$588
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 12/245:05 amSDF - YYZ
1 stop9h 35mMultiple Airlines
Sun 12/287:10 amYYZ - SDF
2 stops16h 49mMultiple Airlines
Deal found 12/13$657
This Mytrip deal was found by Cheapflights users on 12/14. 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 12/215:05 amSDF - YYZ
3 stops26h 00mMultiple Airlines
Sun 12/287:10 amYYZ - SDF
2 stops16h 49mMultiple Airlines
Deal found 12/14$772
This United Airlines deal was found by Cheapflights users on 12/13. 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 12/275:40 amSDF - YUL
1 stop15h 37mUnited Airlines
Wed 12/316:00 amYUL - SDF
1 stop7h 13mUnited Airlines
Deal found 12/13$809
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Tue 12/232:00 pmSDF - YYZ
1 stop5h 45mUnited Airlines
Sun 12/285:30 pmYYZ - SDF
1 stop5h 00mUnited Airlines
Deal found 12/14$870
This American Airlines deal was found by Cheapflights users on 12/14. 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.
Sat 12/277:53 amSDF - YUL
1 stop14h 46mAmerican Airlines
Wed 12/317:30 amYUL - SDF
1 stop14h 14mAmerican Airlines
Deal found 12/14$873
This Air Canada deal was found by Cheapflights users on 12/13. 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.
Sat 12/2710:50 amSDF - YUL
1 stop10h 27mAir Canada
Wed 12/3110:30 amYUL - SDF
2 stops8h 41mAir Canada
Deal found 12/13$889
This FlightHub deal was found by Cheapflights users on 12/14. 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 12/216:51 pmSDF - YYZ
2 stops27h 02mWestJet
Sun 12/286:00 amYYZ - SDF
1 stop9h 59mWestJet
Deal found 12/14$994

Find flight deals from Louisville to Ontario

Keep the following information in mind while searching for Louisville to Ontario flight deals. Data was last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$257
(Kiwi.com)

One-way from

$126
(Kiwi.com)

Popular in

October

Cheapest in

February

Average price

$703
Provider with most accurate pricing for Louisville Intl-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Toronto (YTO) flights.
Search Deals
From Louisville Intl to Ontario
Search Deals
One-way flight from Louisville Intl to Ontario
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($140 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 15, 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

Thu 1/29

3:36 pm-2:40 pm

1 stop23h 04m

Toronto Pearson Intl

Thu 2/5

8:30 pm-6:04 pm

1 stop21h 34m

$257

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Tue 1/27

3:36 pm-11:20 pm

1 stop7h 44m

Toronto Pearson Intl

Tue 2/3

7:15 am-1:00 pm

1 stop29h 45m

$265

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Thu 1/15

3:36 pm-2:40 pm

1 stop23h 04m

Toronto Pearson Intl

Thu 1/29

3:40 pm-6:04 pm

1 stop26h 24m

$290

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Mon 1/12

1:55 pm-12:43 am

2 stops34h 48m

Montreal Pierre Elliott Trudeau Intl

Mon 1/19

8:00 am-2:41 pm

1 stop30h 41m

$353

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Mon 1/5

9:55 am-11:54 pm

1 stop13h 59m

Ottawa

Fri 1/9

2:15 pm-7:43 pm

1 stop5h 28m

$363

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Thu 1/29

9:50 am-2:27 pm

1 stop4h 37m

Ottawa

Mon 2/2

5:55 pm-11:23 pm

1 stop5h 28m

$363

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Thu 1/22

8:14 pm-2:54 pm

1 stop18h 40m

Montreal Pierre Elliott Trudeau Intl

Thu 1/29

6:45 am-1:00 pm

2 stops30h 15m

$364

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 1/28

8:07 am-9:23 pm

1 stop13h 16m

Toronto Pearson Intl

Wed 2/4

11:30 am-11:19 pm

1 stop11h 49m

$380

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Mon 1/5

5:05 am-5:15 pm

2 stops12h 10m

Ottawa

Sun 1/11

4:20 pm-6:04 pm

3 stops25h 44m

$388

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Tue 1/13

3:36 pm-4:22 pm

1 stop24h 46m

Montreal Pierre Elliott Trudeau Intl

Sat 1/17

8:00 am-2:41 pm

1 stop30h 41m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 35 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, April is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $193). 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 December 15, 2025.
See what other customers who have flown with Delta and WestJet 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
8,008 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,202 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Entertainment

7.9

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 fly from Louisville to Region of Ontario in about 13h 59m. The time it takes to get you to your destination can typically vary by up to . The distance from Louisville to Region of Ontario is about 715 mi.

  • 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, April is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $193). 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 airline flying from Louisville to Ontario

Discover the top airline 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$370Average$578FlexibilityNo cancel feeOn-timeN/A

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