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Ontario

$119+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/243:33 pm
SDF
-
YYZ
1 stop19h 55m
Multiple Airlines
Tue 3/37:15 am
YYZ
-
SDF
1 stop29h 06m
Multiple Airlines
Deal found 1/27$311
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:33 pm
SDF
-
YYZ
1 stop30h 42m
Multiple Airlines
Thu 3/58:20 pm
YYZ
-
SDF
1 stop16h 01m
Multiple Airlines
Deal found 1/27$323
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/21:19 pm
SDF
-
YYZ
1 stop10h 55m
Multiple Airlines
Fri 3/65:15 pm
YYZ
-
SDF
2 stops17h 50m
Multiple Airlines
Deal found 1/27$329
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:03 pm
SDF
-
YYZ
1 stop12h 11m
Multiple Airlines
Wed 4/155:15 pm
YYZ
-
SDF
1 stop18h 58m
Multiple Airlines
Deal found 1/27$342
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1612:03 pm
SDF
-
YUL
2 stops36h 35m
Multiple Airlines
Mon 3/238:00 am
YUL
-
SDF
1 stop28h 19m
Multiple Airlines
Deal found 1/27$367
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Thu 4/161:03 pm
SDF
-
YYZ
1 stop11h 11m
Multiple Airlines
Sun 4/198:00 pm
YYZ
-
SDF
1 stop15h 38m
Multiple Airlines
Deal found 1/28$386
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/171:14 pm
SDF
-
YUL
2 stops11h 16m
Multiple Airlines
Mon 3/238:00 am
YUL
-
SDF
1 stop28h 19m
Multiple Airlines
Deal found 1/27$392
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1312:03 pm
SDF
-
YUL
1 stop12h 27m
Multiple Airlines
Mon 3/238:00 am
YUL
-
SDF
1 stop28h 19m
Multiple Airlines
Deal found 1/27$410
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 3/61:19 pm
SDF
-
YYZ
2 stops9h 21m
Multiple Airlines
Mon 3/93:40 pm
YYZ
-
SDF
1 stop22h 58m
Multiple Airlines
Deal found 1/28$413
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1612:03 pm
SDF
-
YUL
2 stops36h 35m
Multiple Airlines
Sun 3/224:35 pm
YUL
-
SDF
1 stop18h 33m
Multiple Airlines
Deal found 1/27$417
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:33 am
SDF
-
YYZ
1 stop11h 03m
American Airlines
Wed 4/811:44 am
YYZ
-
SDF
1 stop9h 44m
American Airlines
Deal found 1/27$423
This American Airlines deal was found by Cheapflights users on 1/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/107:05 pm
SDF
-
YUL
1 stop16h 39m
American Airlines
Tue 4/1412:30 pm
YUL
-
SDF
1 stop10h 57m
American Airlines
Deal found 1/28$434

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$311
(Kiwi.com)

One-way from

$119
(Kiwi.com)

Popular in

December

Cheapest in

May
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. 38% potential increase in price ($358 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($40 potential savings vs. average RT price).
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 January 29, 2026.
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

Tue 2/24

3:33 pm-11:28 am

1 stop19h 55m

Toronto Pearson Intl

Tue 3/3

7:15 am-12:21 pm

1 stop29h 06m

$311

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Mon 3/16

12:03 pm-12:38 am

2 stops36h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 3/23

8:00 am-12:19 pm

1 stop28h 19m

$367

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 4/13

12:03 pm-12:14 am

1 stop12h 11m

Toronto Pearson Intl

Wed 4/15

5:15 pm-2:38 pm

2 stops21h 23m

$384

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Thu 4/16

1:03 pm-12:14 am

1 stop11h 11m

Toronto Pearson Intl

Sun 4/19

8:00 pm-11:38 am

1 stop15h 38m

$386

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 4/1

12:03 pm-12:14 am

1 stop12h 11m

Toronto Pearson Intl

Wed 4/8

5:15 pm-1:26 pm

2 stops20h 11m

$412

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Fri 3/6

1:19 pm-10:40 pm

2 stops9h 21m

Toronto Pearson Intl

Mon 3/9

3:40 pm-2:38 pm

1 stop22h 58m

$413

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 4/1

6:33 am-5:36 pm

1 stop11h 03m

Toronto Pearson Intl

Wed 4/8

11:44 am-9:28 pm

1 stop9h 44m

$423

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 3/9

1:19 pm-12:14 am

1 stop10h 55m

Toronto Pearson Intl

Sat 3/14

11:15 pm-11:08 am

2 stops35h 53m

$435

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Sun 3/8

8:14 pm-2:53 pm

1 stop18h 39m

Toronto Pearson Intl

Thu 3/12

7:15 am-11:08 am

2 stops27h 53m

$441

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 3/2

1:19 pm-12:14 am

1 stop10h 55m

Toronto Pearson Intl

Fri 3/6

7:15 am-11:05 am

3 stops27h 50m

$441

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 46 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 January is currently the most expensive (average of $353). 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.

How much does it cost to fly round-trip from Louisville to Region of Ontario?

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 January 29, 2026.
See what other customers who have flown with Delta, American Airlines, 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
8,127 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

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
8,127 reviews
Delta
7.9
Good
8,127 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

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.
American Airlines
7.2
Good
11,206 reviews
Delta
7.9
Good
8,127 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

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
3,253 reviews
Delta
7.9
Good
8,127 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

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 American Airlines, Delta, and Air Canada fly from Louisville to Region of Ontario in about 11h 05m. The time it takes to get you to your destination can typically vary by up to 5h 34m. The distance from Louisville to Region of Ontario is about 412 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, 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 January is currently the most expensive (average of $353). 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$370Average$496FlexibilityNo cancel feeOn-timeN/A

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