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Ontario

$73+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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 septiembre 11, 2025.

Round-trip from

$286
(Kiwi.com)

One-way from

$73
(Trip.com)

Popular in

December

Cheapest in

November

Average price

$591
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. 2% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/247:15 amSDF - YYZ
1 stop15h 25mMultiple Airlines
vie. 10/317:15 amYYZ - SDF
1 stop15h 32mMultiple Airlines
Deal found 9/9$265
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/97:56 pmSDF - YYZ
1 stop22h 40mMultiple Airlines
jue. 10/167:15 amYYZ - SDF
1 stop15h 32mMultiple Airlines
Deal found 9/9$270
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/48:23 amSDF - YYZ
1 stop13h 57mMultiple Airlines
mar. 10/74:00 pmYYZ - SDF
1 stop25h 55mMultiple Airlines
Deal found 9/9$286
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/110:14 amSDF - YYZ
2 stops27h 51mMultiple Airlines
mar. 10/74:00 pmYYZ - SDF
1 stop25h 55mMultiple Airlines
Deal found 9/9$294
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/17:00 amSDF - YYZ
1 stop7h 31mAmerican Airlines
mar. 10/71:15 pmYYZ - SDF
1 stop9h 48mAmerican Airlines
Deal found 9/9$314
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/38:23 amSDF - YYZ
1 stop15h 29mMultiple Airlines
mar. 10/74:00 pmYYZ - SDF
1 stop25h 55mMultiple Airlines
Deal found 9/9$320
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/257:15 amSDF - YUL
1 stop7h 05mMultiple Airlines
sáb. 11/18:00 amYUL - SDF
1 stop10h 03mMultiple Airlines
Deal found 9/10$330
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/237:15 amSDF - YUL
1 stop7h 05mMultiple Airlines
mié. 10/296:45 amYUL - SDF
1 stop9h 51mMultiple Airlines
Deal found 9/10$360
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/257:15 amSDF - YUL
1 stop7h 05mMultiple Airlines
dom. 11/28:00 amYUL - SDF
1 stop10h 03mMultiple Airlines
Deal found 9/10$376
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/36:12 pmSDF - YUL
1 stop17h 33mAmerican Airlines
mar. 10/712:30 pmYUL - SDF
1 stop10h 33mAmerican Airlines
Deal found 9/9$393
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/257:15 amSDF - YUL
1 stop7h 05mMultiple Airlines
vie. 10/316:45 amYUL - SDF
2 stops16h 02mMultiple Airlines
Deal found 9/10$399
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/186:45 amSDF - YUL
1 stop9h 54mAmerican Airlines
sáb. 10/2512:30 pmYUL - SDF
1 stop10h 33mAmerican Airlines
Deal found 9/11$415

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 septiembre 11, 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

jue. 10/9

7:56 pm-6:36 pm

1 stop22h 40m

Toronto Pearson Intl

jue. 10/16

7:15 am-10:47 pm

1 stop15h 32m

$270

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

sáb. 10/4

8:23 am-10:20 pm

1 stop13h 57m

Toronto Pearson Intl

mar. 10/7

4:00 pm-5:55 pm

1 stop25h 55m

$286

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

vie. 10/24

2:57 pm-6:12 am

2 stops15h 15m

Toronto Pearson Intl

vie. 10/31

7:15 am-10:47 pm

1 stop15h 32m

$290

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

mié. 10/1

7:00 am-2:31 pm

1 stop7h 31m

Toronto Pearson Intl

mar. 10/7

1:15 pm-11:03 pm

1 stop9h 48m

$314

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

vie. 10/3

8:23 am-11:52 pm

1 stop15h 29m

Toronto Pearson Intl

mar. 10/7

4:00 pm-5:55 pm

1 stop25h 55m

$320

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

mié. 9/24

10:14 am-2:05 pm

2 stops27h 51m

Toronto Pearson Intl

lun. 9/29

9:35 am-10:04 pm

1 stop12h 29m

$364

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

mié. 10/1

10:14 am-2:05 pm

3 stops27h 51m

Toronto Pearson Intl

mar. 10/7

4:00 pm-4:36 pm

2 stops24h 36m

$366

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

mar. 10/21

8:45 am-5:26 pm

1 stop8h 41m

Montreal Pierre Elliott Trudeau Intl

sáb. 10/25

8:20 am-6:33 pm

1 stop10h 13m

$513

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

sáb. 11/8

9:00 am-6:40 pm

1 stop9h 40m

Montreal Pierre Elliott Trudeau Intl

lun. 11/10

9:25 am-9:59 am

1 stop24h 34m

$526

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

sáb. 10/25

7:00 am-9:29 pm

1 stop14h 29m

Montreal Pierre Elliott Trudeau Intl

vie. 10/31

6:15 pm-9:58 am

1 stop15h 43m

$526

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 34 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, January is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $243). Flying from Louisville to Region of Ontario in August is currently the most expensive (average of $348). 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 septiembre 11, 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
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
3,091 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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 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 and United Airlines fly from Louisville to Region of Ontario in about 7h 31m. The time it takes to get you to your destination can typically vary by up to 1h 10m. The distance from Louisville to Region of Ontario is about 496 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, January is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of $243). Flying from Louisville to Region of Ontario in August is currently the most expensive (average of $348). 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.
Nashville to Pearson Intl flights
Nashville to Pierre Elliott Trudeau Intl flights
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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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$183Average$567FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$276Average$537FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$276Average$385FlexibilityNo cancel feeOn-time71%
DeltaCheapest$303Average$496FlexibilityNo cancel feeOn-timeN/A

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