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$141+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$317
(Kiwi.com)

One-way from

$141
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$384
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. 13% potential increase in price ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($25 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 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 June 12, 2025.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/99:46 amSDF - YYZ
1 stop28h 19mMultiple Airlines
Wed 7/167:25 pmYYZ - SDF
1 stop16h 02mMultiple Airlines
Deal found 6/11$317
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/267:13 pmSDF - YUL
2 stops29h 24mMultiple Airlines
Sat 8/21:10 pmYUL - SDF
1 stop22h 17mMultiple Airlines
Deal found 6/11$392
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/263:36 pmSDF - YOW
3 stops32h 46mMultiple Airlines
Sat 8/212:00 pmYOW - SDF
1 stop23h 27mMultiple Airlines
Deal found 6/11$429
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:00 amSDF - YYZ
1 stop7h 38mUnited Airlines
Sun 10/129:00 pmYYZ - SDF
1 stop13h 01mUnited Airlines
Deal found 6/11$444
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/225:18 pmSDF - YUL
1 stop5h 14mAmerican Airlines
Thu 9/2512:30 pmYUL - SDF
1 stop10h 29mAmerican Airlines
Deal found 6/10$492
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/233:39 pmSDF - YYZ
2 stops7h 25mAmerican Airlines
Wed 6/2511:01 amYYZ - SDF
1 stop10h 49mAmerican Airlines
Deal found 6/12$535
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 12/107:30 amSDF - YUL
1 stop11h 17mUnited Airlines
Sun 12/146:50 pmYUL - SDF
1 stop27h 19mUnited Airlines
Deal found 6/10$579
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.
Wed 10/810:45 amSDF - YUL
2 stops10h 41mDelta
Sat 10/186:00 amYUL - SDF
1 stop7h 39mDelta
Deal found 6/10$592
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/274:31 pmSDF - YXU
3 stops26h 38mMultiple Airlines
Sun 8/36:00 amYXU - SDF
3 stops31h 55mMultiple Airlines
Deal found 6/12$635
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:20 amSDF - YUL
1 stop4h 55mWestJet
Sun 11/306:15 pmYUL - SDF
1 stop5h 41mWestJet
Deal found 6/10$689
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/176:00 amSDF - YUL
2 stops5h 59mAir Canada
Sun 8/243:41 pmYUL - SDF
1 stop7h 17mAir Canada
Deal found 6/12$726
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.
Sat 10/257:00 amSDF - YXU
2 stops14h 27mUnited Airlines
Wed 10/295:45 amYXU - SDF
2 stops14h 29mUnited Airlines
Deal found 6/12$766

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 June 12, 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

Wed 7/9

9:46 am-2:05 pm

1 stop28h 19m

Toronto Pearson Intl

Wed 7/16

7:25 pm-11:27 am

1 stop16h 02m

$317

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Sat 7/26

7:13 pm-12:37 am

2 stops29h 24m

Montreal Pierre Elliott Trudeau Intl

Sat 8/2

1:10 pm-11:27 am

1 stop22h 17m

$392

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Sat 7/26

3:36 pm-12:22 am

3 stops32h 46m

Ottawa

Sat 8/2

12:00 pm-11:27 am

1 stop23h 27m

$429

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 10/8

7:00 am-2:38 pm

1 stop7h 38m

Toronto Pearson Intl

Sun 10/12

9:00 pm-10:01 am

1 stop13h 01m

$444

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Mon 9/22

5:18 pm-10:32 pm

1 stop5h 14m

Montreal Pierre Elliott Trudeau Intl

Thu 9/25

12:30 pm-10:59 pm

1 stop10h 29m

$492

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 6/23

8:15 am-2:55 pm

1 stop6h 40m

Toronto Pearson Intl

Wed 6/25

11:01 am-9:50 pm

1 stop10h 49m

$525

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Sat 8/23

9:05 am-5:26 pm

1 stop8h 21m

Montreal Pierre Elliott Trudeau Intl

Tue 9/23

1:20 pm-10:24 pm

1 stop9h 04m

$586

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Wed 10/8

10:45 am-9:26 pm

2 stops10h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 10/18

6:00 am-1:39 pm

1 stop7h 39m

$592

LouisvilleLondon

SDF - YXU

SDFYXU

Louisville Intl

Sun 7/27

4:31 pm-7:09 pm

3 stops26h 38m

London

Sun 8/3

6:00 am-1:55 pm

3 stops31h 55m

$635

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Wed 11/26

7:20 am-12:15 pm

1 stop4h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 11/30

6:15 pm-11:56 pm

1 stop5h 41m

$689

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 19 results
1
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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 July 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 June 12, 2025.
To help decide which airline to fly from Louisville to Ontario, see what other customers have to say about Delta, United Airlines and American Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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 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.

  • What are the cheapest airlines to fly from Louisville to Region of Ontario one-way?

    One-way options have recently been found by users for as low as $141 on American Airlines. Other airlines that offer cheap prices include United Airlines from $169 and Air Canada from $310 one-way.

  • 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 July 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 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$276Average$386FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$276Average$536FlexibilityNo cancel feeOn-time69%
DeltaCheapest$312Average$439FlexibilityNo cancel feeOn-timeN/A
WestJetCheapest$337Average$563FlexibilityNo cancel feeOn-time60%

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