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Cheap flights from Louisville to Ontario from C$ 235

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
29 May — 5 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Louisville to Ontario

Enter your travel dates to find the best prices.

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 29 April 2026.

Thu 14/55:50 a.m.
SDF
-
YOW
1 stop4h 13m
United Airlines
Mon 18/510:00 a.m.
YOW
-
SDF
1 stop13h 59m
United Airlines
Deal found 26/4C$ 495
Tue 12/55:50 a.m.
SDF
-
YOW
1 stop4h 13m
United Airlines
Fri 15/52:40 p.m.
YOW
-
SDF
1 stop5h 02m
United Airlines
Deal found 28/4C$ 509
Sat 15/89:00 a.m.
SDF
-
YOW
1 stop8h 07m
United Airlines
Wed 19/85:20 p.m.
YOW
-
SDF
1 stop6h 45m
United Airlines
Deal found 27/4C$ 516
Fri 10/79:28 p.m.
SDF
-
YYZ
1 stop23h 12m
Multiple Airlines
Mon 13/79:30 a.m.
YYZ
-
SDF
1 stop10h 28m
Multiple Airlines
Deal found 28/4C$ 520
Sun 2/85:20 a.m.
SDF
-
YOW
1 stop8h 39m
United Airlines
Wed 12/82:48 p.m.
YOW
-
SDF
1 stop8h 09m
United Airlines
Deal found 27/4C$ 530
Thu 5/119:09 p.m.
SDF
-
YYZ
1 stop20h 06m
Multiple Airlines
Mon 9/119:35 a.m.
YYZ
-
SDF
1 stop8h 28m
Multiple Airlines
Deal found 26/4C$ 551
Wed 27/56:01 a.m.
SDF
-
YYZ
1 stop10h 47m
American Airlines
Wed 3/611:01 a.m.
YYZ
-
SDF
1 stop10h 40m
American Airlines
Deal found 29/4C$ 598
Thu 21/510:33 a.m.
SDF
-
YYZ
1 stop10h 27m
Multiple Airlines
Mon 25/54:45 p.m.
YYZ
-
SDF
2 stops42h 49m
Multiple Airlines
Deal found 25/4C$ 605
Thu 14/55:50 a.m.
SDF
-
YOW
1 stop4h 13m
Air Canada
Mon 18/59:05 a.m.
YOW
-
SDF
2 stops13h 17m
Air Canada
Deal found 26/4C$ 609
Mon 8/69:10 p.m.
SDF
-
YYZ
1 stop16h 55m
Multiple Airlines
Sat 13/66:30 a.m.
YYZ
-
SDF
1 stop26h 58m
Multiple Airlines
Deal found 25/4C$ 624
Fri 5/69:10 p.m.
SDF
-
YUL
2 stops27h 15m
Multiple Airlines
Wed 10/66:50 p.m.
YUL
-
SDF
1 stop5h 42m
Multiple Airlines
Deal found 29/4C$ 627
Thu 11/610:33 a.m.
SDF
-
YYZ
1 stop10h 22m
Multiple Airlines
Thu 18/66:30 a.m.
YYZ
-
SDF
1 stop9h 28m
Multiple Airlines
Deal found 27/4C$ 627

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 29 April 2026.

Round-trip from

C$ 495

One-way from

C$ 235

Popular in

December

Cheapest in

May

Average price

C$ 717
United Airlines
  • United Airlines
  • 14/5-18/5
  • 2 total stops
  • 8h 42m total
  • Louisville to Ontario
Search Deals
10/6
  • 10/6
  • 2 total stops
  • 33h 35m total
  • Louisville to Ontario
Search Deals
Highest demand for flights based on searches. 33% potential increase in price (C$ 578 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 65 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 629,999 searches. Data last updated 29 April 2026.
Use the filters below to find and compare flights from Louisville to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Thu 14/5

5:50 a.m.-10:03 a.m.

1 stop4h 13m

Ottawa

Mon 18/5

10:00 a.m.-11:59 p.m.

1 stop13h 59m

C$ 495

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Sat 15/8

9:00 a.m.-5:07 p.m.

1 stop8h 07m

Ottawa

Wed 19/8

5:20 p.m.-12:05 a.m.

1 stop6h 45m

C$ 516

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 14/10

11:00 a.m.-5:21 p.m.

1 stop6h 21m

Ottawa

Sat 17/10

5:25 p.m.-12:05 a.m.

1 stop6h 40m

C$ 516

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 27/5

6:01 a.m.-4:48 p.m.

1 stop10h 47m

Toronto Pearson Intl

Wed 3/6

11:01 a.m.-9:41 p.m.

1 stop10h 40m

C$ 598

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Tue 12/5

7:15 a.m.-5:11 p.m.

2 stops9h 56m

Ottawa

Fri 15/5

5:05 a.m.-8:17 p.m.

2 stops15h 12m

C$ 635

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Sat 15/8

9:00 a.m.-1:59 p.m.

1 stop4h 59m

Ottawa

Wed 19/8

12:15 p.m.-7:19 p.m.

2 stops7h 04m

C$ 640

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Thu 17/9

9:09 p.m.-2:55 p.m.

1 stop17h 46m

Toronto Pearson Intl

Sun 20/9

9:30 a.m.-5:25 p.m.

1 stop7h 55m

C$ 647

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Sat 13/6

10:33 a.m.-8:55 p.m.

1 stop10h 22m

Toronto Pearson Intl

Sat 20/6

6:05 a.m.-9:55 a.m.

1 stop3h 50m

C$ 658

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Fri 15/5

7:48 p.m.-7:35 p.m.

2 stops23h 47m

Toronto Pearson Intl

Fri 5/6

9:30 a.m.-8:20 p.m.

1 stop10h 50m

C$ 664

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 22/6

9:05 p.m.-4:45 p.m.

2 stops19h 40m

Toronto Pearson Intl

Thu 25/6

4:10 p.m.-9:15 p.m.

1 stop5h 05m

C$ 676

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 41 resultsSorted by cheapest first
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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, May is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of C$ 196). Flying from Louisville to Region of Ontario in November is currently the most expensive (average of C$ 1,152). 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?

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?

    Most people fly from Louisville Intl (SDF) if they book a flight from Louisville to Ontario. Louisville Intl is conveniently located just 8.5 km from Louisville’s city centre.

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

    Airlines like United Airlines, American Airlines, and Delta fly from Louisville to Region of Ontario in about 4h 13m. The time it takes to get you to your destination can typically vary by up to 8h 30m. Louisville and Region of Ontario are separated by a distance of 1151 km. This flight may include one or multiple stops.

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

    The most popular route from Louisville to Region of Ontario is Louisville Intl - Montreal Pierre Elliott Trudeau Intl. You may also consider Louisville Intl - Toronto Pearson Intl or 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, May is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of C$ 196). Flying from Louisville to Region of Ontario in November is currently the most expensive (average of C$ 1,152). 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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