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Cheap flights from Louisville to Ontario from C$ 231

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — YYZ
12 Apr — 19 Apr1
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 13 March 2026.

Sun 29/39:07 a.m.
SDF
-
YOW
1 stop12h 28m
United Airlines
Tue 5/57:30 p.m.
YOW
-
SDF
1 stop4h 29m
United Airlines
Deal found 8/3C$ 533
Wed 1/49:07 a.m.
SDF
-
YOW
1 stop8h 00m
United Airlines
Sat 2/56:00 a.m.
YOW
-
SDF
1 stop8h 47m
United Airlines
Deal found 9/3C$ 547
Tue 21/410:00 a.m.
SDF
-
YOW
1 stop7h 07m
United Airlines
Wed 22/410:00 a.m.
YOW
-
SDF
1 stop4h 47m
United Airlines
Deal found 10/3C$ 563
Mon 30/39:13 p.m.
SDF
-
YOW
1 stop27h 12m
Multiple Airlines
Tue 5/56:25 p.m.
YOW
-
SDF
2 stops38h 38m
Multiple Airlines
Deal found 8/3C$ 580
Mon 30/39:13 p.m.
SDF
-
YOW
1 stop27h 12m
Multiple Airlines
Wed 29/49:30 a.m.
YOW
-
SDF
1 stop28h 01m
Multiple Airlines
Deal found 8/3C$ 599
Fri 1/511:27 a.m.
SDF
-
YYZ
1 stop9h 48m
Delta
Wed 13/57:55 a.m.
YYZ
-
SDF
1 stop8h 44m
Delta
Deal found 8/3C$ 611
Thu 30/46:06 p.m.
SDF
-
YYZ
1 stop17h 39m
Multiple Airlines
Tue 5/57:20 a.m.
YYZ
-
SDF
2 stops25h 16m
Multiple Airlines
Deal found 11/3C$ 615
Wed 1/412:09 p.m.
SDF
-
YUL
1 stop9h 12m
Multiple Airlines
Mon 6/411:10 a.m.
YUL
-
SDF
3 stops24h 37m
Multiple Airlines
Deal found 10/3C$ 616
Tue 31/312:42 p.m.
SDF
-
YOW
1 stop11h 43m
Multiple Airlines
Tue 5/56:25 p.m.
YOW
-
SDF
2 stops38h 38m
Multiple Airlines
Deal found 8/3C$ 619
Thu 9/42:26 p.m.
SDF
-
YUL
2 stops25h 59m
Multiple Airlines
Thu 16/44:25 p.m.
YUL
-
SDF
1 stop26h 33m
Multiple Airlines
Deal found 10/3C$ 620
Fri 10/47:48 p.m.
SDF
-
YYZ
1 stop27h 32m
Multiple Airlines
Mon 13/43:40 p.m.
YYZ
-
SDF
1 stop20h 07m
Multiple Airlines
Deal found 8/3C$ 620
Sat 11/47:01 p.m.
SDF
-
YUL
1 stop16h 43m
American Airlines
Wed 15/412:30 p.m.
YUL
-
SDF
1 stop9h 00m
American Airlines
Deal found 7/3C$ 624

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 13 March 2026.

Round-trip from

C$ 533

One-way from

C$ 231

Popular in

December

Cheapest in

April

Average price

C$ 599
United Airlines
  • United Airlines
  • 29/3-5/5
  • 2 total stops
  • 16h 57m total
  • Louisville to Ontario
Search Deals
United Airlines
  • United Airlines
  • 24/4
  • 1 total stop
  • 7h 45m total
  • Louisville to Ontario
Search Deals
Highest demand for flights based on searches. 41% potential increase in price (C$ 700 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (C$ 79 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 13 March 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

Sun 29/3

9:07 a.m.-9:35 p.m.

1 stop12h 28m

Ottawa

Sat 2/5

5:25 p.m.-10:30 p.m.

1 stop5h 05m

C$ 533
Quickest round-trip

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Tue 21/4

9:55 a.m.-2:22 p.m.

1 stop4h 27m

Ottawa

Wed 22/4

5:50 p.m.-11:12 p.m.

1 stop5h 22m

C$ 533

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 1/4

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

1 stop8h 00m

Ottawa

Sat 2/5

6:00 a.m.-2:47 p.m.

1 stop8h 47m

C$ 547

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Fri 1/5

11:27 a.m.-9:15 p.m.

1 stop9h 48m

Toronto Pearson Intl

Wed 13/5

7:55 a.m.-4:39 p.m.

1 stop8h 44m

C$ 611

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Sat 8/8

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

1 stop4h 59m

Ottawa

Thu 13/8

6:00 p.m.-10:57 p.m.

1 stop4h 57m

C$ 633

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Tue 21/4

7:20 a.m.-5:07 p.m.

1 stop9h 47m

Ottawa

Wed 22/4

5:45 a.m.-4:41 p.m.

2 stops10h 56m

C$ 648

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 8/4

9:07 a.m.-1:59 p.m.

1 stop4h 52m

Ottawa

Wed 15/4

5:25 p.m.-11:59 p.m.

1 stop6h 34m

C$ 648

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 11/5

7:48 p.m.-2:05 p.m.

1 stop18h 17m

Toronto Pearson Intl

Thu 14/5

11:15 p.m.-6:58 p.m.

2 stops19h 43m

C$ 657

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Fri 22/5

9:00 a.m.-9:35 p.m.

1 stop12h 35m

Ottawa

Tue 26/5

5:20 p.m.-11:59 p.m.

1 stop6h 39m

C$ 671

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Sat 6/6

8:06 p.m.-6:15 p.m.

2 stops22h 09m

Montreal Pierre Elliott Trudeau Intl

Sat 13/6

6:45 a.m.-5:04 p.m.

1 stop10h 19m

C$ 672

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

Showing 1-10 of 38 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, April is the cheapest month in which you can book a flight from Louisville to Region of Ontario (average of C$ 263). Flying from Louisville to Region of Ontario in October is currently the most expensive (average of C$ 552). 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.

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 and Delta fly from Louisville to Region of Ontario in about 9h 48m. The time it takes to get you to your destination can typically vary by up to 2h 40m. Louisville and Region of Ontario are separated by a distance of 798 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 - Ottawa or Louisville Intl - Toronto Pearson Intl.

  • 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 C$ 263). Flying from Louisville to Region of Ontario in October is currently the most expensive (average of C$ 552). 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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