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Cheap flights from Ontario to Louisville from $173

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Louisville departing on 5/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Louisville

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:10 pm - 10:50 pm
YOW
-
SDF
7h 40m
1 stop
United Airlines Logo
6:00 am - 10:03 am
SDF
-
YOW
4h 03m
1 stop
$288United Airlines
Mon, Jun 1 - Thu, Jun 4
United Airlines Logo
5:50 pm - 10:50 pm
YOW
-
SDF
5h 00m
1 stop
United Airlines Logo
6:00 am - 10:03 am
SDF
-
YOW
4h 03m
1 stop
$304United Airlines
Mon, Jun 1 - Thu, Jun 4
Multiple Airlines Logo
1:30 pm - 9:28 am
YYZ
-
SDF
19h 58m
1 stop
Multiple Airlines Logo
10:33 am - 8:55 pm
SDF
-
YYZ
10h 22m
1 stop
$315Multiple Airlines
Thu, May 7 - Thu, May 14
Air Canada Logo
9:05 am - 10:50 pm
YOW
-
SDF
13h 45m
2 stops
Air Canada Logo
6:00 am - 10:03 am
SDF
-
YOW
4h 03m
1 stop
$344Air Canada
Mon, Jun 1 - Thu, Jun 4
Multiple Airlines Logo
7:45 am - 9:03 am
YYZ
-
SDF
25h 18m
1 stop
Multiple Airlines Logo
8:06 pm - 8:55 pm
SDF
-
YYZ
24h 49m
2 stops
$359Multiple Airlines
Wed, May 6 - Wed, May 13
Air Canada Logo
9:05 am - 10:50 pm
YOW
-
SDF
13h 45m
2 stops
Air Canada Logo
6:00 am - 10:03 am
SDF
-
YOW
4h 03m
1 stop
$360Air Canada
Mon, Jun 1 - Thu, Jun 4
Delta Logo
6:55 am - 1:51 pm
YOW
-
SDF
6h 56m
2 stops
Delta Logo
7:50 am - 5:35 pm
SDF
-
YOW
9h 45m
2 stops
$382Delta
Tue, May 26 - Fri, May 29
Delta Logo
6:15 pm - 11:59 pm
YUL
-
SDF
5h 44m
1 stop
Delta Logo
5:45 pm - 11:56 pm
SDF
-
YUL
6h 11m
1 stop
$431Delta
Tue, Sep 15 - Tue, Sep 22
American Airlines Logo
7:55 am - 12:45 pm
YUL
-
SDF
4h 50m
1 stop
American Airlines Logo
8:55 am - 10:44 pm
SDF
-
YUL
13h 49m
1 stop
$441American Airlines
Tue, Sep 15 - Tue, Sep 22
American Airlines Logo
7:51 am - 6:37 pm
YUL
-
SDF
10h 46m
1 stop
American Airlines Logo
6:25 pm - 12:29 pm
SDF
-
YUL
18h 04m
1 stop
$454American Airlines
Sat, May 30 - Fri, Jul 3

United Airlines flights from Region of Ontario to Louisville

Our best United Airlines deals on Region of Ontario to Louisville flight tickets
United Airlines
Jun 1
YOW3:10 pmOttawa
7h 40m
1 stop
SDF10:50 pmLouisville Intl
Jun 4
SDF6:00 amLouisville Intl
4h 03m
1 stop
YOW10:03 amOttawa
$288
United Airlines
Jun 1
YOW5:50 pmOttawa
5h 00m
1 stop
SDF10:50 pmLouisville Intl
Jun 4
SDF6:00 amLouisville Intl
4h 03m
1 stop
YOW10:03 amOttawa
$304
United Airlines
May 26
YOW5:20 pmOttawa
6h 39m
1 stop
SDF11:59 pmLouisville Intl
May 29
SDF6:00 amLouisville Intl
4h 03m
1 stop
YOW10:03 amOttawa
$316

Air Canada flights from Region of Ontario to Louisville

Our best Air Canada deals on Region of Ontario to Louisville flight tickets
Air Canada
Jun 1
YOW9:05 amOttawa
13h 45m
2 stops
SDF10:50 pmLouisville Intl
Jun 4
SDF6:00 amLouisville Intl
4h 03m
1 stop
YOW10:03 amOttawa
$344
Air Canada
Jun 1
YOW9:05 amOttawa
13h 45m
2 stops
SDF10:50 pmLouisville Intl
Jun 4
SDF6:00 amLouisville Intl
4h 03m
1 stop
YOW10:03 amOttawa
$360
Air Canada
Jun 1
YOW9:00 amOttawa
13h 30m
2 stops
SDF10:30 pmLouisville Intl
Jun 4
SDF6:00 amLouisville Intl
4h 03m
1 stop
YOW10:03 amOttawa
$402

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Louisville 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, momondo users made 832,500 searches. Data last updated April 10, 2026.
Use the filters below to find and compare flights from Ontario to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 6/1

3:10 pm-10:50 pm

1 stop7h 40m

Louisville Intl

Thu 6/4

6:00 am-10:03 am

1 stop4h 03m

$288
Quickest round-trip

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 6/1

5:50 pm-10:50 pm

1 stop5h 00m

Louisville Intl

Thu 6/4

6:00 am-10:03 am

1 stop4h 03m

$304

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Thu 5/7

1:30 pm-9:28 am

1 stop19h 58m

Louisville Intl

Thu 5/14

10:33 am-8:55 pm

1 stop10h 22m

$315

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 6/1

9:05 am-10:50 pm

2 stops13h 45m

Louisville Intl

Thu 6/4

6:00 am-10:03 am

1 stop4h 03m

$344

TorontoLouisville

YYZ - SDF

YYZSDF

Toronto Pearson Intl

Wed 5/6

7:45 am-9:03 am

1 stop25h 18m

Louisville Intl

Wed 5/13

8:06 pm-8:55 pm

2 stops24h 49m

$359

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Mon 6/1

9:05 am-10:50 pm

2 stops13h 45m

Louisville Intl

Thu 6/4

6:00 am-10:03 am

1 stop4h 03m

$360

OttawaLouisville

YOW - SDF

YOWSDF

Ottawa

Tue 5/26

6:55 am-1:51 pm

2 stops6h 56m

Louisville Intl

Fri 5/29

7:50 am-5:35 pm

2 stops9h 45m

$382

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Tue 9/15

6:15 pm-11:59 pm

1 stop5h 44m

Louisville Intl

Tue 9/22

5:45 pm-11:56 pm

1 stop6h 11m

$431

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Tue 9/15

7:55 am-12:45 pm

1 stop4h 50m

Louisville Intl

Tue 9/22

8:55 am-10:44 pm

1 stop13h 49m

$441

MontrealLouisville

YUL - SDF

YULSDF

Montreal Pierre Elliott Trudeau Intl

Sat 5/30

7:51 am-6:37 pm

1 stop10h 46m

Louisville Intl

Fri 7/3

6:25 pm-12:29 pm

1 stop18h 04m

$454

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Louisville from

How to get the cheapest flight ticket from Region of Ontario to Louisville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Region of Ontario to Louisville flights?

You could potentially save up to 46% on your flight if you consider stops on a Region of Ontario to Louisville flight.

Cheap Region of Ontario to Louisville flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Louisville

Fastest flight time

3h 44m

Direct flights

None
The fastest flight from Region of Ontario to Louisville takes 3h 44m
There are no direct flights from Region of Ontario to Louisville. There are no popular flight routes from Region of Ontario to Louisville.
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Frequently asked questions about flying from Ontario to Louisville

  • When did momondo last update prices for flights from Ontario to Louisville Intl Airport?

    Prices for flights from Ontario to Louisville Intl Airport refresh daily.

  • How many operators does momondo search for flights from Ontario to Louisville Intl Airport?

  • How old do you have to be to fly from Ontario to Louisville Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Louisville Intl Airport.

  • What documentation or ID do you need to fly to Louisville Intl Airport?

    The travel and health documents required for your trip to Louisville Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Louisville Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Region of Ontario to Louisville

Compare and see reviews for airlines that fly from Region of Ontario to Louisville with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $296Free CancellationRating
7.4
9,562 reviews
Search United Airlines flights
American AirlinesPriceFrom $331Free CancellationRating
7.1
11,564 reviews
Search American Airlines flights

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
French Lick
Elizabethtown
West Baden Springs
Jeffersonville
Bardstown
New Albany
Shepherdsville
Corydon
Brandenburg
Elizabeth
Charlestown
Springfield
Georgetown

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Louisville?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Louisville from Ontario.

Can I find flights from Ontario to Louisville with flexible booking policies on momondo?

momondo does allow users to show only those flights to Louisville from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Louisville?

momondo provides multiple filters to help you find the best flight to Louisville from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Louisville right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Louisville, momondo offers a useful price alert feature which will track prices for flights to Louisville from Ontario and alert you when they change.

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