What is the cheapest airline that flies from Louisville Intl to Ontario?

Delta, American Airlines, and WestJet are the most popular carriers operating from Louisville Intl to Ontario

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

Prices for flights from Louisville Intl Airport to Ontario are refreshed on a daily basis.

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

The number of operators available for flights from Louisville Intl Airport to Ontario is 1 as of May 2026.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Louisville Intl Airport to Ontario.

What documentation or ID do you need to fly to Ontario?

The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$184 Cheap Flights from Louisville to Ontario in 2026

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Find the cheapest flights from Louisville to Ontario

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:10 am - 9:35 pm

SDF

YOW

14h 25m

1 stop

5:25 pm - 11:49 pm

YOW

SDF

6h 24m

1 stop

$421United Airlines

Tue, May 26 - Sat, May 30

7:08 pm - 7:05 pm

SDF

YYZ

23h 57m

1 stop

7:35 am - 8:42 pm

YYZ

SDF

13h 07m

1 stop

$429Multiple Airlines

Mon, Oct 26 - Fri, Oct 30

10:00 am - 2:17 pm

SDF

YOW

4h 17m

1 stop

10:44 am - 11:56 pm

YOW

SDF

13h 12m

1 stop

$431United Airlines

Wed, Jun 3 - Thu, Jun 4

8:48 pm - 2:05 pm

SDF

YYZ

17h 17m

1 stop

1:30 pm - 10:32 am

YYZ

SDF

21h 02m

2 stops

$436Multiple Airlines

Fri, Jul 31 - Sat, Aug 8

9:28 pm - 8:40 pm

SDF

YYZ

23h 12m

1 stop

4:45 pm - 7:58 pm

YYZ

SDF

27h 13m

2 stops

$466Multiple Airlines

Fri, Jul 10 - Thu, Jul 23

9:10 pm - 2:05 pm

SDF

YYZ

16h 55m

1 stop

1:30 pm - 8:36 am

YYZ

SDF

43h 06m

2 stops

$485Multiple Airlines

Mon, Jun 8 - Mon, Jun 15

6:01 am - 4:48 pm

SDF

YYZ

10h 47m

1 stop

11:01 am - 8:25 pm

YYZ

SDF

9h 24m

1 stop

$514American Airlines

Wed, May 27 - Sat, May 30

6:00 am - 2:17 pm

SDF

YOW

8h 17m

1 stop

7:00 am - 5:03 pm

YOW

SDF

10h 03m

2 stops

$519Air Canada

Wed, Jun 3 - Thu, Jun 4

6:00 am - 1:05 pm

SDF

YOW

7h 05m

2 stops

9:10 am - 7:18 pm

YOW

SDF

10h 08m

2 stops

$559Air Canada

Wed, Jun 3 - Thu, Jun 4

6:56 pm - 11:44 am

SDF

YUL

16h 48m

1 stop

12:30 pm - 10:19 pm

YUL

SDF

9h 49m

1 stop

$617American Airlines

Fri, May 29 - Wed, Jun 10

WestJet flights from Louisville to Region of Ontario

Our best WestJet deals on Louisville to Region of Ontario flight tickets

WestJet

Aug 6

SDF11:17 amLouisville Intl

6h 02m

1 stop

YYZ5:19 pmToronto Pearson Intl

Aug 9

YYZ6:00 amToronto Pearson Intl

4h 32m

1 stop

SDF10:32 amLouisville Intl

$622

WestJet

May 23

SDF4:28 pmLouisville Intl

7h 13m

1 stop

YUL11:41 pmMontreal Pierre Elliott Trudeau Intl

May 29

YUL6:51 pmMontreal Pierre Elliott Trudeau Intl

15h 29m

1 stop

SDF10:20 amLouisville Intl

$623

WestJet

Jun 11

SDF4:40 pmLouisville Intl

7h 15m

1 stop

YUL11:55 pmMontreal Pierre Elliott Trudeau Intl

Jun 16

YUL5:07 pmMontreal Pierre Elliott Trudeau Intl

4h 08m

1 stop

SDF9:15 pmLouisville Intl

$626

American Airlines flights from Louisville to Region of Ontario

Our best American Airlines deals on Louisville to Region of Ontario flight tickets

American Airlines

May 27

SDF6:01 amLouisville Intl

10h 47m

1 stop

YYZ4:48 pmToronto Pearson Intl

May 30

YYZ11:01 amToronto Pearson Intl

9h 24m

1 stop

SDF8:25 pmLouisville Intl

$514

American Airlines

May 27

SDF6:01 amLouisville Intl

10h 47m

1 stop

YYZ4:48 pmToronto Pearson Intl

Jun 3

YYZ11:01 amToronto Pearson Intl

10h 40m

1 stop

SDF9:41 pmLouisville Intl

$565

American Airlines

Jun 6

SDF6:01 amLouisville Intl

10h 47m

1 stop

YYZ4:48 pmToronto Pearson Intl

Jun 12

YYZ11:01 amToronto Pearson Intl

10h 40m

1 stop

SDF9:41 pmLouisville Intl

$568

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Tue 5/26

7:10 am-9:35 pm

1 stop14h 25m

Ottawa

Sat 5/30

5:25 pm-11:49 pm

1 stop6h 24m

$421

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 10/26

7:08 pm-7:05 pm

1 stop23h 57m

Toronto Pearson Intl

Fri 10/30

7:35 am-8:42 pm

1 stop13h 07m

$429

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 6/3

10:00 am-2:17 pm

1 stop4h 17m

Ottawa

Thu 6/4

10:44 am-11:56 pm

1 stop13h 12m

$431

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Fri 7/31

8:48 pm-2:05 pm

1 stop17h 17m

Toronto Pearson Intl

Sat 8/8

1:30 pm-10:32 am

2 stops21h 02m

$436

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Fri 7/10

9:28 pm-8:40 pm

1 stop23h 12m

Toronto Pearson Intl

Thu 7/23

4:45 pm-7:58 pm

2 stops27h 13m

$466

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Mon 6/8

9:10 pm-2:05 pm

1 stop16h 55m

Toronto Pearson Intl

Mon 6/15

1:30 pm-8:36 am

2 stops43h 06m

$485

LouisvilleToronto

SDF - YYZ

SDFYYZ

Louisville Intl

Wed 5/27

6:01 am-4:48 pm

1 stop10h 47m

Toronto Pearson Intl

Sat 5/30

11:01 am-8:25 pm

1 stop9h 24m

$514

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 6/3

6:00 am-2:17 pm

1 stop8h 17m

Ottawa

Thu 6/4

7:00 am-5:03 pm

2 stops10h 03m

$519

Quickest round-trip

LouisvilleOttawa

SDF - YOW

SDFYOW

Louisville Intl

Wed 6/3

6:00 am-1:05 pm

2 stops7h 05m

Ottawa

Thu 6/4

9:10 am-7:18 pm

2 stops10h 08m

$559

LouisvilleMontreal

SDF - YUL

SDFYUL

Louisville Intl

Fri 5/29

6:56 pm-11:44 am

1 stop16h 48m

Montreal Pierre Elliott Trudeau Intl

Wed 6/10

12:30 pm-10:19 pm

1 stop9h 49m

$617

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Prices

Airlines

What is the cheapest month to fly to Region of Ontario?

The month of May is, on average, the cheapest month to fly to Region of Ontario from Louisville, with most prices found around $143. If you aren’t able to travel during the month of May, then book flights to Region of Ontario from Louisville during June instead. Flights to Region of Ontario in June, while not as cheap as those in May, still average around $149.

Cheap Louisville to Region of Ontario flight deals and tips

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

Fastest flight time	3h 29m
Direct flights	None

The fastest flight from Louisville to Region of Ontario takes 3h 29m

There are no direct flights from Louisville to Region of Ontario. There are no popular flight routes from Louisville to Region of Ontario.

Search flight deals

Frequently asked questions about flying from Louisville to Ontario

When did momondo last update prices for flights from Louisville Intl Airport to Ontario?
Prices for flights from Louisville Intl Airport to Ontario are refreshed on a daily basis.
How many operators does momondo search for flights from Louisville Intl Airport to Ontario?
The number of operators available for flights from Louisville Intl Airport to Ontario is 1 as of May 2026.
How old do you have to be to fly from Louisville Intl Airport to Ontario?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Louisville Intl Airport to Ontario.
What documentation or ID do you need to fly to Ontario?
The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Louisville to Region of Ontario

Compare and see reviews for airlines that fly from Louisville to Region of Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $341	Free Cancellation	Rating 7.4 9,699 reviews		Search United Airlines flights

Why use momondo?

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

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 Ontario from Louisville.

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

Yes. momondo enables you to select and highlight flights to Ontario from Louisville with this policy.

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

Once you have performed a search for Louisville to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Louisville to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.