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Cheap flights from Ontario to Louisville from $137

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 5/5. 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
1 adult, Economy, 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.
Southwest Logo
12:40 pm - 10:30 pm
ONT
-
SDF
6h 50m
1 stop
Southwest Logo
8:25 am - 11:55 am
SDF
-
ONT
6h 30m
1 stop
$273Southwest
Wed, May 13 - Wed, May 20
American Airlines Logo
9:24 am - 11:11 pm
ONT
-
SDF
10h 47m
2 stops
American Airlines Logo
6:07 am - 10:09 am
SDF
-
ONT
7h 02m
1 stop
$299American Airlines
Wed, May 13 - Wed, May 20
Southwest Logo
12:40 pm - 12:15 am
ONT
-
SDF
8h 35m
1 stop
Southwest Logo
6:40 pm - 9:50 pm
SDF
-
ONT
6h 10m
1 stop
$300Southwest
Thu, Apr 16 - Wed, Apr 22
Southwest Logo
9:55 pm - 9:55 am
ONT
-
SDF
9h 00m
2 stops
Southwest Logo
6:40 pm - 9:50 pm
SDF
-
ONT
6h 10m
1 stop
$305Southwest
Thu, Apr 16 - Wed, Apr 22
Delta Logo
12:49 pm - 10:50 pm
ONT
-
SDF
7h 01m
1 stop
Delta Logo
6:00 am - 4:25 pm
SDF
-
ONT
13h 25m
2 stops
$307Delta
Thu, Apr 16 - Wed, Apr 22
United Airlines Logo
7:00 am - 4:41 pm
ONT
-
SDF
6h 41m
1 stop
United Airlines Logo
3:37 pm - 8:36 pm
SDF
-
ONT
7h 59m
1 stop
$327United Airlines
Sat, Apr 25 - Thu, Apr 30
American Airlines Logo
7:30 am - 4:47 pm
ONT
-
SDF
6h 17m
1 stop
American Airlines Logo
7:55 pm - 11:46 pm
SDF
-
ONT
6h 51m
1 stop
$328American Airlines
Sat, May 9 - Sat, May 16
United Airlines Logo
6:05 am - 8:16 pm
ONT
-
SDF
11h 11m
2 stops
United Airlines Logo
5:28 pm - 8:36 pm
SDF
-
ONT
6h 08m
1 stop
$332United Airlines
Sat, Apr 25 - Thu, Apr 30
Delta Logo
5:59 pm - 8:52 am
ONT
-
SDF
11h 53m
2 stops
Delta Logo
3:16 pm - 11:44 pm
SDF
-
ONT
11h 28m
2 stops
$337Delta
Sat, Apr 25 - Thu, Apr 30
American Airlines Logo
7:30 am - 4:47 pm
ONT
-
SDF
6h 17m
1 stop
American Airlines Logo
7:55 pm - 11:46 pm
SDF
-
ONT
6h 51m
1 stop
$354American Airlines
Sat, May 9 - Sat, May 16

Southwest flights from Ontario to Louisville

Our best Southwest deals on Ontario to Louisville flight tickets
Southwest
May 13
ONT12:40 pmOntario
6h 50m
1 stop
SDF10:30 pmLouisville Intl
May 20
SDF8:25 amLouisville Intl
6h 30m
1 stop
ONT11:55 amOntario
$273
Southwest
Apr 16
ONT12:40 pmOntario
8h 35m
1 stop
SDF12:15 amLouisville Intl
Apr 22
SDF6:40 pmLouisville Intl
6h 10m
1 stop
ONT9:50 pmOntario
$300
Southwest
Apr 16
ONT9:55 pmOntario
9h 00m
2 stops
SDF9:55 amLouisville Intl
Apr 22
SDF6:40 pmLouisville Intl
6h 10m
1 stop
ONT9:50 pmOntario
$305

American Airlines flights from Ontario to Louisville

Our best American Airlines deals on Ontario to Louisville flight tickets
American Airlines
May 13
ONT9:24 amOntario
10h 47m
2 stops
SDF11:11 pmLouisville Intl
May 20
SDF6:07 amLouisville Intl
7h 02m
1 stop
ONT10:09 amOntario
$299
American Airlines
May 9
ONT7:30 amOntario
6h 17m
1 stop
SDF4:47 pmLouisville Intl
May 16
SDF7:55 pmLouisville Intl
6h 51m
1 stop
ONT11:46 pmOntario
$328
American Airlines
May 9
ONT7:30 amOntario
6h 17m
1 stop
SDF4:47 pmLouisville Intl
May 16
SDF7:55 pmLouisville Intl
6h 51m
1 stop
ONT11:46 pmOntario
$354

momondo Fare Finder

 
Customize your flight search to find flights from 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 March 30, 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

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 5/13

12:40 pm-10:30 pm

1 stop6h 50m

Louisville Intl

Wed 5/20

8:25 am-11:55 am

1 stop6h 30m

$273

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 5/13

9:24 am-11:11 pm

2 stops10h 47m

Louisville Intl

Wed 5/20

6:07 am-10:09 am

1 stop7h 02m

$299

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 4/16

12:40 pm-12:15 am

1 stop8h 35m

Louisville Intl

Wed 4/22

6:40 pm-9:50 pm

1 stop6h 10m

$300

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 4/16

9:55 pm-9:55 am

2 stops9h 00m

Louisville Intl

Wed 4/22

6:40 pm-9:50 pm

1 stop6h 10m

$305

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 4/16

12:49 pm-10:50 pm

1 stop7h 01m

Louisville Intl

Wed 4/22

6:00 am-4:25 pm

2 stops13h 25m

$307

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 4/25

7:00 am-4:41 pm

1 stop6h 41m

Louisville Intl

Thu 4/30

3:37 pm-8:36 pm

1 stop7h 59m

$327
Quickest round-trip

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 5/9

7:30 am-4:47 pm

1 stop6h 17m

Louisville Intl

Sat 5/16

7:55 pm-11:46 pm

1 stop6h 51m

$328

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 4/25

6:05 am-8:16 pm

2 stops11h 11m

Louisville Intl

Thu 4/30

5:28 pm-8:36 pm

1 stop6h 08m

$332

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 4/25

5:59 pm-8:52 am

2 stops11h 53m

Louisville Intl

Thu 4/30

3:16 pm-11:44 pm

2 stops11h 28m

$337

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 5/9

7:30 am-4:47 pm

1 stop6h 17m

Louisville Intl

Sat 5/16

7:55 pm-11:46 pm

1 stop6h 51m

$354

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 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

What is the typical price of a round-trip flight between Ontario and Louisville?

What is the cheapest month to fly to Louisville?

If you are unable to visit Louisville during the month of July, then departing from Ontario during the month August is also very affordable. Most momondo users find prices during this month for around $400.

What is the cheapest day to depart on your flight to Louisville?

On average, the least expensive day to fly to Louisville from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $134. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Louisville on a Monday will generally be more expensive and average around $240. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Louisville?

Our data shows that the cheapest Ontario to Louisville flights are usually those with departure times at noon. Our users have found flights to Louisville at noon for as low as $132. In the morning is when there is more demand to fly to Louisville, so prices are often more expensive at around $193 per ticket.

Can stopping save me money on Ontario to Louisville flights?

You could potentially save up to 5% on your flight if you consider stops on a Ontario to Louisville flight.

How have Ontario to Louisville flight prices changed over time?

When to book flights from Ontario to Louisville

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Louisville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Louisville (ONT to SDF) flight deals and tips

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

Fastest flight time

5h 56m

Direct flights

None
The fastest flight from Ontario to Louisville takes 5h 56m
There are no direct flights from Ontario to Louisville. There are no popular flight routes from Ontario to Louisville.
Search flight deals

  • How far is Ontario to Louisville Intl by plane?

    The straight-line distance from Ontario to Louisville Intl is 1792.4 mi. Typically, this will take 5h 56m by plane in normal conditions.

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

    Prices for flights from Ontario Airport to Louisville Intl Airport are updated daily.

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

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

    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 Ontario Airport to Louisville Intl Airport.

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

    The necessary travel and health documents for your Louisville Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Louisville?

Best airlines flying from Ontario to Louisville

Compare and see reviews for airlines that fly from Ontario to Louisville with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $238Free CancellationRating
7.9
8,359 reviews
Search Delta flights
United AirlinesPriceFrom $320Free CancellationRating
7.4
9,514 reviews
Search United Airlines flights
American AirlinesPriceFrom $326Free CancellationRating
7.1
11,530 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,329 reviews
Search Southwest 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
Bardstown
Jeffersonville
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?

Flights from Ontario to Louisville with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Ontario and Louisville by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to Louisville from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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