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Cheap flights from Ontario to Louisville from $156

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 12/31. 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.
Southwest Logo
1:00 pm - 11:20 pm
ONT
-
SDF
7h 20m1 stop
Southwest Logo
8:40 am - 1:50 pm
SDF
-
ONT
8h 10m1 stop
$321Southwest
Tue, Jan 27 - Tue, Feb 3
Southwest Logo
5:55 am - 5:30 pm
ONT
-
SDF
8h 35m1 stop
Southwest Logo
6:45 am - 4:05 pm
SDF
-
ONT
12h 20m2 stops
$326Southwest
Tue, Jan 27 - Tue, Feb 3
Southwest Logo
6:05 am - 5:30 pm
ONT
-
SDF
8h 25m2 stops
Southwest Logo
6:00 am - 12:15 pm
SDF
-
ONT
9h 15m2 stops
$331Southwest
Tue, Jan 27 - Tue, Feb 3
Delta Logo
10:30 pm - 9:26 am
ONT
-
SDF
7h 56m1 stop
Delta Logo
3:32 pm - 9:05 pm
SDF
-
ONT
8h 33m1 stop
$340Delta
Sat, Jan 24 - Wed, Jan 28
Delta Logo
10:30 pm - 9:26 am
ONT
-
SDF
7h 56m1 stop
Delta Logo
5:35 am - 12:16 pm
SDF
-
ONT
9h 41m2 stops
$345Delta
Sat, Jan 24 - Wed, Jan 28
American Airlines Logo
9:59 am - 8:47 pm
ONT
-
SDF
7h 48m2 stops
American Airlines Logo
8:07 am - 4:05 pm
SDF
-
ONT
10h 58m2 stops
$350American Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
1:24 pm - 10:24 pm
ONT
-
SDF
6h 00m1 stop
United Airlines Logo
3:22 pm - 8:58 pm
SDF
-
ONT
8h 36m1 stop
$391United Airlines
Sat, Jan 17 - Tue, Jan 20
United Airlines Logo
5:05 am - 2:26 pm
ONT
-
SDF
6h 21m1 stop
United Airlines Logo
2:05 pm - 8:58 pm
SDF
-
ONT
9h 53m2 stops
$396United Airlines
Sat, Jan 17 - Tue, Jan 20
Southwest Logo
5:30 am - 2:20 pm
ONT
-
SDF
5h 50m1 stop
Southwest Logo
6:45 am - 10:40 am
SDF
-
ONT
6h 55m1 stop
$398Southwest
Sat, Jan 31 - Sun, Feb 8
Delta Logo
10:30 pm - 9:26 am
ONT
-
SDF
7h 56m1 stop
Delta Logo
5:35 am - 11:31 am
SDF
-
ONT
8h 56m1 stop
$399Delta
Mon, Jan 26 - Sun, Feb 1

Southwest flights from Ontario to Louisville

Our best Southwest deals on Ontario to Louisville flight tickets
Southwest
Jan 27
ONT1:00 pmOntario
7h 20m
1 stop
SDF11:20 pmLouisville Intl
Feb 3
SDF8:40 amLouisville Intl
8h 10m
1 stop
ONT1:50 pmOntario
$321
Find similar
Southwest
Jan 27
ONT5:55 amOntario
8h 35m
1 stop
SDF5:30 pmLouisville Intl
Feb 3
SDF6:45 amLouisville Intl
12h 20m
2 stops
ONT4:05 pmOntario
$326
Find similar
Southwest
Jan 27
ONT6:05 amOntario
8h 25m
2 stops
SDF5:30 pmLouisville Intl
Feb 3
SDF6:00 amLouisville Intl
9h 15m
2 stops
ONT12:15 pmOntario
$331
Find similar

Delta flights from Ontario to Louisville

Our best Delta deals on Ontario to Louisville flight tickets
Delta
Jan 24
ONT10:30 pmOntario
7h 56m
1 stop
SDF9:26 amLouisville Intl
Jan 28
SDF3:32 pmLouisville Intl
8h 33m
1 stop
ONT9:05 pmOntario
$340
Find similar
Delta
Jan 24
ONT10:30 pmOntario
7h 56m
1 stop
SDF9:26 amLouisville Intl
Jan 28
SDF5:35 amLouisville Intl
9h 41m
2 stops
ONT12:16 pmOntario
$345
Find similar
Delta
Jan 26
ONT10:30 pmOntario
7h 56m
1 stop
SDF9:26 amLouisville Intl
Feb 1
SDF5:35 amLouisville Intl
8h 56m
1 stop
ONT11:31 amOntario
$399
Find similar

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 December 21, 2025.
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

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 1/27

1:00 pm-11:20 pm

1 stop7h 20m

Louisville Intl

Tue 2/3

8:40 am-1:50 pm

1 stop8h 10m

$321

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 1/27

5:55 am-5:30 pm

1 stop8h 35m

Louisville Intl

Tue 2/3

6:45 am-4:05 pm

2 stops12h 20m

$326

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 1/27

6:05 am-5:30 pm

2 stops8h 25m

Louisville Intl

Tue 2/3

6:00 am-12:15 pm

2 stops9h 15m

$331

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 1/24

10:30 pm-9:26 am

1 stop7h 56m

Louisville Intl

Wed 1/28

3:32 pm-9:05 pm

1 stop8h 33m

$340

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 1/24

10:30 pm-9:26 am

1 stop7h 56m

Louisville Intl

Wed 1/28

5:35 am-12:16 pm

2 stops9h 41m

$345

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 1/24

9:59 am-8:47 pm

2 stops7h 48m

Louisville Intl

Wed 1/28

8:07 am-4:05 pm

2 stops10h 58m

$350

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 1/17

1:24 pm-10:24 pm

1 stop6h 00m

Louisville Intl

Tue 1/20

3:22 pm-8:58 pm

1 stop8h 36m

$391

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 1/17

5:05 am-2:26 pm

1 stop6h 21m

Louisville Intl

Tue 1/20

2:05 pm-8:58 pm

2 stops9h 53m

$396

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 1/31

5:30 am-2:20 pm

1 stop5h 50m

Louisville Intl

Sun 2/8

6:45 am-10:40 am

1 stop6h 55m

$398

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Mon 1/26

10:30 pm-9:26 am

1 stop7h 56m

Louisville Intl

Sun 2/1

5:35 am-11:31 am

1 stop8h 56m

$399

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 cheapest month to fly to Louisville?

If you are unable to visit Louisville during the month of February, then departing from Ontario during the month April is also very affordable. Most momondo users find prices during this month for around $403.

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 $138. 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 evening is when there is more demand to fly to Louisville, so prices are often more expensive at around $366 per ticket.

Can stopping save me money on Ontario to Louisville flights?

You could potentially save up to 17% 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 39m

Direct flights

None
The fastest flight from Ontario to Louisville takes 5h 39m
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 39m 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
SouthwestPriceFrom $342Free CancellationRating
8.0
4,257 reviews
Search Southwest flights
American AirlinesPriceFrom $342Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
United AirlinesPriceFrom $343Free CancellationRating
7.4
9,100 reviews
Search United Airlines flights
DeltaPriceFrom $346Free CancellationRating
7.9
8,021 reviews
Search Delta 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
Shepherdsville
New Albany
Elizabeth
Corydon
Charlestown
Springfield
Brandenburg
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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