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Cheap flights from Ontario to Louisville from $151

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 12/10. 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.
Multiple Airlines Logo
6:30 am - 4:15 pmONT-SDF
6h 45m1 stop
Multiple Airlines Logo
5:20 pm - 9:17 pmSDF-ONT
6h 57m1 stop
$300Multiple Airlines
Find Deal
Mon, Feb 23 - Fri, Feb 27
Delta Logo
12:12 pm - 10:58 pmONT-SDF
7h 46m1 stop
Delta Logo
3:18 pm - 7:39 pmSDF-ONT
7h 21m1 stop
$321Delta
Find Deal
Thu, Dec 4 - Wed, Dec 10
Delta Logo
1:04 pm - 11:50 pmONT-SDF
7h 46m1 stop
Delta Logo
5:35 am - 11:54 amSDF-ONT
9h 19m1 stop
$323Delta
Find Deal
Wed, Jan 21 - Sun, Jan 25
Delta Logo
6:00 am - 6:14 pmONT-SDF
9h 14m2 stops
Delta Logo
7:00 am - 11:54 amSDF-ONT
7h 54m1 stop
$328Delta
Find Deal
Wed, Jan 21 - Sun, Jan 25
American Airlines Logo
9:59 am - 10:00 pmONT-SDF
9h 01m2 stops
American Airlines Logo
8:30 am - 4:02 pmSDF-ONT
10h 32m2 stops
$354American Airlines
Find Deal
Tue, Dec 2 - Thu, Dec 4
Southwest Logo
6:30 am - 4:35 pmONT-SDF
7h 05m1 stop
Southwest Logo
12:00 pm - 3:20 pmSDF-ONT
6h 20m1 stop
$379Southwest
Find Deal
Thu, Dec 4 - Sun, Dec 7
Southwest Logo
11:15 am - 9:30 pmONT-SDF
7h 15m1 stop
Southwest Logo
6:35 am - 12:30 pmSDF-ONT
8h 55m2 stops
$384Southwest
Find Deal
Thu, Dec 4 - Sun, Dec 7
United Airlines Logo
1:29 pm - 10:30 pmONT-SDF
6h 01m1 stop
United Airlines Logo
8:00 am - 12:33 pmSDF-ONT
7h 33m1 stop
$403United Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
American Airlines Logo
9:53 am - 11:30 pmONT-SDF
10h 37m2 stops
American Airlines Logo
6:19 pm - 10:14 pmSDF-ONT
6h 55m1 stop
$404American Airlines
Find Deal
Tue, Dec 23 - Tue, Dec 30
United Airlines Logo
1:40 pm - 10:24 pmONT-SDF
5h 44m1 stop
United Airlines Logo
6:11 pm - 10:25 pmSDF-ONT
7h 14m1 stop
$452United Airlines
Find Deal
Wed, Dec 24 - Tue, Dec 30

Delta flights from Ontario to Louisville

Our best Delta deals on Ontario to Louisville flight tickets
Delta
Dec 4
ONT12:12 pmOntario
7h 46m
1 stop
SDF10:58 pmLouisville Intl
Dec 10
SDF3:18 pmLouisville Intl
7h 21m
1 stop
ONT7:39 pmOntario
$321
Find similar
Delta
Jan 21
ONT1:04 pmOntario
7h 46m
1 stop
SDF11:50 pmLouisville Intl
Jan 25
SDF5:35 amLouisville Intl
9h 19m
1 stop
ONT11:54 amOntario
$323
Find similar
Delta
Jan 21
ONT6:00 amOntario
9h 14m
2 stops
SDF6:14 pmLouisville Intl
Jan 25
SDF7:00 amLouisville Intl
7h 54m
1 stop
ONT11:54 amOntario
$328
Find similar

American Airlines flights from Ontario to Louisville

Our best American Airlines deals on Ontario to Louisville flight tickets
American Airlines
Dec 2
ONT9:59 amOntario
9h 01m
2 stops
SDF10:00 pmLouisville Intl
Dec 4
SDF8:30 amLouisville Intl
10h 32m
2 stops
ONT4:02 pmOntario
$354
Find similar
American Airlines
Dec 23
ONT9:53 amOntario
10h 37m
2 stops
SDF11:30 pmLouisville Intl
Dec 30
SDF6:19 pmLouisville Intl
6h 55m
1 stop
ONT10:14 pmOntario
$404
Find similar
American Airlines
Dec 25
ONT7:10 amOntario
7h 18m
1 stop
SDF5:28 pmLouisville Intl
Dec 30
SDF6:19 pmLouisville Intl
6h 55m
1 stop
ONT10:14 pmOntario
$444
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 October 30, 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

Mon 2/23

6:30 am-4:15 pm

1 stop6h 45m

Louisville Intl

Fri 2/27

5:20 pm-9:17 pm

1 stop6h 57m

$300

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 12/4

12:12 pm-10:58 pm

1 stop7h 46m

Louisville Intl

Wed 12/10

3:18 pm-7:39 pm

1 stop7h 21m

$321

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 1/21

1:04 pm-11:50 pm

1 stop7h 46m

Louisville Intl

Sun 1/25

5:35 am-11:54 am

1 stop9h 19m

$323

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 1/21

6:00 am-6:14 pm

2 stops9h 14m

Louisville Intl

Sun 1/25

7:00 am-11:54 am

1 stop7h 54m

$328

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 12/2

9:59 am-10:00 pm

2 stops9h 01m

Louisville Intl

Thu 12/4

8:30 am-4:02 pm

2 stops10h 32m

$354

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 12/4

6:30 am-4:35 pm

1 stop7h 05m

Louisville Intl

Sun 12/7

12:00 pm-3:20 pm

1 stop6h 20m

$379

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 12/4

11:15 am-9:30 pm

1 stop7h 15m

Louisville Intl

Sun 12/7

6:35 am-12:30 pm

2 stops8h 55m

$384

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 11/20

1:29 pm-10:30 pm

1 stop6h 01m

Louisville Intl

Mon 11/24

8:00 am-12:33 pm

1 stop7h 33m

$403

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 12/23

9:53 am-11:30 pm

2 stops10h 37m

Louisville Intl

Tue 12/30

6:19 pm-10:14 pm

1 stop6h 55m

$404

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 12/24

1:40 pm-10:24 pm

1 stop5h 44m

Louisville Intl

Tue 12/30

6:11 pm-10:25 pm

1 stop7h 14m

$452

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 August is also very affordable. Most momondo users find prices during this month for around $406.

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 34% on your flight if you consider stops on a Ontario to Louisville flight.

How have Ontario to Louisville flight prices changed over time?

As of October 2025, prices for Ontario to Louisville flights are approximately 180% more expensive when compared to flights at the same time last year.

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

Direct flights

None
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 44m 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
4,243 reviews
Search Southwest flights
American AirlinesPriceFrom $342Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights
United AirlinesPriceFrom $343Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
DeltaPriceFrom $346Free CancellationRating
7.9
7,998 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
Georgetown
Brandenburg

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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