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Cheap flights from Ontario to Louisville from $180

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 3/16. 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.
Delta Logo
1:15 pm - 10:47 pm
ONT
-
SDF
6h 32m
1 stop
Delta Logo
3:05 pm - 9:00 pm
SDF
-
ONT
8h 55m
1 stop
$359Delta
Mon, Mar 2 - Mon, Mar 9
Southwest Logo
3:05 pm - 12:45 am
ONT
-
SDF
6h 40m
1 stop
Southwest Logo
6:15 pm - 12:10 am
SDF
-
ONT
8h 55m
2 stops
$364Southwest
Thu, Mar 5 - Mon, Mar 9
Delta Logo
1:15 pm - 11:58 pm
ONT
-
SDF
7h 43m
1 stop
Delta Logo
5:33 am - 12:07 pm
SDF
-
ONT
9h 34m
2 stops
$372Delta
Wed, Feb 25 - Wed, Mar 4
Southwest Logo
10:40 am - 9:10 pm
ONT
-
SDF
7h 30m
2 stops
Southwest Logo
6:00 am - 12:25 pm
SDF
-
ONT
9h 25m
2 stops
$377Southwest
Wed, Feb 25 - Wed, Mar 4
Delta Logo
10:20 pm - 9:28 am
ONT
-
SDF
8h 08m
1 stop
Delta Logo
7:05 am - 11:47 am
SDF
-
ONT
7h 42m
1 stop
$379Delta
Thu, Mar 5 - Wed, Mar 11
United Airlines Logo
1:34 pm - 10:39 pm
ONT
-
SDF
6h 05m
1 stop
United Airlines Logo
5:00 am - 12:14 pm
SDF
-
ONT
10h 14m
2 stops
$384United Airlines
Tue, Apr 7 - Fri, Apr 10
Southwest Logo
2:35 pm - 12:50 am
ONT
-
SDF
7h 15m
1 stop
Southwest Logo
7:00 am - 12:40 pm
SDF
-
ONT
8h 40m
1 stop
$398Southwest
Wed, Mar 25 - Fri, Mar 27
American Airlines Logo
11:59 pm - 9:51 am
ONT
-
SDF
6h 52m
1 stop
American Airlines Logo
6:00 am - 10:06 am
SDF
-
ONT
7h 06m
1 stop
$403American Airlines
Mon, Mar 9 - Tue, Mar 17
Southwest Logo
9:45 pm - 9:55 am
ONT
-
SDF
9h 10m
2 stops
Southwest Logo
6:15 pm - 12:10 am
SDF
-
ONT
8h 55m
2 stops
$408Southwest
Wed, Mar 25 - Fri, Mar 27
Delta Logo
10:20 pm - 9:28 am
ONT
-
SDF
8h 08m
1 stop
Delta Logo
3:05 pm - 9:00 pm
SDF
-
ONT
8h 55m
1 stop
$409Delta
Mon, Mar 2 - Thu, Mar 12

Delta flights from Ontario to Louisville

Our best Delta deals on Ontario to Louisville flight tickets
Delta
Mar 2
ONT1:15 pmOntario
6h 32m
1 stop
SDF10:47 pmLouisville Intl
Mar 9
SDF3:05 pmLouisville Intl
8h 55m
1 stop
ONT9:00 pmOntario
$359
Delta
Feb 25
ONT1:15 pmOntario
7h 43m
1 stop
SDF11:58 pmLouisville Intl
Mar 4
SDF5:33 amLouisville Intl
9h 34m
2 stops
ONT12:07 pmOntario
$372
Delta
Mar 5
ONT10:20 pmOntario
8h 08m
1 stop
SDF9:28 amLouisville Intl
Mar 11
SDF7:05 amLouisville Intl
7h 42m
1 stop
ONT11:47 amOntario
$379

Southwest flights from Ontario to Louisville

Our best Southwest deals on Ontario to Louisville flight tickets
Southwest
Mar 5
ONT3:05 pmOntario
6h 40m
1 stop
SDF12:45 amLouisville Intl
Mar 9
SDF6:15 pmLouisville Intl
8h 55m
2 stops
ONT12:10 amOntario
$364
Southwest
Feb 25
ONT10:40 amOntario
7h 30m
2 stops
SDF9:10 pmLouisville Intl
Mar 4
SDF6:00 amLouisville Intl
9h 25m
2 stops
ONT12:25 pmOntario
$377
Southwest
Mar 25
ONT2:35 pmOntario
7h 15m
1 stop
SDF12:50 amLouisville Intl
Mar 27
SDF7:00 amLouisville Intl
8h 40m
1 stop
ONT12:40 pmOntario
$398

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 February 8, 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

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Mon 3/2

1:15 pm-10:47 pm

1 stop6h 32m

Louisville Intl

Mon 3/9

3:05 pm-9:00 pm

1 stop8h 55m

$359

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 3/5

3:05 pm-12:45 am

1 stop6h 40m

Louisville Intl

Mon 3/9

6:15 pm-12:10 am

2 stops8h 55m

$364

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 2/25

1:15 pm-11:58 pm

1 stop7h 43m

Louisville Intl

Wed 3/4

5:33 am-12:07 pm

2 stops9h 34m

$372

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 2/25

10:40 am-9:10 pm

2 stops7h 30m

Louisville Intl

Wed 3/4

6:00 am-12:25 pm

2 stops9h 25m

$377

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 3/5

10:20 pm-9:28 am

1 stop8h 08m

Louisville Intl

Wed 3/11

7:05 am-11:47 am

1 stop7h 42m

$379

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 4/7

1:34 pm-10:39 pm

1 stop6h 05m

Louisville Intl

Fri 4/10

5:00 am-12:14 pm

2 stops10h 14m

$384

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 3/25

2:35 pm-12:50 am

1 stop7h 15m

Louisville Intl

Fri 3/27

7:00 am-12:40 pm

1 stop8h 40m

$398

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Mon 3/9

11:59 pm-9:51 am

1 stop6h 52m

Louisville Intl

Tue 3/17

6:00 am-10:06 am

1 stop7h 06m

$403

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 3/25

9:45 pm-9:55 am

2 stops9h 10m

Louisville Intl

Fri 3/27

6:15 pm-12:10 am

2 stops8h 55m

$408

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Mon 3/2

10:20 pm-9:28 am

1 stop8h 08m

Louisville Intl

Thu 3/12

3:05 pm-9:00 pm

1 stop8h 55m

$409

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 July, 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 morning is when there is more demand to fly to Louisville, so prices are often more expensive at around $190 per ticket.

Can stopping save me money on Ontario to Louisville flights?

You could potentially save up to 9% 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 52m

Direct flights

None
The fastest flight from Ontario to Louisville takes 5h 52m
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 52m 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
United AirlinesPriceFrom $320Free CancellationRating
7.4
9,257 reviews
Search United Airlines flights
American AirlinesPriceFrom $342Free CancellationRating
7.2
11,254 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,282 reviews
Search Southwest flights
DeltaPriceFrom $346Free CancellationRating
7.9
8,173 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
Corydon
Elizabeth
Charlestown
Brandenburg
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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