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Cheap flights from Ontario to Louisville from $171

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 7/15. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Louisville

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
12:33 pm - 10:17 pm
ONT
-
SDF
6h 44m
1 stop
American Airlines Logo
7:03 am - 11:43 am
SDF
-
ONT
7h 40m
1 stop
$287American Airlines
Wed, Aug 5 - Tue, Aug 11
American Airlines Logo
7:15 pm - 10:35 am
ONT
-
SDF
12h 20m
2 stops
American Airlines Logo
7:03 am - 11:43 am
SDF
-
ONT
7h 40m
1 stop
$292American Airlines
Tue, Aug 4 - Tue, Aug 11
Southwest Logo
9:40 am - 8:35 pm
ONT
-
SDF
7h 55m
2 stops
Southwest Logo
7:05 am - 12:30 pm
SDF
-
ONT
8h 25m
2 stops
$297Southwest
Tue, Sep 1 - Tue, Sep 22
Southwest Logo
1:50 pm - 10:30 pm
ONT
-
SDF
5h 40m
1 stop
Southwest Logo
4:15 pm - 7:25 pm
SDF
-
ONT
6h 10m
1 stop
$301Southwest
Tue, Aug 4 - Mon, Aug 10
Southwest Logo
1:50 pm - 10:30 pm
ONT
-
SDF
5h 40m
1 stop
Southwest Logo
3:20 pm - 8:20 pm
SDF
-
ONT
8h 00m
2 stops
$306Southwest
Tue, Aug 11 - Thu, Aug 13
Southwest Logo
5:45 am - 5:55 pm
ONT
-
SDF
9h 10m
2 stops
Southwest Logo
3:20 pm - 8:20 pm
SDF
-
ONT
8h 00m
2 stops
$311Southwest
Tue, Aug 11 - Thu, Aug 13
Multiple Airlines Logo
8:58 am - 7:48 pm
ONT
-
SDF
7h 50m
1 stop
Multiple Airlines Logo
9:31 am - 2:03 pm
SDF
-
ONT
31h 32m
1 stop
$314Multiple Airlines
Mon, Aug 17 - Mon, Aug 31
United Airlines Logo
6:10 am - 5:03 pm
ONT
-
SDF
7h 53m
1 stop
United Airlines Logo
5:45 pm - 10:35 pm
SDF
-
ONT
7h 50m
1 stop
$332United Airlines
Sat, Aug 8 - Sat, Aug 15
American Airlines Logo
12:33 pm - 10:17 pm
ONT
-
SDF
6h 44m
1 stop
American Airlines Logo
8:16 am - 6:15 pm
SDF
-
ONT
12h 59m
2 stops
$337American Airlines
Wed, Aug 5 - Tue, Aug 11
American Airlines Logo
7:05 am - 6:18 pm
ONT
-
SDF
8h 13m
1 stop
American Airlines Logo
7:03 am - 11:43 am
SDF
-
ONT
7h 40m
1 stop
$341American Airlines
Wed, Aug 5 - Tue, Aug 11

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American Airlines flights from Ontario to Louisville

Our best American Airlines deals on Ontario to Louisville flight tickets
American Airlines
Aug 5
ONT12:33 pmOntario
6h 44m
1 stop
SDF10:17 pmLouisville Intl
Aug 11
SDF7:03 amLouisville Intl
7h 40m
1 stop
ONT11:43 amOntario
$287
American Airlines
Aug 4
ONT7:15 pmOntario
12h 20m
2 stops
SDF10:35 amLouisville Intl
Aug 11
SDF7:03 amLouisville Intl
7h 40m
1 stop
ONT11:43 amOntario
$292
American Airlines
Aug 5
ONT12:33 pmOntario
6h 44m
1 stop
SDF10:17 pmLouisville Intl
Aug 11
SDF8:16 amLouisville Intl
12h 59m
2 stops
ONT6:15 pmOntario
$337

Southwest flights from Ontario to Louisville

Our best Southwest deals on Ontario to Louisville flight tickets
Southwest
Sep 1
ONT9:40 amOntario
7h 55m
2 stops
SDF8:35 pmLouisville Intl
Sep 22
SDF7:05 amLouisville Intl
8h 25m
2 stops
ONT12:30 pmOntario
$297
Southwest
Aug 4
ONT1:50 pmOntario
5h 40m
1 stop
SDF10:30 pmLouisville Intl
Aug 10
SDF4:15 pmLouisville Intl
6h 10m
1 stop
ONT7:25 pmOntario
$301
Southwest
Aug 11
ONT1:50 pmOntario
5h 40m
1 stop
SDF10:30 pmLouisville Intl
Aug 13
SDF3:20 pmLouisville Intl
8h 00m
2 stops
ONT8:20 pmOntario
$306

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 June 28, 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 8/5

12:33 pm-10:17 pm

1 stop6h 44m

Louisville Intl

Tue 8/11

7:03 am-11:43 am

1 stop7h 40m

$287

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 8/4

7:15 pm-10:35 am

2 stops12h 20m

Louisville Intl

Tue 8/11

7:03 am-11:43 am

1 stop7h 40m

$292

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 9/1

9:40 am-8:35 pm

2 stops7h 55m

Louisville Intl

Tue 9/22

7:05 am-12:30 pm

2 stops8h 25m

$297
Quickest round-trip

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 8/4

1:50 pm-10:30 pm

1 stop5h 40m

Louisville Intl

Mon 8/10

4:15 pm-7:25 pm

1 stop6h 10m

$301

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 8/11

1:50 pm-10:30 pm

1 stop5h 40m

Louisville Intl

Thu 8/13

3:20 pm-8:20 pm

2 stops8h 00m

$306

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 8/11

5:45 am-5:55 pm

2 stops9h 10m

Louisville Intl

Thu 8/13

3:20 pm-8:20 pm

2 stops8h 00m

$311

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Mon 8/17

8:58 am-7:48 pm

1 stop7h 50m

Louisville Intl

Mon 8/31

9:31 am-2:03 pm

1 stop31h 32m

$314

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 8/8

6:10 am-5:03 pm

1 stop7h 53m

Louisville Intl

Sat 8/15

5:45 pm-10:35 pm

1 stop7h 50m

$332

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 8/5

12:33 pm-10:17 pm

1 stop6h 44m

Louisville Intl

Tue 8/11

8:16 am-6:15 pm

2 stops12h 59m

$337

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 8/5

7:05 am-6:18 pm

1 stop8h 13m

Louisville Intl

Tue 8/11

7:03 am-11:43 am

1 stop7h 40m

$341

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 February is also very affordable. Most momondo users find prices during this month for around $448.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $179. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Louisville on a Thursday will generally be more expensive and average around $676. 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 $358 per ticket.

Can stopping save me money on Ontario to Louisville flights?

You could potentially save up to 26% 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

6h 28m

Direct flights

None
The fastest flight from Ontario to Louisville takes 6h 28m
There are no direct flights from Ontario to Louisville. There are no popular flight routes from Ontario to Louisville.
Search flight deals

Frequently asked questions about flying from Ontario to Louisville

  • 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 6h 28m 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 $303Free CancellationRating
7.8
8,455 reviews
Search Delta flights
American AirlinesPriceFrom $326Free CancellationRating
7.1
11,776 reviews
Search American Airlines flights
United AirlinesPriceFrom $343Free CancellationRating
7.4
9,899 reviews
Search United Airlines flights
SouthwestPriceFrom $350Free CancellationRating
7.9
4,246 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
Jeffersonville
West Baden Springs
Bardstown
Shepherdsville
New Albany
Elizabeth
Charlestown
Corydon
Brandenburg
Georgetown
Springfield

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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