Which airport is the most popular layover for flights between Ontario and Louisville?

Dallas (DFW) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Louisville?

American Airlines, Delta and Southwest are the top three most popular airlines that fly to Louisville from Ontario according to our data. American Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Louisville. Keep in mind that there are 8 different airlines that fly to Louisville on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Ontario to Louisville?

Flights via Dallas (DFW) offer the lowest average round-trip price of $421.

Which layover airport has the shortest connection time from Ontario to Louisville?

Dallas (DFW) has the shortest average layover time for this route: 0h 59m.

Which layover airport has the shortest travel time from Ontario to Louisville?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 6h 06m.

What is the cheapest airline that flies from Ontario to Louisville Intl?

Delta and United Airlines are the most popular carriers operating from Ontario to Louisville Intl

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?

The number of operators available for flights from Ontario Airport to Louisville Intl Airport is 4 as of October 2026.

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.

$144 Cheap Flights from Ontario to Louisville in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Louisville

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:26 pm - 7:19 pmONT Ontario-SDF Louisville Intl

20h 53m1 stop San Francisco

8:47 am - 11:23 pmSDF Louisville Intl-ONT Ontario

17h 36m1 stop San Francisco

$253Multiple Airlines

Thu, Dec 10 - Mon, Dec 14

7:26 pm - 7:19 pmONT Ontario-SDF Louisville Intl

20h 53m1 stop San Francisco

8:47 am - 11:23 pmSDF Louisville Intl-ONT Ontario

17h 36m1 stop San Francisco

$262Multiple Airlines

Thu, Dec 3 - Mon, Dec 7

2:22 pm - 11:34 pmONT Ontario-SDF Louisville Intl

6h 12m1 stop Dallas/Fort Worth

6:01 am - 9:40 amSDF Louisville Intl-ONT Ontario

6h 39m1 stop Dallas/Fort Worth

$341American Airlines

Wed, Nov 11 - Sat, Nov 14

2:22 pm - 11:34 pmONT Ontario-SDF Louisville Intl

6h 12m1 stop Dallas/Fort Worth

7:10 am - 12:38 pmSDF Louisville Intl-ONT Ontario

8h 28m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

$346American Airlines

Wed, Nov 11 - Sat, Nov 14

1:29 pm - 10:24 pmONT Ontario-SDF Louisville Intl

5h 55m1 stop Denver Intl

8:00 am - 12:33 pmSDF Louisville Intl-ONT Ontario

7h 33m1 stop Denver Intl

$379United Airlines

Thu, Nov 5 - Sun, Nov 8

1:29 pm - 10:24 pmONT Ontario-SDF Louisville Intl

5h 55m1 stop Denver Intl

8:00 am - 12:33 pmSDF Louisville Intl-ONT Ontario

7h 33m1 stop Denver Intl

$379United Airlines

Thu, Nov 12 - Sun, Nov 15

8:40 am - 8:40 pmONT Ontario-SDF Louisville Intl

9h 00m2 stops Phoenix Sky Harbor Intl Nashville Intl

12:10 pm - 7:45 pmSDF Louisville Intl-ONT Ontario

10h 35m2 stops Dallas Love Field Phoenix Sky Harbor Intl

$380Southwest

Thu, Dec 3 - Mon, Dec 7

12:10 pm - 11:40 pmONT Ontario-SDF Louisville Intl

8h 30m1 stop Phoenix Sky Harbor Intl

4:05 pm - 10:15 pmSDF Louisville Intl-ONT Ontario

9h 10m1 stop Dallas Love Field

$408Southwest

Sun, Nov 1 - Thu, Nov 5

12:18 pm - 11:13 pmONT Ontario-SDF Louisville Intl

7h 55m1 stop Atlanta Hartsfield-Jackson

5:59 pm - 9:57 pmSDF Louisville Intl-ONT Ontario

6h 58m1 stop Atlanta Hartsfield-Jackson

$410Delta

Wed, Nov 11 - Sun, Nov 15

12:16 pm - 9:38 pmONT Ontario-SDF Louisville Intl

6h 22m1 stop Atlanta Hartsfield-Jackson

1:59 pm - 7:30 pmSDF Louisville Intl-ONT Ontario

8h 31m1 stop Atlanta Hartsfield-Jackson

$471Delta

Sat, Oct 24 - Mon, Nov 2

Cheap last minute flights

Enter your travel dates to find the best prices.

2:22 pm - 11:27 pmONT Ontario-SDF Louisville Intl

6h 05m1 stop Dallas/Fort Worth

6:01 am - 9:40 amSDF Louisville Intl-ONT Ontario

6h 39m1 stop Dallas/Fort Worth

$471American Airlines

Tue, Oct 20 - Tue, Nov 3

2:22 pm - 11:27 pmONT Ontario-SDF Louisville Intl

6h 05m1 stop Dallas/Fort Worth

6:01 am - 9:40 amSDF Louisville Intl-ONT Ontario

6h 39m1 stop Dallas/Fort Worth

$471American Airlines

Tue, Oct 20 - Tue, Nov 3

9:41 am - 11:27 pmONT Ontario-SDF Louisville Intl

10h 46m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

1:24 pm - 6:42 pmSDF Louisville Intl-ONT Ontario

8h 18m1 stop Dallas/Fort Worth

$476American Airlines

Tue, Oct 20 - Tue, Nov 3

12:16 pm - 11:59 pmONT Ontario-SDF Louisville Intl

8h 43m1 stop Atlanta Hartsfield-Jackson

7:05 am - 11:06 amSDF Louisville Intl-ONT Ontario

7h 01m1 stop Atlanta Hartsfield-Jackson

$601Delta

Sat, Oct 17 - Wed, Oct 21

1:22 pm - 10:32 pmONT Ontario-SDF Louisville Intl

6h 10m1 stop Denver Intl

3:37 pm - 9:59 pmSDF Louisville Intl-ONT Ontario

9h 22m1 stop Houston George Bush Intcntl

$721United Airlines

Sat, Oct 17 - Wed, Oct 21

12:16 pm - 10:37 pmONT Ontario-SDF Louisville Intl

7h 21m1 stop Atlanta Hartsfield-Jackson

1:56 pm - 6:21 pmSDF Louisville Intl-ONT Ontario

7h 25m1 stop Atlanta Hartsfield-Jackson

$761Delta

Thu, Oct 15 - Fri, Oct 16

1:22 pm - 10:32 pmONT Ontario-SDF Louisville Intl

6h 10m1 stop Denver Intl

8:00 am - 12:30 pmSDF Louisville Intl-ONT Ontario

7h 30m1 stop Denver Intl

$804United Airlines

Tue, Oct 20 - Fri, Oct 30

6:02 am - 9:35 pmONT Ontario-SDF Louisville Intl

12h 33m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

12:45 pm - 11:42 pmSDF Louisville Intl-ONT Ontario

13h 57m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$896Alaska Airlines

Tue, Oct 20 - Fri, Oct 30

6:56 pm - 12:10 pmONT Ontario-SDF Louisville Intl

14h 14m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

6:29 am - 6:00 pmSDF Louisville Intl-ONT Ontario

14h 31m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$909Alaska Airlines

Fri, Oct 16 - Sun, Oct 18

12:16 pm - 9:38 pmONT Ontario-SDF Louisville Intl

6h 22m1 stop Atlanta Hartsfield-Jackson

5:38 pm - 11:55 pmSDF Louisville Intl-ONT Ontario

9h 17m2 stops Detroit Metropolitan Wayne County Salt Lake City

$1,715Delta

Sat, Oct 17 - Wed, Oct 21

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American Airlines flights from Ontario to Louisville

Our best American Airlines deals on Ontario to Louisville flight tickets

American Airlines

Nov 11

ONT2:22 pmOntario

6h 12m

1 stop

SDF11:34 pmLouisville Intl

Nov 14

SDF6:01 amLouisville Intl

6h 39m

1 stop

ONT9:40 amOntario

$341

American Airlines

Nov 11

ONT2:22 pmOntario

6h 12m

1 stop

SDF11:34 pmLouisville Intl

Nov 14

SDF7:10 amLouisville Intl

8h 28m

2 stops

ONT12:38 pmOntario

$346

American Airlines

Nov 26

ONT6:00 amOntario

7h 02m

1 stop

SDF4:02 pmLouisville Intl

Dec 1

SDF3:27 pmLouisville Intl

10h 53m

1 stop

ONT11:20 pmOntario

$370

United Airlines flights from Ontario to Louisville

Our best United Airlines deals on Ontario to Louisville flight tickets

United Airlines

Nov 5

ONT1:29 pmOntario

5h 55m

1 stop

SDF10:24 pmLouisville Intl

Nov 8

SDF8:00 amLouisville Intl

7h 33m

1 stop

ONT12:33 pmOntario

$379

United Airlines

Nov 17

ONT7:00 amOntario

6h 57m

1 stop

SDF4:57 pmLouisville Intl

Nov 18

SDF3:24 pmLouisville Intl

8h 27m

1 stop

ONT8:51 pmOntario

$461

United Airlines

Nov 17

ONT5:00 amOntario

6h 22m

1 stop

SDF2:22 pmLouisville Intl

Nov 18

SDF10:37 amLouisville Intl

14h 03m

2 stops

ONT9:40 pmOntario

$466

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Thu 12/10

7:26 pm-7:19 pm

1 stop20h 53m

Louisville Intl

Mon 12/14

8:47 am-11:23 pm

1 stop17h 36m

$253

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Thu 12/3

7:26 pm-7:19 pm

1 stop20h 53m

Louisville Intl

Mon 12/7

8:47 am-11:23 pm

1 stop17h 36m

$262

Quickest round-trip

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Wed 11/11

2:22 pm-11:34 pm

1 stop6h 12m

Louisville Intl

Sat 11/14

6:01 am-9:40 am

1 stop6h 39m

$341

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Wed 11/11

2:22 pm-11:34 pm

1 stop6h 12m

Louisville Intl

Sat 11/14

7:10 am-12:38 pm

2 stops8h 28m

$346

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Thu 11/5

1:29 pm-10:24 pm

1 stop5h 55m

Louisville Intl

Sun 11/8

8:00 am-12:33 pm

1 stop7h 33m

$379

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Thu 11/12

1:29 pm-10:24 pm

1 stop5h 55m

Louisville Intl

Sun 11/15

8:00 am-12:33 pm

1 stop7h 33m

$379

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Thu 12/3

8:40 am-8:40 pm

2 stops9h 00m

Louisville Intl

Mon 12/7

12:10 pm-7:45 pm

2 stops10h 35m

$380

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Sun 11/1

12:10 pm-11:40 pm

1 stop8h 30m

Louisville Intl

Thu 11/5

4:05 pm-10:15 pm

1 stop9h 10m

$408

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Wed 11/11

12:18 pm-11:13 pm

1 stop7h 55m

Louisville Intl

Sun 11/15

5:59 pm-9:57 pm

1 stop6h 58m

$410

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Sat 10/24

12:16 pm-9:38 pm

1 stop6h 22m

Louisville Intl

Mon 11/2

1:59 pm-7:30 pm

1 stop8h 31m

$471

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

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

Prices are currently low for flights on this route.

Typical prices usually range from $366 to $567.
The lowest price recently found on this route was $253.

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 $429.

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.

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

Best Price Found	$144
Fastest flight time	5h 48m
Direct flights	None

The best one-way flight to Louisville from Ontario in the past 72 hours is $144. The best round-trip flight deal from Ontario to Louisville found on momondo in the last 72 hours is $253.

The fastest flight from Ontario to Louisville takes 5h 48m

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 5h 48m 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?
The number of operators available for flights from Ontario Airport to Louisville Intl Airport is 4 as of October 2026.
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?
Based on momondo bookings for flights between Ontario and Louisville, the leading airline is Southwest, making up 50% of the total bookings. Other popular airlines include American Airlines with 34%, United Airlines with 9%, and Delta with 7%.

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 Airlines	PriceFrom $276	Free Cancellation	Rating 7.4 10,362 reviews	Search United Airlines flights
American Airlines	PriceFrom $288	Free Cancellation	Rating 7.0 12,165 reviews	Search American Airlines flights
Delta	PriceFrom $303	Free Cancellation	Rating 7.8 8,650 reviews	Search Delta flights
Southwest	PriceFrom $327	Free Cancellation	Rating 7.9 4,214 reviews	Search Southwest flights

French Lick

Elizabethtown

Jeffersonville

West Baden Springs

New Albany

Bardstown

Shepherdsville

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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Airports servicing Kentucky

Lexington Blue Grass Airport

Owensboro Daviess County Airport

Paducah Barkley Regional Airport

Cheap flights from Ontario to Louisville from $144

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 11/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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American Airlines flights from Ontario to Louisville

Our best American Airlines deals on Ontario to Louisville flight tickets

United Airlines flights from Ontario to Louisville

Our best United Airlines deals on Ontario to Louisville flight tickets

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Use the filters below to find and compare flights from Ontario to Louisville that are best for you.

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How to get the cheapest flight ticket from Ontario to Louisville

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

What is the cheapest month to fly to Louisville?

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

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

How have Ontario to Louisville flight prices changed over time?

What is the cheapest airline that flies from Ontario to Louisville Intl?

What airlines fly to Louisville?

Which airport is the most popular layover for flights between Ontario and Louisville?

Which layover airport offers the lowest fares from Ontario to Louisville?

Which layover airport has the shortest travel time from Ontario to Louisville?

Which layover airport has the shortest connection time from Ontario to Louisville?

When to book flights from Ontario to Louisville

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near Louisville?

Why use momondo?

An easier way to manage your Louisville trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Kentucky

Fly your favorite airline to Louisville

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Louisville

List of cabin classes available on flights landing in Louisville. Availability may vary depending on flight origin and airline.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Ontario

According to popular flight searches on momondo this year

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