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Cheap flights from Louisville to Los Angeles from $168

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Louisville to Los Angeles departing on 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Louisville to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:00 am - 11:47 am
SDF
-
ONT
8h 47m
1 stop
Delta Logo
10:25 pm - 9:28 am
ONT
-
SDF
8h 03m
1 stop
$335Delta
Tue, Mar 31 - Sat, Apr 4
Southwest Logo
8:40 am - 1:15 pm
SDF
-
ONT
7h 35m
1 stop
Southwest Logo
9:55 pm - 9:50 am
ONT
-
SDF
8h 55m
2 stops
$340Southwest
Thu, Apr 30 - Mon, May 4
American Airlines Logo
5:41 pm - 11:46 pm
SDF
-
ONT
9h 05m
1 stop
American Airlines Logo
9:24 am - 11:11 pm
ONT
-
SDF
10h 47m
2 stops
$345American Airlines
Mon, May 11 - Wed, May 13
Southwest Logo
10:35 am - 3:45 pm
SDF
-
ONT
8h 10m
1 stop
Southwest Logo
11:55 pm - 10:30 am
ONT
-
SDF
7h 35m
1 stop
$377Southwest
Thu, Mar 26 - Mon, Mar 30
Delta Logo
5:50 pm - 9:48 pm
SDF
-
ONT
6h 58m
1 stop
Delta Logo
10:00 pm - 10:25 am
ONT
-
SDF
9h 25m
1 stop
$386Delta
Sat, May 16 - Mon, Jun 1
Southwest Logo
6:55 am - 1:10 pm
SDF
-
ONT
9h 15m
2 stops
Southwest Logo
9:55 pm - 9:50 am
ONT
-
SDF
8h 55m
2 stops
$387Southwest
Thu, Apr 30 - Mon, May 4
Southwest Logo
5:25 pm - 11:05 pm
SDF
-
ONT
8h 40m
2 stops
Southwest Logo
3:00 pm - 12:15 am
ONT
-
SDF
6h 15m
1 stop
$391Southwest
Fri, Apr 24 - Mon, Apr 27
American Airlines Logo
6:23 pm - 10:30 pm
SDF
-
ONT
7h 07m
1 stop
American Airlines Logo
11:58 pm - 10:04 am
ONT
-
SDF
7h 06m
1 stop
$393American Airlines
Mon, Mar 23 - Wed, Mar 25
American Airlines Logo
6:23 pm - 11:59 pm
SDF
-
ONT
8h 36m
1 stop
American Airlines Logo
11:58 pm - 10:04 am
ONT
-
SDF
7h 06m
1 stop
$394American Airlines
Mon, Mar 23 - Wed, Mar 25
Southwest Logo
5:25 pm - 11:05 pm
SDF
-
ONT
8h 40m
2 stops
Southwest Logo
9:55 pm - 9:50 am
ONT
-
SDF
8h 55m
2 stops
$396Southwest
Fri, Apr 24 - Mon, Apr 27

Delta flights from Louisville to Ontario

Our best Delta deals on Louisville to Ontario flight tickets
Delta
Mar 31
SDF6:00 amLouisville Intl
8h 47m
1 stop
ONT11:47 amOntario
Apr 4
ONT10:25 pmOntario
8h 03m
1 stop
SDF9:28 amLouisville Intl
$335
Delta
May 16
SDF5:50 pmLouisville Intl
6h 58m
1 stop
ONT9:48 pmOntario
Jun 1
ONT10:00 pmOntario
9h 25m
1 stop
SDF10:25 amLouisville Intl
$386
Delta
May 16
SDF5:50 pmLouisville Intl
6h 58m
1 stop
ONT9:48 pmOntario
May 31
ONT10:00 pmOntario
7h 56m
1 stop
SDF8:56 amLouisville Intl
$407

Southwest flights from Louisville to Ontario

Our best Southwest deals on Louisville to Ontario flight tickets
Southwest
Apr 14
SDF6:40 pmLouisville Intl
6h 10m
1 stop
ONT9:50 pmOntario
Apr 15
ONT12:40 pmOntario
6h 50m
1 stop
SDF10:30 pmLouisville Intl
$321
Southwest
Apr 30
SDF8:40 amLouisville Intl
7h 35m
1 stop
ONT1:15 pmOntario
May 4
ONT9:55 pmOntario
8h 55m
2 stops
SDF9:50 amLouisville Intl
$340
Southwest
Mar 26
SDF10:35 amLouisville Intl
8h 10m
1 stop
ONT3:45 pmOntario
Mar 30
ONT11:55 pmOntario
7h 35m
1 stop
SDF10:30 amLouisville Intl
$377

momondo Fare Finder

 
Customize your flight search to find flights from Louisville to Ontario 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 March 3, 2026.
Use the filters below to find and compare flights from Louisville to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 3/31

6:00 am-11:47 am

1 stop8h 47m

Ontario

Sat 4/4

10:25 pm-9:28 am

1 stop8h 03m

$335

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 4/30

8:40 am-1:15 pm

1 stop7h 35m

Ontario

Mon 5/4

9:55 pm-9:50 am

2 stops8h 55m

$340

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 5/11

5:41 pm-11:46 pm

1 stop9h 05m

Ontario

Wed 5/13

9:24 am-11:11 pm

2 stops10h 47m

$345

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 3/26

10:35 am-3:45 pm

1 stop8h 10m

Ontario

Mon 3/30

11:55 pm-10:30 am

1 stop7h 35m

$377

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 5/16

5:50 pm-9:48 pm

1 stop6h 58m

Ontario

Mon 6/1

10:00 pm-10:25 am

1 stop9h 25m

$386

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 4/30

6:55 am-1:10 pm

2 stops9h 15m

Ontario

Mon 5/4

9:55 pm-9:50 am

2 stops8h 55m

$387

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Fri 4/24

5:25 pm-11:05 pm

2 stops8h 40m

Ontario

Mon 4/27

3:00 pm-12:15 am

1 stop6h 15m

$391

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 3/23

6:23 pm-10:30 pm

1 stop7h 07m

Ontario

Wed 3/25

11:58 pm-10:04 am

1 stop7h 06m

$393

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 3/23

6:23 pm-11:59 pm

1 stop8h 36m

Ontario

Wed 3/25

11:58 pm-10:04 am

1 stop7h 06m

$394

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Fri 4/24

5:25 pm-11:05 pm

2 stops8h 40m

Ontario

Mon 4/27

9:55 pm-9:50 am

2 stops8h 55m

$396

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Louisville to Ontario

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 Ontario?

In general, October is the cheapest month to fly from Louisville to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $324. If you aren’t able to travel during the month of October, then book flights to Ontario from Louisville during September instead. Flights to Ontario in September, while not as cheap as those in October, still average around $343.

How have Louisville to Ontario flight prices changed over time?

As of March 2026, prices for Louisville to Ontario flights are approximately 192% more expensive when compared to flights at the same time last year.

When to book flights from Louisville to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Louisville to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

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

Find info about flight duration, direct flights, and airports for your flight from Louisville to Ontario

Fastest flight time

5h 30m

Direct flights

None
The fastest flight from Louisville to Ontario takes 5h 30m
There are no direct flights from Louisville to Ontario. There are no popular flight routes from Louisville to Ontario.
Search flight deals

  • How far is Louisville Intl to Ontario by plane?

    Ontario is 1792.4 mi away from Louisville Intl. In terms of flight time, this usually takes a little over 5h 30m.

  • When did momondo last update prices for flights from Louisville Intl Airport to Ontario Airport?

    Prices for flights from Louisville Intl Airport to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from Louisville Intl Airport to Ontario Airport?

  • How old do you have to be to fly from Louisville Intl Airport to Ontario Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The necessary travel and health documents for your Ontario 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 Louisville to Ontario?

Best airlines flying from Louisville to Ontario

Compare and see reviews for airlines that fly from Louisville to Ontario with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $268Free CancellationRating
7.1
11,375 reviews
Search American Airlines flights
SouthwestPriceFrom $302Free CancellationRating
8.0
4,302 reviews
Search Southwest flights
United AirlinesPriceFrom $344Free CancellationRating
7.4
9,377 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Louisville to Ontario?

It is quick and easy to find Louisville to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from Louisville to Ontario with flexible booking policies on momondo?

Yes. All flights to Ontario from Louisville on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Louisville to Ontario?

Once all potential Louisville to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Louisville to Ontario right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Louisville to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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