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Cheap flights from Louisville to Los Angeles from $198

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 5/7. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Louisville to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
8:15 am - 12:40 pm
SDF
-
ONT
7h 25m
1 stop
Southwest Logo
10:55 am - 9:30 pm
ONT
-
SDF
7h 35m
1 stop
$273Southwest
Tue, Sep 22 - Wed, Sep 30
Delta Logo
5:45 pm - 9:56 pm
SDF
-
ONT
7h 11m
1 stop
Delta Logo
10:59 pm - 11:33 am
ONT
-
SDF
9h 34m
1 stop
$277Delta
Wed, Aug 12 - Tue, Aug 18
Southwest Logo
1:15 pm - 7:35 pm
SDF
-
ONT
9h 20m
1 stop
Southwest Logo
9:40 am - 9:30 pm
ONT
-
SDF
8h 50m
2 stops
$278Southwest
Tue, Sep 22 - Wed, Sep 30
Delta Logo
6:00 am - 11:04 am
SDF
-
ONT
8h 04m
1 stop
Delta Logo
6:00 am - 5:41 pm
ONT
-
SDF
8h 41m
2 stops
$282Delta
Wed, Aug 12 - Tue, Aug 18
Delta Logo
5:47 pm - 9:48 pm
SDF
-
ONT
7h 01m
1 stop
Delta Logo
10:00 pm - 8:56 am
ONT
-
SDF
7h 56m
1 stop
$302Delta
Sat, May 23 - Tue, Jun 2
Delta Logo
7:05 am - 4:17 pm
SDF
-
ONT
12h 12m
2 stops
Delta Logo
10:00 pm - 8:56 am
ONT
-
SDF
7h 56m
1 stop
$307Delta
Sat, May 16 - Tue, May 26
American Airlines Logo
6:07 am - 10:09 am
SDF
-
ONT
7h 02m
1 stop
American Airlines Logo
2:08 pm - 11:11 pm
ONT
-
SDF
6h 03m
1 stop
$311American Airlines
Wed, May 13 - Sat, May 16
Delta Logo
7:05 am - 4:17 pm
SDF
-
ONT
12h 12m
2 stops
Delta Logo
4:57 pm - 8:56 am
ONT
-
SDF
12h 59m
2 stops
$312Delta
Sat, May 16 - Tue, May 26
American Airlines Logo
6:07 am - 10:09 am
SDF
-
ONT
7h 02m
1 stop
American Airlines Logo
9:24 am - 11:11 pm
ONT
-
SDF
10h 47m
2 stops
$317American Airlines
Wed, May 13 - Sat, May 16
Delta Logo
5:47 pm - 9:48 pm
SDF
-
ONT
7h 01m
1 stop
Delta Logo
10:00 pm - 8:56 am
ONT
-
SDF
7h 56m
1 stop
$327Delta
Sat, May 23 - Mon, Jun 1

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United Airlines flights from Louisville to Ontario

Our best United Airlines deals on Louisville to Ontario flight tickets
United Airlines
May 12
SDF3:44 pmLouisville Intl
9h 51m
1 stop
ONT10:35 pmOntario
May 13
ONT5:00 amOntario
6h 41m
1 stop
SDF2:41 pmLouisville Intl
$373
United Airlines
Aug 15
SDF8:06 amLouisville Intl
7h 32m
1 stop
ONT12:38 pmOntario
Aug 19
ONT1:18 pmOntario
6h 33m
1 stop
SDF10:51 pmLouisville Intl
$400
United Airlines
Aug 15
SDF3:25 pmLouisville Intl
10h 33m
2 stops
ONT10:58 pmOntario
Aug 19
ONT5:00 amOntario
6h 19m
1 stop
SDF2:19 pmLouisville Intl
$405

Delta flights from Louisville to Ontario

Our best Delta deals on Louisville to Ontario flight tickets
Delta
Aug 12
SDF5:45 pmLouisville Intl
7h 11m
1 stop
ONT9:56 pmOntario
Aug 18
ONT10:59 pmOntario
9h 34m
1 stop
SDF11:33 amLouisville Intl
$277
Delta
Aug 12
SDF6:00 amLouisville Intl
8h 04m
1 stop
ONT11:04 amOntario
Aug 18
ONT6:00 amOntario
8h 41m
2 stops
SDF5:41 pmLouisville Intl
$282
Delta
May 23
SDF5:47 pmLouisville Intl
7h 01m
1 stop
ONT9:48 pmOntario
Jun 2
ONT10:00 pmOntario
7h 56m
1 stop
SDF8:56 amLouisville Intl
$302

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 April 25, 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

Cheapest round-trip

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 9/22

8:15 am-12:40 pm

1 stop7h 25m

Ontario

Wed 9/30

10:55 am-9:30 pm

1 stop7h 35m

$273

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 8/12

5:45 pm-9:56 pm

1 stop7h 11m

Ontario

Tue 8/18

10:59 pm-11:33 am

1 stop9h 34m

$277

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 9/22

1:15 pm-7:35 pm

1 stop9h 20m

Ontario

Wed 9/30

9:40 am-9:30 pm

2 stops8h 50m

$278

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 8/12

6:00 am-11:04 am

1 stop8h 04m

Ontario

Tue 8/18

6:00 am-5:41 pm

2 stops8h 41m

$282

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 5/23

5:47 pm-9:48 pm

1 stop7h 01m

Ontario

Tue 6/2

10:00 pm-8:56 am

1 stop7h 56m

$302

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 5/16

7:05 am-4:17 pm

2 stops12h 12m

Ontario

Tue 5/26

10:00 pm-8:56 am

1 stop7h 56m

$307
Quickest round-trip

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 5/13

6:07 am-10:09 am

1 stop7h 02m

Ontario

Sat 5/16

2:08 pm-11:11 pm

1 stop6h 03m

$311

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 5/16

7:05 am-4:17 pm

2 stops12h 12m

Ontario

Tue 5/26

4:57 pm-8:56 am

2 stops12h 59m

$312

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 5/13

6:07 am-10:09 am

1 stop7h 02m

Ontario

Sat 5/16

9:24 am-11:11 pm

2 stops10h 47m

$317

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 5/23

5:47 pm-9:48 pm

1 stop7h 01m

Ontario

Mon 6/1

10:00 pm-8:56 am

1 stop7h 56m

$327

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

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 March instead. Flights to Ontario in March, while not as cheap as those in October, still average around $359.

How have Louisville to Ontario flight prices changed over time?

As of April 2026, prices for Louisville to Ontario flights are approximately 16% cheaper 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

6h 33m

Direct flights

None
The fastest flight from Louisville to Ontario takes 6h 33m
There are no direct flights from Louisville to Ontario. There are no popular flight routes from Louisville to Ontario.
Search flight deals

Frequently asked questions about flying from Louisville to Ontario

  • 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 6h 33m.

  • 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
11,672 reviews
Search American Airlines flights
SouthwestPriceFrom $302Free CancellationRating
8.0
4,333 reviews
Search Southwest flights
United AirlinesPriceFrom $337Free CancellationRating
7.4
9,650 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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