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Cheap flights from Louisville to Los Angeles from $178

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 10/3. 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 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
6:50 am - 5:55 pm
ONT
-
SDF
8h 05m
1 stop
$261Southwest
Wed, Aug 5 - Wed, Aug 19
Southwest Logo
8:15 am - 12:40 pm
SDF
-
ONT
7h 25m
1 stop
Southwest Logo
9:40 am - 9:30 pm
ONT
-
SDF
8h 50m
2 stops
$266Southwest
Wed, Aug 5 - Wed, Aug 19
Southwest Logo
10:50 am - 10:05 pm
SDF
-
ONT
14h 15m
2 stops
Southwest Logo
9:40 am - 8:35 pm
ONT
-
SDF
7h 55m
2 stops
$277Southwest
Wed, Aug 5 - Wed, Aug 19
Delta Logo
7:05 am - 10:47 am
SDF
-
ONT
6h 42m
1 stop
Delta Logo
12:00 pm - 10:35 pm
ONT
-
SDF
7h 35m
1 stop
$295Delta
Sat, Oct 3 - Wed, Oct 7
Delta Logo
5:45 pm - 10:14 pm
SDF
-
ONT
7h 29m
1 stop
Delta Logo
10:59 pm - 8:50 am
ONT
-
SDF
6h 51m
1 stop
$322Delta
Tue, Oct 6 - Fri, Oct 16
Delta Logo
12:53 pm - 6:18 pm
SDF
-
ONT
8h 25m
1 stop
Delta Logo
12:00 pm - 10:35 pm
ONT
-
SDF
7h 35m
1 stop
$340Delta
Sat, Oct 10 - Fri, Oct 16
Delta Logo
6:00 am - 10:38 am
SDF
-
ONT
7h 38m
1 stop
Delta Logo
10:00 pm - 8:54 am
ONT
-
SDF
7h 54m
1 stop
$351Delta
Wed, Jul 8 - Tue, Jul 14
United Airlines Logo
5:50 pm - 10:51 pm
SDF
-
ONT
8h 01m
1 stop
United Airlines Logo
6:10 am - 5:03 pm
ONT
-
SDF
7h 53m
1 stop
$356United Airlines
Wed, Jul 1 - Sat, Jul 4
Delta Logo
7:05 am - 10:40 am
SDF
-
ONT
6h 35m
1 stop
Delta Logo
11:50 am - 12:32 am
ONT
-
SDF
9h 42m
1 stop
$361Delta
Tue, Jun 30 - Fri, Jul 3
Delta Logo
7:05 am - 10:47 am
SDF
-
ONT
6h 42m
1 stop
Delta Logo
12:00 pm - 10:35 pm
ONT
-
SDF
7h 35m
1 stop
$366Delta
Sat, Oct 3 - Wed, Oct 7

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Delta flights from Louisville to Ontario

Our best Delta deals on Louisville to Ontario flight tickets
Delta
Oct 3
SDF7:05 amLouisville Intl
6h 42m
1 stop
ONT10:47 amOntario
Oct 7
ONT12:00 pmOntario
7h 35m
1 stop
SDF10:35 pmLouisville Intl
$295
Delta
Oct 6
SDF5:45 pmLouisville Intl
7h 29m
1 stop
ONT10:14 pmOntario
Oct 16
ONT10:59 pmOntario
6h 51m
1 stop
SDF8:50 amLouisville Intl
$322
Delta
Oct 10
SDF12:53 pmLouisville Intl
8h 25m
1 stop
ONT6:18 pmOntario
Oct 16
ONT12:00 pmOntario
7h 35m
1 stop
SDF10:35 pmLouisville Intl
$340

United Airlines flights from Louisville to Ontario

Our best United Airlines deals on Louisville to Ontario flight tickets
United Airlines
Jul 1
SDF5:50 pmLouisville Intl
8h 01m
1 stop
ONT10:51 pmOntario
Jul 4
ONT6:10 amOntario
7h 53m
1 stop
SDF5:03 pmLouisville Intl
$356
United Airlines
Aug 11
SDF5:45 pmLouisville Intl
7h 50m
1 stop
ONT10:35 pmOntario
Aug 12
ONT5:00 amOntario
6h 29m
1 stop
SDF2:29 pmLouisville Intl
$393
United Airlines
Oct 10
SDF3:36 pmLouisville Intl
8h 22m
1 stop
ONT8:58 pmOntario
Oct 17
ONT7:00 amOntario
9h 11m
1 stop
SDF7:11 pmLouisville Intl
$413

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 June 10, 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

Wed 8/5

8:15 am-12:40 pm

1 stop7h 25m

Ontario

Wed 8/19

6:50 am-5:55 pm

1 stop8h 05m

$261

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 8/5

8:15 am-12:40 pm

1 stop7h 25m

Ontario

Wed 8/19

9:40 am-9:30 pm

2 stops8h 50m

$266

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 8/5

10:50 am-10:05 pm

2 stops14h 15m

Ontario

Wed 8/19

9:40 am-8:35 pm

2 stops7h 55m

$277
Quickest round-trip

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 10/3

7:05 am-10:47 am

1 stop6h 42m

Ontario

Wed 10/7

12:00 pm-10:35 pm

1 stop7h 35m

$295

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 10/6

5:45 pm-10:14 pm

1 stop7h 29m

Ontario

Fri 10/16

10:59 pm-8:50 am

1 stop6h 51m

$322

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 10/10

12:53 pm-6:18 pm

1 stop8h 25m

Ontario

Fri 10/16

12:00 pm-10:35 pm

1 stop7h 35m

$340

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 7/8

6:00 am-10:38 am

1 stop7h 38m

Ontario

Tue 7/14

10:00 pm-8:54 am

1 stop7h 54m

$351

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 7/1

5:50 pm-10:51 pm

1 stop8h 01m

Ontario

Sat 7/4

6:10 am-5:03 pm

1 stop7h 53m

$356

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 6/30

7:05 am-10:40 am

1 stop6h 35m

Ontario

Fri 7/3

11:50 am-12:32 am

1 stop9h 42m

$361

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 10/3

7:05 am-10:47 am

1 stop6h 42m

Ontario

Wed 10/7

12:00 pm-10:35 pm

1 stop7h 35m

$366

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, November 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 $0. If you aren’t able to travel during the month of November, then book flights to Ontario from Louisville during October instead. Flights to Ontario in October, while not as cheap as those in November, still average around $324.

How have Louisville to Ontario flight prices changed over time?

As of June 2026, prices for Louisville to Ontario flights are approximately 88% 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

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
11,635 reviews
Search American Airlines flights
SouthwestPriceFrom $306Free CancellationRating
7.9
4,235 reviews
Search Southwest flights
United AirlinesPriceFrom $337Free CancellationRating
7.4
9,804 reviews
Search United Airlines flights

  • Southwest Flights From Louisville to Ontario

    Across 3 Southwest flights from Louisville to Ontario this week, the average price was $447, with the best Southwest deals starting from $306 round-trip. 4,235 users have rated Southwest on momondo, with an average score of 7.9/10.

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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