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Cheap flights from Louisville to Los Angeles from $140

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 11/27. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:00 am - 11:38 amSDF-ONT
7h 38m1 stop
Delta Logo
10:30 pm - 9:34 amONT-SDF
8h 04m1 stop
$279Delta
Find Deal
Sun, Feb 15 - Wed, Feb 18
Multiple Airlines Logo
9:43 am - 12:12 amSDF-ONT
17h 29m1 stop
Multiple Airlines Logo
6:00 am - 10:47 pmONT-SDF
13h 47m2 stops
$309Multiple Airlines
Find Deal
Mon, Oct 27 - Thu, Oct 30
Delta Logo
2:59 pm - 9:14 pmSDF-ONT
9h 15m1 stop
Delta Logo
10:30 pm - 9:34 amONT-SDF
8h 04m1 stop
$315Delta
Find Deal
Mon, Feb 9 - Sat, Feb 14
Delta Logo
6:00 am - 10:26 amSDF-ONT
7h 26m1 stop
Delta Logo
7:05 am - 5:16 pmONT-SDF
7h 11m1 stop
$317Delta
Find Deal
Tue, Nov 4 - Tue, Nov 18
United Airlines Logo
8:00 am - 12:33 pmSDF-ONT
7h 33m1 stop
United Airlines Logo
5:05 am - 2:19 pmONT-SDF
6h 14m1 stop
$323United Airlines
Find Deal
Fri, Oct 31 - Sat, Nov 8
United Airlines Logo
11:00 am - 8:44 pmSDF-ONT
12h 44m2 stops
United Airlines Logo
5:05 am - 2:19 pmONT-SDF
6h 14m1 stop
$328United Airlines
Find Deal
Fri, Oct 31 - Sat, Nov 8
United Airlines Logo
7:00 am - 12:33 pmSDF-ONT
8h 33m2 stops
United Airlines Logo
5:05 am - 7:27 pmONT-SDF
11h 22m2 stops
$333United Airlines
Find Deal
Fri, Oct 31 - Sat, Nov 8
Delta Logo
3:11 pm - 7:19 pmSDF-ONT
7h 08m1 stop
Delta Logo
7:05 am - 5:16 pmONT-SDF
7h 11m1 stop
$334Delta
Find Deal
Tue, Nov 4 - Thu, Nov 20
American Airlines Logo
8:14 pm - 11:57 pmSDF-ONT
6h 43m1 stop
American Airlines Logo
2:59 pm - 11:53 pmONT-SDF
5h 54m1 stop
$395American Airlines
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Thu, Nov 6 - Fri, Nov 21
American Airlines Logo
3:46 pm - 8:07 pmSDF-ONT
7h 21m1 stop
American Airlines Logo
2:51 pm - 11:53 pmONT-SDF
6h 02m1 stop
$443American Airlines
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Thu, Oct 23 - Thu, Oct 30

Delta flights from Louisville to Ontario

Our best Delta deals on Louisville to Ontario flight tickets
Delta
Feb 15
SDF7:00 amLouisville Intl
7h 38m
1 stop
ONT11:38 amOntario
Feb 18
ONT10:30 pmOntario
8h 04m
1 stop
SDF9:34 amLouisville Intl
$279
Find similar
Delta
Feb 9
SDF2:59 pmLouisville Intl
9h 15m
1 stop
ONT9:14 pmOntario
Feb 14
ONT10:30 pmOntario
8h 04m
1 stop
SDF9:34 amLouisville Intl
$315
Find similar
Delta
Nov 4
SDF6:00 amLouisville Intl
7h 26m
1 stop
ONT10:26 amOntario
Nov 18
ONT7:05 amOntario
7h 11m
1 stop
SDF5:16 pmLouisville Intl
$317
Find similar

United Airlines flights from Louisville to Ontario

Our best United Airlines deals on Louisville to Ontario flight tickets
United Airlines
Oct 31
SDF8:00 amLouisville Intl
7h 33m
1 stop
ONT12:33 pmOntario
Nov 8
ONT5:05 amOntario
6h 14m
1 stop
SDF2:19 pmLouisville Intl
$323
Find similar
United Airlines
Oct 31
SDF11:00 amLouisville Intl
12h 44m
2 stops
ONT8:44 pmOntario
Nov 8
ONT5:05 amOntario
6h 14m
1 stop
SDF2:19 pmLouisville Intl
$328
Find similar
United Airlines
Oct 31
SDF7:00 amLouisville Intl
8h 33m
2 stops
ONT12:33 pmOntario
Nov 8
ONT5:05 amOntario
11h 22m
2 stops
SDF7:27 pmLouisville Intl
$333
Find similar

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 October 9, 2025.
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

Sun 2/15

7:00 am-11:38 am

1 stop7h 38m

Ontario

Wed 2/18

10:30 pm-9:34 am

1 stop8h 04m

$279

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 10/27

9:43 am-12:12 am

1 stop17h 29m

Ontario

Thu 10/30

6:00 am-10:47 pm

2 stops13h 47m

$309

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 2/9

2:59 pm-9:14 pm

1 stop9h 15m

Ontario

Sat 2/14

10:30 pm-9:34 am

1 stop8h 04m

$315

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 11/4

6:00 am-10:26 am

1 stop7h 26m

Ontario

Tue 11/18

7:05 am-5:16 pm

1 stop7h 11m

$317

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Fri 10/31

8:00 am-12:33 pm

1 stop7h 33m

Ontario

Sat 11/8

5:05 am-2:19 pm

1 stop6h 14m

$323

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Fri 10/31

11:00 am-8:44 pm

2 stops12h 44m

Ontario

Sat 11/8

5:05 am-2:19 pm

1 stop6h 14m

$328

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Fri 10/31

7:00 am-12:33 pm

2 stops8h 33m

Ontario

Sat 11/8

5:05 am-7:27 pm

2 stops11h 22m

$333

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 11/4

3:11 pm-7:19 pm

1 stop7h 08m

Ontario

Thu 11/20

7:05 am-5:16 pm

1 stop7h 11m

$334

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 11/6

8:14 pm-11:57 pm

1 stop6h 43m

Ontario

Fri 11/21

2:59 pm-11:53 pm

1 stop5h 54m

$395

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 10/23

3:46 pm-8:07 pm

1 stop7h 21m

Ontario

Thu 10/30

2:51 pm-11:53 pm

1 stop6h 02m

$443

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, September 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 $343. If you aren’t able to travel during the month of September, then book flights to Ontario from Louisville during August instead. Flights to Ontario in August, while not as cheap as those in September, still average around $344.

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

The cheapest day to depart on your flight to Ontario is on a Thursday when prices can be found for as low as $461. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Louisville to Ontario for around $597.

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

In the evening is the cheapest time of day to fly from Louisville to Ontario when you can find flight prices for as low as $417. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $665 on average. Flights to Ontario from Louisville at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How have Louisville to Ontario flight prices changed over time?

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

Direct flights

None
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 6h 34m.

  • 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
United AirlinesPriceFrom $257Free CancellationRating
7.4
8,965 reviews
Search United Airlines flights
American AirlinesPriceFrom $268Free CancellationRating
7.2
11,041 reviews
Search American Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
7,968 reviews
Search Delta flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,237 reviews
Search Southwest 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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