Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Louisville to Los Angeles from $145

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 8/13. 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
11:05 am - 3:05 pm
SDF
-
ONT
7h 00m
1 stop
Southwest Logo
6:55 am - 3:55 pm
ONT
-
SDF
6h 00m
1 stop
$289Southwest
Thu, Sep 10 - Sat, Sep 12
Southwest Logo
3:20 pm - 8:25 pm
SDF
-
ONT
8h 05m
2 stops
Southwest Logo
11:55 pm - 11:15 am
ONT
-
SDF
8h 20m
1 stop
$294Southwest
Thu, Sep 10 - Mon, Sep 14
Delta Logo
7:05 am - 10:42 am
SDF
-
ONT
6h 37m
1 stop
Delta Logo
12:00 pm - 10:08 pm
ONT
-
SDF
7h 08m
1 stop
$299Delta
Wed, Sep 2 - Sat, Sep 5
Southwest Logo
10:50 am - 10:05 pm
SDF
-
ONT
14h 15m
2 stops
Southwest Logo
2:40 pm - 11:05 pm
ONT
-
SDF
5h 25m
1 stop
$300Southwest
Wed, Aug 12 - Mon, Aug 17
Delta Logo
7:05 am - 10:42 am
SDF
-
ONT
6h 37m
1 stop
Delta Logo
12:17 pm - 9:59 pm
ONT
-
SDF
6h 42m
1 stop
$304Delta
Sun, Sep 6 - Sat, Sep 12
Southwest Logo
6:45 am - 11:25 am
SDF
-
ONT
7h 40m
2 stops
Southwest Logo
2:40 pm - 11:05 pm
ONT
-
SDF
5h 25m
1 stop
$317Southwest
Thu, Aug 20 - Thu, Aug 27
Southwest Logo
3:20 pm - 8:20 pm
SDF
-
ONT
8h 00m
2 stops
Southwest Logo
7:05 am - 5:15 pm
ONT
-
SDF
7h 10m
2 stops
$322Southwest
Thu, Sep 10 - Sat, Sep 12
Delta Logo
7:00 am - 11:27 am
SDF
-
ONT
7h 27m
1 stop
Delta Logo
7:00 am - 7:01 pm
ONT
-
SDF
9h 01m
1 stop
$325Delta
Tue, Jan 5 - Tue, Feb 2
Southwest Logo
6:45 am - 3:30 pm
SDF
-
ONT
11h 45m
1 stop
Southwest Logo
11:55 pm - 11:20 am
ONT
-
SDF
8h 25m
1 stop
$344Southwest
Thu, Sep 3 - Mon, Sep 7
Southwest Logo
3:20 pm - 8:20 pm
SDF
-
ONT
8h 00m
2 stops
Southwest Logo
5:50 am - 5:25 pm
ONT
-
SDF
8h 35m
2 stops
$349Southwest
Thu, Sep 10 - Sat, Sep 12

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

United Airlines flights from Louisville to Ontario

Our best United Airlines deals on Louisville to Ontario flight tickets
United Airlines
Aug 24
SDF3:35 pmLouisville Intl
9h 24m
1 stop
ONT9:59 pmOntario
Aug 29
ONT1:18 pmOntario
6h 13m
1 stop
SDF10:31 pmLouisville Intl
$389
United Airlines
Sep 5
SDF9:00 amLouisville Intl
12h 12m
2 stops
ONT6:12 pmOntario
Sep 8
ONT1:18 pmOntario
6h 11m
1 stop
SDF10:29 pmLouisville Intl
$394
United Airlines
Sep 5
SDF9:00 amLouisville Intl
12h 12m
2 stops
ONT6:12 pmOntario
Sep 6
ONT7:00 amOntario
9h 07m
1 stop
SDF7:07 pmLouisville Intl
$399

Southwest flights from Louisville to Ontario

Our best Southwest deals on Louisville to Ontario flight tickets
Southwest
Sep 10
SDF11:05 amLouisville Intl
7h 00m
1 stop
ONT3:05 pmOntario
Sep 12
ONT6:55 amOntario
6h 00m
1 stop
SDF3:55 pmLouisville Intl
$289
Southwest
Sep 10
SDF3:20 pmLouisville Intl
8h 05m
2 stops
ONT8:25 pmOntario
Sep 14
ONT11:55 pmOntario
8h 20m
1 stop
SDF11:15 amLouisville Intl
$294
Southwest
Aug 12
SDF10:50 amLouisville Intl
14h 15m
2 stops
ONT10:05 pmOntario
Aug 17
ONT2:40 pmOntario
5h 25m
1 stop
SDF11:05 pmLouisville Intl
$300

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 July 26, 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
Quickest round-trip

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 9/10

11:05 am-3:05 pm

1 stop7h 00m

Ontario

Sat 9/12

6:55 am-3:55 pm

1 stop6h 00m

$289

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 9/10

3:20 pm-8:25 pm

2 stops8h 05m

Ontario

Mon 9/14

11:55 pm-11:15 am

1 stop8h 20m

$294

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 9/2

7:05 am-10:42 am

1 stop6h 37m

Ontario

Sat 9/5

12:00 pm-10:08 pm

1 stop7h 08m

$299

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 8/12

10:50 am-10:05 pm

2 stops14h 15m

Ontario

Mon 8/17

2:40 pm-11:05 pm

1 stop5h 25m

$300

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sun 9/6

7:05 am-10:42 am

1 stop6h 37m

Ontario

Sat 9/12

12:17 pm-9:59 pm

1 stop6h 42m

$304

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 8/20

6:45 am-11:25 am

2 stops7h 40m

Ontario

Thu 8/27

2:40 pm-11:05 pm

1 stop5h 25m

$317

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 9/10

3:20 pm-8:20 pm

2 stops8h 00m

Ontario

Sat 9/12

7:05 am-5:15 pm

2 stops7h 10m

$322

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 1/5

7:00 am-11:27 am

1 stop7h 27m

Ontario

Tue 2/2

7:00 am-7:01 pm

1 stop9h 01m

$325

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 9/3

6:45 am-3:30 pm

1 stop11h 45m

Ontario

Mon 9/7

11:55 pm-11:20 am

1 stop8h 25m

$344

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 9/10

3:20 pm-8:20 pm

2 stops8h 00m

Ontario

Sat 9/12

5:50 am-5:25 pm

2 stops8h 35m

$349

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Los Angeles from

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?

Prices are currently low for flights on this route.

Typical prices usually range from $422 to $500.
The lowest price recently found on this route was $289.

What is the cheapest month to fly to Ontario?

In general, March 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 $359. If you aren’t able to travel during the month of March, then book flights to Ontario from Louisville during February instead. Flights to Ontario in February, while not as cheap as those in March, still average around $378.

How have Louisville to Ontario flight prices changed over time?

As of July 2026, prices for Louisville to Ontario flights are approximately 18% 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

7h 00m

Direct flights

None
The fastest flight from Louisville to Ontario takes 7h 00m
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 7h 00m.

  • 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
11,845 reviews
Search American Airlines flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,231 reviews
Search Southwest flights

  • Southwest Flights From Louisville to Ontario

    Across 3 Southwest flights from Louisville to Ontario this week, the average price was $482, with the best Southwest deals starting from $306 round-trip. 4,231 users have rated Southwest on momondo, with an average score of 8.0/10.

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.

An easier way to manage your Ontario 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/25
Tue 9/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States