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Cheap flights from Ontario to Louisville from $171

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Louisville departing on 9/9. 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 Ontario to Louisville

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
12:37 pm - 9:43 pmONT  Ontario-SDF Louisville Intl
6h 06m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 9:29 amSDF  Louisville Intl-ONT Ontario
6h 29m1 stop Dallas/Fort Worth
$267American Airlines
Wed, Sep 9 - Sat, Sep 12
Southwest Logo
11:55 pm - 10:05 amONT  Ontario-SDF Louisville Intl
7h 10m1 stop Chicago Midway
Southwest Logo
3:00 pm - 8:45 pmSDF  Louisville Intl-ONT Ontario
8h 45m1 stop Dallas Love Field
$267Southwest
Tue, Oct 20 - Tue, Oct 27
Southwest Logo
11:55 pm - 10:05 amONT  Ontario-SDF Louisville Intl
7h 10m1 stop Chicago Midway
Southwest Logo
2:05 pm - 8:45 pmSDF  Louisville Intl-ONT Ontario
9h 40m2 stops Chicago Midway Dallas Love Field
$272Southwest
Tue, Oct 20 - Tue, Oct 27
American Airlines Logo
12:37 pm - 9:43 pmONT  Ontario-SDF Louisville Intl
6h 06m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 12:03 pmSDF  Louisville Intl-ONT Ontario
9h 03m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
$272American Airlines
Wed, Sep 9 - Sat, Sep 12
Delta Logo
12:17 pm - 9:59 pmONT  Ontario-SDF Louisville Intl
6h 42m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:05 am - 11:05 amSDF  Louisville Intl-ONT Ontario
7h 00m1 stop Atlanta Hartsfield-Jackson
$277Delta
Sat, Sep 12 - Wed, Sep 16
Delta Logo
12:17 pm - 9:59 pmONT  Ontario-SDF Louisville Intl
6h 42m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:05 am - 11:05 amSDF  Louisville Intl-ONT Ontario
7h 00m1 stop Atlanta Hartsfield-Jackson
$277Delta
Wed, Sep 9 - Tue, Sep 15
United Airlines Logo
5:00 am - 2:29 pmONT  Ontario-SDF Louisville Intl
6h 29m1 stop Denver Intl
United Airlines Logo
3:25 pm - 8:53 pmSDF  Louisville Intl-ONT Ontario
8h 28m1 stop Denver Intl
$289United Airlines
Sat, Sep 5 - Fri, Sep 11
United Airlines Logo
5:00 am - 2:29 pmONT  Ontario-SDF Louisville Intl
6h 29m1 stop Denver Intl
United Airlines Logo
11:00 am - 8:01 pmSDF  Louisville Intl-ONT Ontario
12h 01m2 stops Chicago O'Hare Intl San Francisco
$294United Airlines
Sat, Sep 5 - Fri, Sep 11
Multiple Airlines Logo
8:32 pm - 10:59 amONT  Ontario-SDF Louisville Intl
11h 27m2 stops Las Vegas Harry Reid Intl New Orleans Louis Armstrong
Multiple Airlines Logo
8:47 am - 9:10 amSDF  Louisville Intl-ONT Ontario
27h 23m1 stop San Francisco
$383Multiple Airlines
Thu, Dec 3 - Mon, Dec 7
Multiple Airlines Logo
11:45 am - 4:34 pmONT  Ontario-SDF Louisville Intl
25h 49m2 stops Denver Intl Orlando
Multiple Airlines Logo
8:47 am - 7:36 pmSDF  Louisville Intl-ONT Ontario
13h 49m1 stop San Francisco
$436Multiple Airlines
Wed, Sep 16 - Mon, Sep 28

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American Airlines flights from Ontario to Louisville

Our best American Airlines deals on Ontario to Louisville flight tickets
American Airlines
Sep 9
ONT12:37 pmOntario
6h 06m
1 stop
SDF9:43 pmLouisville Intl
Sep 12
SDF6:00 amLouisville Intl
6h 29m
1 stop
ONT9:29 amOntario
$267
American Airlines
Sep 9
ONT12:37 pmOntario
6h 06m
1 stop
SDF9:43 pmLouisville Intl
Sep 12
SDF6:00 amLouisville Intl
9h 03m
2 stops
ONT12:03 pmOntario
$272
American Airlines
Sep 9
ONT12:37 pmOntario
6h 06m
1 stop
SDF9:43 pmLouisville Intl
Sep 12
SDF11:46 amLouisville Intl
9h 31m
2 stops
ONT6:17 pmOntario
$282

Southwest flights from Ontario to Louisville

Our best Southwest deals on Ontario to Louisville flight tickets
Southwest
Dec 10
ONT8:40 amOntario
5h 30m
1 stop
SDF5:10 pmLouisville Intl
Dec 14
SDF10:15 amLouisville Intl
8h 55m
1 stop
ONT4:10 pmOntario
$300
Southwest
Nov 26
ONT6:40 amOntario
6h 00m
1 stop
SDF3:40 pmLouisville Intl
Dec 1
SDF10:15 amLouisville Intl
8h 55m
1 stop
ONT4:10 pmOntario
$313
Southwest
Dec 3
ONT8:40 amOntario
7h 15m
1 stop
SDF6:55 pmLouisville Intl
Dec 7
SDF12:10 pmLouisville Intl
8h 30m
2 stops
ONT5:40 pmOntario
$326

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Louisville 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 August 16, 2026.
Use the filters below to find and compare flights from Ontario to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Wed 9/9

12:37 pm-9:43 pm

1 stop6h 06m

Louisville Intl

Sat 9/12

6:00 am-9:29 am

1 stop6h 29m

$267

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Tue 10/20

11:55 pm-10:05 am

1 stop7h 10m

Louisville Intl

Tue 10/27

3:00 pm-8:45 pm

1 stop8h 45m

$267

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Tue 10/20

11:55 pm-10:05 am

1 stop7h 10m

Louisville Intl

Tue 10/27

2:05 pm-8:45 pm

2 stops9h 40m

$272

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Wed 9/9

12:37 pm-9:43 pm

1 stop6h 06m

Louisville Intl

Sat 9/12

6:00 am-12:03 pm

2 stops9h 03m

$272

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Sat 9/12

12:17 pm-9:59 pm

1 stop6h 42m

Louisville Intl

Wed 9/16

7:05 am-11:05 am

1 stop7h 00m

$277

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Wed 9/9

12:17 pm-9:59 pm

1 stop6h 42m

Louisville Intl

Tue 9/15

7:05 am-11:05 am

1 stop7h 00m

$277

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Sat 9/5

5:00 am-2:29 pm

1 stop6h 29m

Louisville Intl

Fri 9/11

3:25 pm-8:53 pm

1 stop8h 28m

$289

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Sat 9/5

5:00 am-2:29 pm

1 stop6h 29m

Louisville Intl

Fri 9/11

11:00 am-8:01 pm

2 stops12h 01m

$294

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Thu 12/3

8:32 pm-10:59 am

2 stops11h 27m

Louisville Intl

Mon 12/7

8:47 am-9:10 am

1 stop27h 23m

$383

OntarioLouisville

ONT Ontario - SDF Louisville Intl

ONTSDF

Ontario

Wed 9/16

11:45 am-4:34 pm

2 stops25h 49m

Louisville Intl

Mon 9/28

8:47 am-7:36 pm

1 stop13h 49m

$436

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Louisville from

How to get the cheapest flight ticket from Ontario to Louisville

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 Ontario and Louisville?

Prices are currently low for flights on this route.

Typical prices usually range from $314 to $726.
The lowest price recently found on this route was $267.

What is the cheapest month to fly to Louisville?

If you are unable to visit Louisville during the month of August, then departing from Ontario during the month February is also very affordable. Most momondo users find prices during this month for around $448.

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

On average, the least expensive day to fly to Louisville from Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $179. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Louisville on a Thursday will generally be more expensive and average around $676. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest Ontario to Louisville flights are usually those with departure times at noon. Our users have found flights to Louisville at noon for as low as $132. In the morning is when there is more demand to fly to Louisville, so prices are often more expensive at around $358 per ticket.

How have Ontario to Louisville flight prices changed over time?

When to book flights from Ontario to Louisville

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

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

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

Fastest flight time

5h 57m

Direct flights

None
The fastest flight from Ontario to Louisville takes 5h 57m
There are no direct flights from Ontario to Louisville. There are no popular flight routes from Ontario to Louisville.
Search flight deals

Frequently asked questions about flying from Ontario to Louisville

  • How far is Ontario to Louisville Intl by plane?

    The straight-line distance from Ontario to Louisville Intl is 1792.4 mi. Typically, this will take 5h 57m by plane in normal conditions.

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

    Prices for flights from Ontario Airport to Louisville Intl Airport are updated daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Louisville Intl Airport.

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

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

Best airlines flying from Ontario to Louisville

Compare and see reviews for airlines that fly from Ontario to Louisville with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $289Free CancellationRating
7.1
11,950 reviews
Search American Airlines flights
DeltaPriceFrom $303Free CancellationRating
7.8
8,502 reviews
Search Delta flights
United AirlinesPriceFrom $320Free CancellationRating
7.4
10,104 reviews
Search United Airlines flights
SouthwestPriceFrom $353Free CancellationRating
8.0
4,217 reviews
Search Southwest flights

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
French Lick
Elizabethtown
Jeffersonville
West Baden Springs
Bardstown
New Albany
Shepherdsville
Elizabeth
Charlestown
Corydon
Brandenburg
Georgetown
Springfield

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Louisville from Ontario.

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

Flights from Ontario to Louisville with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Ontario and Louisville by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to Louisville from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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