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Cheap flights from Ontario to Louisville from $122

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 12/31. 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

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Find the cheapest flights from Ontario to Louisville

Cheap round-trip flights

United Airlines Logo
1:20 pm - 10:44 pmONT-SDF
6h 24m1 stop
United Airlines Logo
6:12 pm - 10:26 pmSDF-ONT
7h 14m1 stop
$243United Airlines
Find Deal
sáb., ene. 17 - sáb., ene. 24
United Airlines Logo
5:05 am - 7:43 pmONT-SDF
11h 38m2 stops
United Airlines Logo
3:22 pm - 8:58 pmSDF-ONT
8h 36m1 stop
$248United Airlines
Find Deal
sáb., ene. 17 - sáb., ene. 24
American Airlines Logo
6:41 am - 7:53 pmONT-SDF
10h 12m2 stops
American Airlines Logo
7:39 am - 2:57 pmSDF-ONT
10h 18m2 stops
$253American Airlines
Find Deal
sáb., ene. 17 - sáb., ene. 24
United Airlines Logo
1:15 pm - 10:30 pmONT-SDF
6h 15m1 stop
United Airlines Logo
8:00 am - 12:51 pmSDF-ONT
7h 51m1 stop
$260United Airlines
Find Deal
jue., oct. 2 - sáb., oct. 4
Logo
6:30 am - 4:15 pmONT-SDF
6h 45m1 stop
Logo
5:20 pm - 1:31 pmSDF-ONT
23h 11m1 stop
$262
Find Deal
jue., dic. 11 - dom., dic. 14
Logo
6:05 am - 2:02 pmONT-SDF
28h 57m1 stop
Logo
2:57 pm - 7:47 amSDF-ONT
19h 50m1 stop
$273
Find Deal
jue., oct. 9 - dom., oct. 12
Delta Logo
10:00 pm - 9:27 amONT-SDF
8h 27m1 stop
Delta Logo
5:58 pm - 10:22 pmSDF-ONT
7h 24m1 stop
$286Delta
Find Deal
vie., oct. 3 - lun., oct. 6
American Airlines Logo
11:59 pm - 11:45 amONT-SDF
8h 46m1 stop
American Airlines Logo
4:44 pm - 10:18 pmSDF-ONT
8h 34m1 stop
$295American Airlines
Find Deal
jue., oct. 2 - lun., oct. 6
Delta Logo
6:40 am - 11:08 pmONT-SDF
13h 28m2 stops
Delta Logo
2:29 pm - 11:59 pmSDF-ONT
12h 30m2 stops
$311Delta
Find Deal
jue., dic. 11 - dom., dic. 14
Southwest Logo
5:50 am - 6:40 pmONT-SDF
9h 50m1 stop
Southwest Logo
11:55 am - 3:05 pmSDF-ONT
6h 10m1 stop
$325Southwest
Find Deal
dom., feb. 1 - sáb., feb. 7

United Airlines flights from Ontario to Louisville

Our best United Airlines deals on Ontario to Louisville flight tickets
United Airlines
Jan 17
ONT1:20 pmOntario
6h 24m
1 stop
SDF10:44 pmLouisville Intl
Jan 24
SDF6:12 pmLouisville Intl
7h 14m
1 stop
ONT10:26 pmOntario
$243
Find similar
United Airlines
Jan 17
ONT5:05 amOntario
11h 38m
2 stops
SDF7:43 pmLouisville Intl
Jan 24
SDF3:22 pmLouisville Intl
8h 36m
1 stop
ONT8:58 pmOntario
$248
Find similar
United Airlines
Oct 2
ONT1:15 pmOntario
6h 15m
1 stop
SDF10:30 pmLouisville Intl
Oct 4
SDF8:00 amLouisville Intl
7h 51m
1 stop
ONT12:51 pmOntario
$260
Find similar

American Airlines flights from Ontario to Louisville

Our best American Airlines deals on Ontario to Louisville flight tickets
American Airlines
Jan 17
ONT6:41 amOntario
10h 12m
2 stops
SDF7:53 pmLouisville Intl
Jan 24
SDF7:39 amLouisville Intl
10h 18m
2 stops
ONT2:57 pmOntario
$253
Find similar
American Airlines
Oct 2
ONT11:59 pmOntario
8h 46m
1 stop
SDF11:45 amLouisville Intl
Oct 6
SDF4:44 pmLouisville Intl
8h 34m
1 stop
ONT10:18 pmOntario
$295
Find similar
American Airlines
Oct 2
ONT7:16 pmOntario
11h 08m
2 stops
SDF9:24 amLouisville Intl
Oct 6
SDF4:44 pmLouisville Intl
8h 34m
1 stop
ONT10:18 pmOntario
$331
Find similar

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 septiembre 11, 2025.
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

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

sáb. 1/17

1:20 pm-10:44 pm

1 stop6h 24m

Louisville Intl

sáb. 1/24

6:12 pm-10:26 pm

1 stop7h 14m

$243

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

sáb. 1/17

5:05 am-7:43 pm

2 stops11h 38m

Louisville Intl

sáb. 1/24

3:22 pm-8:58 pm

1 stop8h 36m

$248

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

sáb. 1/17

6:41 am-7:53 pm

2 stops10h 12m

Louisville Intl

sáb. 1/24

7:39 am-2:57 pm

2 stops10h 18m

$253

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

jue. 10/2

1:15 pm-10:30 pm

1 stop6h 15m

Louisville Intl

sáb. 10/4

8:00 am-12:51 pm

1 stop7h 51m

$260

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

jue. 12/11

6:30 am-4:15 pm

1 stop6h 45m

Louisville Intl

dom. 12/14

5:20 pm-1:31 pm

1 stop23h 11m

$262

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

jue. 10/9

6:05 am-2:02 pm

1 stop28h 57m

Louisville Intl

dom. 10/12

2:57 pm-7:47 am

1 stop19h 50m

$273

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

vie. 10/3

10:00 pm-9:27 am

1 stop8h 27m

Louisville Intl

lun. 10/6

5:58 pm-10:22 pm

1 stop7h 24m

$286

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

jue. 10/2

11:59 pm-11:45 am

1 stop8h 46m

Louisville Intl

lun. 10/6

4:44 pm-10:18 pm

1 stop8h 34m

$295

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

jue. 12/11

6:40 am-11:08 pm

2 stops13h 28m

Louisville Intl

dom. 12/14

2:29 pm-11:59 pm

2 stops12h 30m

$311

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

dom. 2/1

5:50 am-6:40 pm

1 stop9h 50m

Louisville Intl

sáb. 2/7

11:55 am-3:05 pm

1 stop6h 10m

$325

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 cheapest month to fly to Louisville?

If you are unable to visit Louisville during the month of February, then departing from Ontario during the month August is also very affordable. Most momondo users find prices during this month for around $373.

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 Friday. momondo users have found tickets for Friday departures for as low as $138. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Louisville on a Monday will generally be more expensive and average around $216. 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 evening is when there is more demand to fly to Louisville, so prices are often more expensive at around $366 per ticket.

Can stopping save me money on Ontario to Louisville flights?

You could potentially save up to 3% on your flight if you consider stops on a Ontario to Louisville flight.

How have Ontario to Louisville flight prices changed over time?

As of September 2025, prices for Ontario to Louisville flights are approximately 26% more expensive when compared to flights at the same time last year.

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

Direct flights

None
There are no direct flights from Ontario to Louisville. There are no popular flight routes from Ontario to Louisville.
Search flight deals

  • 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 44m 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
SouthwestPriceFrom $342Free CancellationRating
8.0
4,248 reviews
Search Southwest flights
American AirlinesPriceFrom $342Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $346Free CancellationRating
7.9
7,960 reviews
Search Delta flights
United AirlinesPriceFrom $378Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights

  • United Airlines Flights From Ontario to Louisville

    United Airlines flies from Ontario to Louisville around 7 times per week, with 8,937 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Ontario to Louisville in the last 72 hours was $378 (round-trip), much lower than the average airfare cost of $556 for United Airlines flights on this route.

Traveling to a place near Louisville?

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

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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sáb. 10/11
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