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Cheap flights from Ontario to Louisville from $172

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 8/4. 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

American Airlines Logo
12:45 pm - 11:34 pmONT-SDF
7h 49m1 stop
American Airlines Logo
6:17 pm - 12:15 amSDF-ONT
8h 58m1 stop
$343American Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
American Airlines Logo
7:16 pm - 9:24 amONT-SDF
11h 08m2 stops
American Airlines Logo
3:46 pm - 8:04 pmSDF-ONT
7h 18m1 stop
$348American Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
Southwest Logo
5:20 am - 3:30 pmONT-SDF
7h 10m1 stop
Southwest Logo
6:20 am - 9:35 amSDF-ONT
6h 15m1 stop
$366Southwest
Find Deal
Thu, Aug 21 - Sun, Aug 24
Southwest Logo
12:55 pm - 11:40 pmONT-SDF
7h 45m2 stops
Southwest Logo
6:20 am - 9:35 amSDF-ONT
6h 15m1 stop
$371Southwest
Find Deal
Thu, Aug 21 - Sun, Aug 24
United Airlines Logo
5:10 am - 2:34 pmONT-SDF
6h 24m1 stop
United Airlines Logo
3:30 pm - 8:43 pmSDF-ONT
8h 13m1 stop
$384United Airlines
Find Deal
Fri, Aug 22 - Sun, Aug 24
United Airlines Logo
5:10 am - 2:28 pmONT-SDF
6h 18m1 stop
United Airlines Logo
9:31 am - 12:32 pmSDF-ONT
6h 01m1 stop
$428United Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 23
Delta Logo
11:40 am - 12:32 amONT-SDF
9h 52m1 stop
Delta Logo
5:53 pm - 10:27 pmSDF-ONT
7h 34m1 stop
$430Delta
Find Deal
Sun, Jul 27 - Mon, Aug 4
Delta Logo
10:05 pm - 8:50 amONT-SDF
7h 45m1 stop
Delta Logo
5:53 pm - 10:27 pmSDF-ONT
7h 34m1 stop
$432Delta
Find Deal
Sun, Jul 27 - Wed, Jul 30
Alaska Airlines Logo
7:10 am - 11:40 pmONT-SDF
13h 30m2 stops
Alaska Airlines Logo
10:00 am - 6:36 pmSDF-ONT
11h 36m2 stops
$447Alaska Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 23
Alaska Airlines Logo
7:10 am - 10:52 pmONT-SDF
12h 42m2 stops
Alaska Airlines Logo
12:15 pm - 11:53 pmSDF-ONT
14h 38m2 stops
$517Alaska Airlines
Find Deal
Fri, Aug 22 - Mon, Aug 25

Southwest flights from Ontario to Louisville

Our best Southwest deals on Ontario to Louisville flight tickets
Southwest
Aug 21
ONT5:20 amOntario
7h 10m
1 stop
SDF3:30 pmLouisville Intl
Aug 24
SDF6:20 amLouisville Intl
6h 15m
1 stop
ONT9:35 amOntario
Southwest
Aug 21
ONT12:55 pmOntario
7h 45m
2 stops
SDF11:40 pmLouisville Intl
Aug 24
SDF6:20 amLouisville Intl
6h 15m
1 stop
ONT9:35 amOntario
Southwest
Aug 21
ONT12:55 pmOntario
7h 45m
2 stops
SDF11:40 pmLouisville Intl
Aug 24
SDF7:00 amLouisville Intl
9h 05m
2 stops
ONT1:05 pmOntario

United Airlines flights from Ontario to Louisville

Our best United Airlines deals on Ontario to Louisville flight tickets
United Airlines
Aug 22
ONT5:10 amOntario
6h 24m
1 stop
SDF2:34 pmLouisville Intl
Aug 24
SDF3:30 pmLouisville Intl
8h 13m
1 stop
ONT8:43 pmOntario
United Airlines
Sep 16
ONT5:10 amOntario
6h 18m
1 stop
SDF2:28 pmLouisville Intl
Sep 23
SDF9:31 amLouisville Intl
6h 01m
1 stop
ONT12:32 pmOntario
United Airlines
Sep 11
ONT1:15 pmOntario
6h 15m
1 stop
SDF10:30 pmLouisville Intl
Sep 16
SDF3:35 pmLouisville Intl
8h 50m
1 stop
ONT9:25 pmOntario

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 August, then departing from Ontario during the month February is also very affordable. Most momondo users find prices during this month for around $371.

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 $227. 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 in the morning. Our users have found flights to Louisville in the morning for as low as $192. In the evening is when there is more demand to fly to Louisville, so prices are often more expensive at around $366 per ticket.

How far in advance should I book a flight to Louisville?

You are more likely to see cheaper flights to Louisville from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Louisville for around $472 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Louisville from Ontario for as low as $346 on momondo.

Can stopping save me money on Ontario to Louisville flights?

You could potentially save up to 51% 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 July 2025, prices for Ontario to Louisville flights are approximately 12% 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

Best Price Found

$172

Fastest flight time

5h 39m

Direct flights

None

Airports in Louisville

1 airport
The best one-way flight to Louisville from Ontario in the past 72 hours is $172. The best round-trip flight deal from Ontario to Louisville found on momondo in the last 72 hours is $343.
The fastest flight from Ontario to Louisville takes 5h 39m
There are no direct flights from Ontario to Louisville. Popular non-direct route for this connection is Ontario Airport - Louisville Intl Airport.
There is 1 airport near Louisville: Louisville Intl (SDF)

  • 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 39m 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
DeltaPriceFrom $326Free CancellationRating
8.0
7,983 reviews
Search Delta flights
American AirlinesPriceFrom $326Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $354Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights
SouthwestPriceFrom $367Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
  • Southwest Flights From Ontario to Louisville

    Southwest flies from Ontario to Louisville around 4 times per week, with 4,272 momondo users rating the airline 8.0/10. The cheapest Southwest deal from Ontario to Louisville in the last 72 hours was $367 (round-trip), much lower than the average airfare cost of $472 for Southwest flights on this route.

  • United Airlines Flights From Ontario to Louisville

    $354 is the best United Airlines flight deal from Ontario to Louisville found on momondo over the last 72 hours. The average United Airlines ticket price found was closer to $505, however, with flight time and availability significantly affecting the price. United Airlines (7.4/10 from 8,858 user reviews) flies into Louisville from Ontario 7 times in an average week so prices can vary.


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
Elizabeth
Corydon
Charlestown
Georgetown
Springfield
Brandenburg

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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