$164+ Cheap flights from Ontario to Louisville (ONT - SDF)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
Sep 30 — Oct 71
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ontario to Louisville with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Louisville
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to LouisvilleExplore the most affordable flight options available from Ontario to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.
Explore the most affordable flight options available from Ontario to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.
This Southwest deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:45 am -
1 stop8h 25m
Mon 12/710:15 am -
1 stop8h 55m
Deal found 8/27![Southwest logo]()
$317
This Southwest deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:30 am -
1 stop5h 25m
Mon 10/1912:50 pm -
1 stop11h 10m
Deal found 8/27![Southwest logo]()
$322
This Southwest deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:30 pm -
2 stops9h 40m
Mon 10/56:35 am -
2 stops13h 05m
Deal found 8/27![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:25 am -
1 stop11h 35m
Mon 10/1912:50 pm -
1 stop11h 10m
Deal found 8/31![Southwest logo]()
$373
This Delta deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:17 pm -
1 stop6h 42m
Fri 9/187:05 am -
1 stop7h 00m
Deal found 8/27![Delta logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:07 pm -
1 stop28h 12m
Mon 10/511:39 am -
2 stops32h 20m
Deal found 8/28![Multiple Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:35 pm -
1 stop6h 25m
Fri 10/2310:50 am -
1 stop6h 10m
Deal found 8/30![Southwest logo]()
$407
This American Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2610:30 pm -
1 stop9h 45m
Tue 12/16:11 pm -
1 stop8h 09m
Deal found 8/27![American Airlines logo]()
$409
Best flights from Ontario to LouisvilleDiscover carefully curated flight deals from Ontario to Louisville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.
Discover carefully curated flight deals from Ontario to Louisville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:18 pm -
1 stop6h 11m
Sat 9/263:37 pm -
1 stop9h 22m
Deal found 8/26![United Airlines logo]()
$417
This Southwest deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:40 am -
2 stops8h 55m
Mon 12/78:50 am -
2 stops8h 50m
Deal found 8/28![Southwest logo]()
$417
This Delta deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2010:29 pm -
1 stop8h 06m
Mon 1/43:24 pm -
1 stop9h 50m
Deal found 8/30![Delta logo]()
$513
This Southwest deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:25 am -
2 stops7h 10m
Tue 11/36:50 am -
2 stops8h 05m
Deal found 8/28![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:30 pm -
2 stops9h 35m
Fri 10/238:20 am -
2 stops10h 20m
Deal found 8/28![Southwest logo]()
$443
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:30 pm -
2 stops9h 40m
Sun 10/256:30 am -
2 stops8h 40m
Deal found 8/31![Southwest logo]()
$447
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/205:00 am -
2 stops10h 47m
Tue 1/52:08 pm -
2 stops9h 12m
Deal found 8/30![United Airlines logo]()
$547
This Delta deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:15 pm -
1 stop6h 42m
Sun 11/86:00 am -
1 stop8h 06m
Deal found 8/29![Delta logo]()
$563
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:00 am -
1 stop6h 29m
Thu 9/173:25 pm -
1 stop8h 28m
Deal found 8/27![United Airlines logo]()
$552
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/141:18 pm -
1 stop6h 11m
Sat 9/193:25 pm -
1 stop8h 28m
Deal found 8/27![United Airlines logo]()
$552
This United Airlines deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/151:00 pm -
1 stop5h 57m
Mon 1/183:50 pm -
1 stop8h 50m
Deal found 8/29![United Airlines logo]()
$567
This United Airlines deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:00 am -
1 stop6h 29m
Wed 9/168:00 am -
1 stop7h 50m
Deal found 8/29![United Airlines logo]()
$596
Last-minute flights from Ontario to LouisvilleDiscover last-minute flight deals from Ontario to Louisville. Data last updated August 31, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Louisville. Data last updated August 31, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:00 am -
2 stops9h 59m
Wed 9/91:56 pm -
2 stops9h 57m
Deal found 8/26![United Airlines logo]()
$471
This American Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:25 am -
1 stop8h 18m
Sat 9/126:00 am -
1 stop8h 47m
Deal found 8/27![American Airlines logo]()
$411
This Delta deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:17 pm -
1 stop6h 42m
Fri 9/187:05 am -
1 stop7h 00m
Deal found 8/27![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:00 am -
1 stop6h 29m
Sat 9/196:15 pm -
1 stop7h 44m
Deal found 8/27![United Airlines logo]()
$464
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/109:01 am -
2 stops11h 55m
Thu 9/173:25 pm -
1 stop8h 28m
Deal found 8/27![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:18 pm -
1 stop6h 11m
Sat 9/263:37 pm -
1 stop9h 22m
Deal found 8/26![United Airlines logo]()
$417
This American Airlines deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:37 pm -
1 stop7h 48m
Sat 9/264:19 pm -
1 stop6h 50m
Deal found 8/28![American Airlines logo]()
$467
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:55 am -
1 stop8h 40m
Wed 10/76:25 am -
1 stop7h 20m
Deal found 8/31![Southwest logo]()
$407
One-way flights from Ontario to LouisvilleSearch for one-way flight options from Ontario to Louisville. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.
Search for one-way flight options from Ontario to Louisville. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:30 pm -
2 stops9h 40m
Deal found 8/31![Southwest logo]()
$164
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:55 pm -
1 stop7h 25m
Deal found 8/31![Southwest logo]()
$174
This Southwest deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1311:55 pm -
1 stop7h 10m
Deal found 8/29![Southwest logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:24 pm -
2 stops11h 35m
Deal found 8/30![Multiple Airlines logo]()
$205
This Delta deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:00 pm -
1 stop7h 08m
Deal found 8/29![Delta logo]()
$206
This Southwest deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:15 am -
2 stops8h 00m
Deal found 8/28![Southwest logo]()
$209
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:00 am -
2 stops12h 52m
Deal found 8/26![United Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:52 am -
3 stops42h 53m
Deal found 8/29![Multiple Airlines logo]()
$218
This Delta deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:07 am -
1 stop9h 03m
Deal found 8/29![Delta logo]()
$230
This Southwest deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:30 pm -
2 stops9h 35m
Deal found 8/29![Southwest logo]()
$239
Find flight deals from Ontario to Louisville
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Louisville (SDF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $317 (Southwest) |
One-way from | $164 (Southwest) |
Popular in | January |
Cheapest in | August |
Average price | $429 |
Cheapflights 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, Cheapflights users made 7,457,451 searches. Data last updated August 31, 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
Cheapest round-trip
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sat 9/19
1:18 pm-10:29 pm
1 stop6h 11m
Louisville Intl
Sat 9/26
3:37 pm-9:59 pm
1 stop9h 22m
$417
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Thu 12/3
8:40 am-8:35 pm
2 stops8h 55m
Louisville Intl
Mon 12/7
8:50 am-2:40 pm
2 stops8h 50m
$417
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Wed 10/21
10:25 am-8:35 pm
2 stops7h 10m
Louisville Intl
Tue 11/3
6:50 am-11:55 am
2 stops8h 05m
$417
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Mon 10/19
9:30 pm-10:05 am
2 stops9h 35m
Louisville Intl
Fri 10/23
8:20 am-3:40 pm
2 stops10h 20m
$443
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Thu 10/22
9:30 pm-10:10 am
2 stops9h 40m
Louisville Intl
Sun 10/25
6:30 am-12:10 pm
2 stops8h 40m
$447
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 12/20
10:29 pm-9:35 am
1 stop8h 06m
Louisville Intl
Mon 1/4
3:24 pm-10:14 pm
1 stop9h 50m
$513
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 12/20
5:00 am-6:47 pm
2 stops10h 47m
Louisville Intl
Tue 1/5
2:08 pm-8:20 pm
2 stops9h 12m
$547
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 9/13
5:00 am-2:29 pm
1 stop6h 29m
Louisville Intl
Thu 9/17
3:25 pm-8:53 pm
1 stop8h 28m
$552
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Mon 9/14
1:18 pm-10:29 pm
1 stop6h 11m
Louisville Intl
Sat 9/19
3:25 pm-8:53 pm
1 stop8h 28m
$552
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 10/25
11:15 pm-8:57 am
1 stop6h 42m
Louisville Intl
Sun 11/8
6:00 am-11:06 am
1 stop8h 06m
$563
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Ontario to Louisville
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Louisville in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Louisville flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Louisville flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Louisville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Louisville
Have a flexible travel schedule? Discover the best time to fly to Louisville from Ontario with our price prediction graph.
ONT-SDF
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Louisville
What is the cheapest month to book a flight from Ontario to Louisville?
Currently, August is the cheapest month in which you can book a flight from Ontario to Louisville (average of $429). Flying from Ontario to Louisville in January is currently the most expensive (average of $976). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Ontario to Louisville?
Airfare is below average for this route at the moment.
Ontario to Louisville flights typically cost between $354 and $532 in December.The cheapest round-trip price found within the last 5 days was $317 on Southwest (Dec 3-Dec 7).
Reviews of airlines servicing Louisville
Get insights into the airlines that provide service to Louisville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Louisville. Reviews last updated August 31, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Ontario to Louisville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Louisville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Louisville?
Book flights to Louisville if you plan to visit one of these locationsCorydon
Shepherdsville
Elizabethtown
Jeffersonville
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Louisville flight routes
Other flight options
Other flights from Ontario
Popular flights
Alternative routes for Ontario to Louisville
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Louisville by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Louisville by cabin class
Find flights from Ontario to Louisville, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Louisville
Explore flights to Louisville departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 31, 2026.
Ontario and Louisville flights
Browse other Ontario and Louisville flight options. Last updated on August 31, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on August 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Ontario to Louisville
Discover the top 4 airlines that operate flights from Ontario to Louisville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$288 | Average$465 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$303 | Average$516 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$314 | Average$482 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$350 | Average$472 | FlexibilityNo cancel fee | On-time63% |