$123+ Cheap flights from Ontario to Louisville (ONT - SDF)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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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
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Best
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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 October 30, 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 October 30, 2026.
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/112:20 pm -
1 stop6h 31m
Thu 12/36:00 am -
1 stop8h 07m
Deal found 10/26![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 11/165:00 am -
1 stop6h 22m
Thu 11/197:00 am -
2 stops11h 33m
Deal found 10/26![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:10 pm -
1 stop6h 56m
Thu 11/196:00 am -
1 stop8h 03m
Deal found 10/26![Delta logo]()
$390
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/191:29 pm -
1 stop5h 55m
Sat 12/51:59 pm -
1 stop7h 45m
Deal found 10/27![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:29 pm -
1 stop5h 55m
Wed 12/29:00 am -
2 stops11h 36m
Deal found 10/28![United Airlines logo]()
$424
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/255:44 am -
1 stop6h 18m
Wed 12/301:32 pm -
1 stop8h 18m
Deal found 10/28![American Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 10/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/201:00 pm -
1 stop8h 10m
Mon 12/287:15 pm -
2 stops7h 40m
Deal found 10/26![Southwest logo]()
$442
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:29 pm -
1 stop5h 55m
Thu 11/263:45 pm -
1 stop6h 57m
Deal found 10/28![United Airlines logo]()
$450
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:29 pm -
1 stop5h 55m
Wed 11/253:24 pm -
2 stops10h 24m
Deal found 10/28![United Airlines logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:01 pm -
1 stop28h 18m
Mon 11/98:47 am -
1 stop13h 43m
Deal found 10/27![Multiple Airlines logo]()
$457
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 October 30, 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 October 30, 2026.
This Delta deal was found by Cheapflights users on 10/29. 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.
Fri 2/57:05 am -
1 stop6h 57m
Tue 2/93:59 pm -
1 stop8h 44m
Deal found 10/29![Delta logo]()
$361
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/191:29 pm -
1 stop5h 55m
Thu 11/263:45 pm -
1 stop6h 57m
Deal found 10/27![United Airlines logo]()
$419
This Delta deal was found by Cheapflights users on 10/29. 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.
Thu 2/41:09 pm -
1 stop7h 50m
Fri 2/57:00 am -
1 stop7h 55m
Deal found 10/29![Delta logo]()
$390
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:10 pm -
1 stop6h 56m
Thu 11/196:00 am -
1 stop8h 03m
Deal found 10/26![Delta logo]()
$390
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:10 pm -
1 stop6h 56m
Wed 11/186:00 am -
1 stop8h 03m
Deal found 10/28![Delta logo]()
$463
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 4/161:00 pm -
1 stop5h 57m
Tue 4/203:20 pm -
1 stop8h 00m
Deal found 10/30![United Airlines logo]()
$579
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:00 am -
1 stop8h 32m
Thu 11/193:24 pm -
1 stop8h 27m
Deal found 10/28![United Airlines logo]()
$583
This United Airlines deal was found by Cheapflights users on 10/26. 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 4/131:00 pm -
1 stop5h 57m
Fri 4/167:05 am -
2 stops13h 42m
Deal found 10/26![United Airlines logo]()
$584
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 11/115:00 am -
1 stop6h 22m
Wed 12/29:00 am -
2 stops14h 38m
Deal found 10/27![United Airlines logo]()
$585
Last-minute flights from Ontario to LouisvilleDiscover last-minute flight deals from Ontario to Louisville. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Louisville. Data last updated October 30, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:01 pm -
1 stop28h 18m
Mon 11/98:47 am -
1 stop13h 43m
Deal found 10/27![Multiple Airlines logo]()
$457
This Southwest deal was found by Cheapflights users on 10/28. 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.
Sun 11/156:55 am -
1 stop5h 30m
Wed 11/1810:15 am -
1 stop8h 55m
Deal found 10/28![Southwest logo]()
$458
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 11/165:00 am -
1 stop6h 22m
Thu 11/197:00 am -
2 stops11h 33m
Deal found 10/26![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:10 pm -
1 stop6h 56m
Thu 11/196:00 am -
1 stop8h 03m
Deal found 10/26![Delta logo]()
$390
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:10 pm -
1 stop6h 56m
Wed 11/186:00 am -
1 stop8h 03m
Deal found 10/28![Delta logo]()
$463
This Southwest deal was found by Cheapflights users on 10/28. 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 11/168:40 am -
2 stops9h 00m
Wed 11/1810:15 am -
1 stop8h 55m
Deal found 10/28![Southwest logo]()
$468
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/191:29 pm -
1 stop5h 55m
Sat 12/51:59 pm -
1 stop7h 45m
Deal found 10/27![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/191:29 pm -
1 stop5h 55m
Sun 11/228:00 am -
1 stop7h 33m
Deal found 10/29![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:29 pm -
1 stop5h 55m
Thu 11/263:45 pm -
1 stop6h 57m
Deal found 10/28![United Airlines logo]()
$450
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:29 pm -
1 stop5h 55m
Wed 11/253:24 pm -
2 stops10h 24m
Deal found 10/28![United Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/225:00 am -
2 stops10h 32m
Wed 11/253:24 pm -
1 stop8h 27m
Deal found 10/28![United Airlines logo]()
$475
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:29 pm -
1 stop5h 55m
Wed 12/29:00 am -
2 stops11h 36m
Deal found 10/28![United Airlines logo]()
$424
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 October 30, 2026.
Search for one-way flight options from Ontario to Louisville. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Wed 1/208:02 am -
3 stops46h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$123
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:26 pm -
1 stop20h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$142
This Delta deal was found by Cheapflights users on 10/27. 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.
Wed 12/97:05 am -
1 stop6h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Delta logo]()
$150
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 11/276:00 am -
1 stop7h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![American Airlines logo]()
$170
This Southwest deal was found by Cheapflights users on 10/30. 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 2/106:15 am -
1 stop8h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Southwest logo]()
$171
This Southwest deal was found by Cheapflights users on 10/30. 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 1/1310:50 am -
2 stops9h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Southwest logo]()
$176
This Southwest deal was found by Cheapflights users on 10/28. 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 1/207:40 am -
1 stop6h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Southwest logo]()
$181
This Southwest deal was found by Cheapflights users on 10/28. 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 1/710:50 am -
2 stops9h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Southwest logo]()
$186
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:09 pm -
1 stop7h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![American Airlines logo]()
$190
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $339 (Delta) |
One-way from | $123 (Kiwi.com) |
Popular in | January |
Cheapest in | February |
Average price | $567 |
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 October 30, 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
Wed 1/27
7:05 am-5:02 pm
1 stop6h 57m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Mon 2/8
8:30 am-8:25 pm
2 stops8h 55m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$176
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Wed 1/20
9:00 am-5:40 pm
1 stop5h 40m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$181
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Fri 1/8
1:07 pm-11:59 pm
1 stop7h 52m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$181
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Wed 1/6
7:05 am-5:02 pm
1 stop6h 57m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$181
Quickest round-trip
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 12/13
6:55 am-3:25 pm
1 stop5h 30m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$196
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Tue 12/15
5:00 am-2:17 pm
1 stop6h 17m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$210
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Wed 11/18
5:00 am-6:32 pm
2 stops10h 32m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$215
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 1/10
1:07 pm-11:59 pm
1 stop7h 52m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$219
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Fri 1/29
5:00 am-4:35 pm
2 stops8h 35m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$236
Showing 1-10 of 20 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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, February is the cheapest month in which you can book a flight from Ontario to Louisville (average of $406). 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 $415 and $561 in December.The cheapest round-trip price found within the last 5 days was $339 on Delta (Dec 1-Dec 3).
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 October 30, 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.
Food
7.0
Comfort
8.0
Overall
7.9
Boarding
8.1
Crew
8.6
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Overall
7.9
Boarding
8.1
Crew
8.6
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Overall
7.9
Boarding
8.1
Crew
8.6
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Overall
7.9
Boarding
8.1
Crew
8.6
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Overall
7.9
Boarding
8.1
Crew
8.6
Entertainment
7.4
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 locationsShepherdsville
Elizabethtown
Jeffersonville
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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 October 30, 2026.
Ontario and Louisville flights
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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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$288 | Average$466 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$303 | Average$426 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$314 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$327 | Average$486 | FlexibilityNo cancel fee | On-time63% |