$181+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
Jun 11 — Jun 181
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
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 May 12, 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 May 12, 2026.
This Delta deal was found by Cheapflights users on 5/10. 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 7/2110:00 pm
ONT
- SDF
1 stop7h 54m
Delta
Wed 7/296:00 am
SDF
- ONT
1 stop7h 38m
Delta
Deal found 5/10![Delta logo]()
$351
This American Airlines deal was found by Cheapflights users on 5/6. 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 9/912:35 pm
ONT
- SDF
1 stop7h 31m
American Airlines
Mon 9/147:29 pm
SDF
- ONT
1 stop6h 37m
American Airlines
Deal found 5/6![American Airlines logo]()
$353
This American Airlines deal was found by Cheapflights users on 5/6. 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.
Mon 9/2111:59 pm
ONT
- SDF
1 stop7h 48m
American Airlines
Mon 9/287:29 pm
SDF
- ONT
1 stop6h 37m
American Airlines
Deal found 5/6![American Airlines logo]()
$355
This Southwest deal was found by Cheapflights users on 5/10. 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 7/811:55 pm
ONT
- SDF
1 stop7h 10m
Southwest
Wed 7/225:25 pm
SDF
- ONT
2 stops7h 50m
Southwest
Deal found 5/10![Southwest logo]()
$356
This Southwest deal was found by Cheapflights users on 5/8. 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 6/19:55 pm
ONT
- SDF
2 stops8h 55m
Southwest
Thu 6/45:05 pm
SDF
- ONT
1 stop8h 20m
Southwest
Deal found 5/8![Southwest logo]()
$360
This Delta deal was found by Cheapflights users on 5/10. 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 7/85:10 pm
ONT
- SDF
2 stops12h 44m
Delta
Wed 7/225:55 pm
SDF
- ONT
2 stops8h 53m
Delta
Deal found 5/10![Delta logo]()
$361
This Delta deal was found by Cheapflights users on 5/10. 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 7/2110:00 pm
ONT
- SDF
1 stop9h 29m
Delta
Sat 8/17:05 am
SDF
- ONT
1 stop6h 33m
Delta
Deal found 5/10![Delta logo]()
$364
This Delta deal was found by Cheapflights users on 5/10. 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 6/310:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Mon 6/84:40 pm
SDF
- ONT
1 stop8h 08m
Delta
Deal found 5/10![Delta logo]()
$365
This Delta deal was found by Cheapflights users on 5/10. 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 7/2310:00 pm
ONT
- SDF
1 stop9h 29m
Delta
Sat 8/17:05 am
SDF
- ONT
1 stop6h 33m
Delta
Deal found 5/10![Delta logo]()
$377
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 May 12, 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 May 12, 2026.
This Southwest deal was found by Cheapflights users on 5/8. 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 6/111:55 pm
ONT
- SDF
1 stop6h 55m
Southwest
Tue 6/95:35 am
SDF
- ONT
1 stop9h 30m
Southwest
Deal found 5/8![Southwest logo]()
$353
This Delta deal was found by Cheapflights users on 5/8. 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 9/27:00 am
ONT
- SDF
1 stop9h 01m
Delta
Sat 9/57:00 am
SDF
- ONT
1 stop7h 04m
Delta
Deal found 5/8![Delta logo]()
$365
This United Airlines deal was found by Cheapflights users on 5/10. 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 9/15:00 am
ONT
- SDF
1 stop6h 29m
United Airlines
Wed 9/211:00 am
SDF
- ONT
2 stops12h 01m
United Airlines
Deal found 5/10![United Airlines logo]()
$456
This Southwest deal was found by Cheapflights users on 5/8. 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 6/111:55 pm
ONT
- SDF
1 stop6h 55m
Southwest
Thu 6/45:05 pm
SDF
- ONT
1 stop8h 20m
Southwest
Deal found 5/8![Southwest logo]()
$355
This Southwest deal was found by Cheapflights users on 5/7. 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 9/18:35 am
ONT
- SDF
1 stop6h 20m
Southwest
Mon 9/711:05 am
SDF
- ONT
1 stop12h 35m
Southwest
Deal found 5/7![Southwest logo]()
$358
This Delta deal was found by Cheapflights users on 5/9. 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 8/59:43 am
ONT
- SDF
2 stops11h 41m
Delta
Sun 8/92:34 pm
SDF
- ONT
2 stops12h 00m
Delta
Deal found 5/9![Delta logo]()
$435
This Delta deal was found by Cheapflights users on 5/8. 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 9/310:59 pm
ONT
- SDF
1 stop7h 54m
Delta
Sun 9/66:00 am
SDF
- ONT
1 stop8h 04m
Delta
Deal found 5/8![Delta logo]()
$467
This Southwest deal was found by Cheapflights users on 5/10. 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 6/101:20 pm
ONT
- SDF
1 stop7h 55m
Southwest
Wed 6/1710:55 am
SDF
- ONT
1 stop6h 10m
Southwest
Deal found 5/10![Southwest logo]()
$439
This Southwest deal was found by Cheapflights users on 5/9. 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 6/215:15 am
ONT
- SDF
1 stop6h 00m
Southwest
Thu 6/256:05 pm
SDF
- ONT
2 stops9h 00m
Southwest
Deal found 5/9![Southwest logo]()
$492
Last-minute flights from Ontario to LouisvilleDiscover last-minute flight deals from Ontario to Louisville. Data last updated May 12, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Louisville. Data last updated May 12, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 5/9. 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 5/3010:00 pm
ONT
- SDF
1 stop9h 25m
Delta
Sat 6/65:50 pm
SDF
- ONT
1 stop6h 58m
Delta
Deal found 5/9![Delta logo]()
$377
This Southwest deal was found by Cheapflights users on 5/8. 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 6/111:55 pm
ONT
- SDF
1 stop6h 55m
Southwest
Tue 6/95:35 am
SDF
- ONT
1 stop9h 30m
Southwest
Deal found 5/8![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 5/8. 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 6/111:55 pm
ONT
- SDF
1 stop6h 55m
Southwest
Thu 6/45:05 pm
SDF
- ONT
1 stop8h 20m
Southwest
Deal found 5/8![Southwest logo]()
$355
This Delta deal was found by Cheapflights users on 5/10. 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 6/310:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Mon 6/84:40 pm
SDF
- ONT
1 stop8h 08m
Delta
Deal found 5/10![Delta logo]()
$365
This Southwest deal was found by Cheapflights users on 5/7. 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 6/63:00 pm
ONT
- SDF
1 stop7h 20m
Southwest
Sat 6/132:55 pm
SDF
- ONT
1 stop5h 55m
Southwest
Deal found 5/7![Southwest logo]()
$406
This American Airlines deal was found by Cheapflights users on 5/8. 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 6/66:10 am
ONT
- SDF
2 stops9h 50m
American Airlines
Sat 6/131:21 pm
SDF
- ONT
2 stops11h 41m
American Airlines
Deal found 5/8![American Airlines logo]()
$417
This Delta deal was found by Cheapflights users on 5/9. 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 6/1510:00 pm
ONT
- SDF
1 stop7h 57m
Delta
Tue 7/76:00 am
SDF
- ONT
1 stop7h 38m
Delta
Deal found 5/9![Delta logo]()
$425
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 May 12, 2026.
Search for one-way flight options from Ontario to Louisville. Find affordable one-way fares based on user searches. Data last updated May 12, 2026.
This United Airlines deal was found by Cheapflights users on 5/9. 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 6/106:39 pm
ONT
- SDF
2 stops11h 47m
United Airlines
Deal found 5/9![United Airlines logo]()
$181
This Southwest deal was found by Cheapflights users on 5/6. 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 6/48:35 am
ONT
- SDF
1 stop12h 50m
Southwest
Deal found 5/6![Southwest logo]()
$183
This Delta deal was found by Cheapflights users on 5/10. 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 6/227:05 am
ONT
- SDF
1 stop9h 19m
Delta
Deal found 5/10![Delta logo]()
$189
This Delta deal was found by Cheapflights users on 5/7. 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 5/2412:07 pm
ONT
- SDF
1 stop6h 42m
Delta
Deal found 5/7![Delta logo]()
$211
This American Airlines deal was found by Cheapflights users on 5/9. 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 6/102:18 pm
ONT
- SDF
1 stop6h 01m
American Airlines
Deal found 5/9![American Airlines logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/46:00 am
ONT
- SDF
3 stops47h 36m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$228
This Delta deal was found by Cheapflights users on 5/7. 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 6/510:00 pm
ONT
- SDF
1 stop8h 51m
Delta
Deal found 5/7![Delta logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Fri 6/58:03 am
ONT
- SDF
3 stops21h 33m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$255
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 May 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $351 (Delta) |
One-way from | $181 (United Airlines) |
Popular in | January |
Cheapest in | July |
Average price | $477 |
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 2,558,603 searches. Data last updated May 12, 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 - SDF
ONTSDF
Ontario
Mon 6/1
11:55 pm-9:50 am
1 stop6h 55m
Louisville Intl
Tue 6/9
5:35 am-12:05 pm
1 stop9h 30m
$353
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Mon 6/1
11:55 pm-9:50 am
1 stop6h 55m
Louisville Intl
Thu 6/4
5:05 pm-10:25 pm
1 stop8h 20m
$355
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Tue 9/1
8:35 am-5:55 pm
1 stop6h 20m
Louisville Intl
Mon 9/7
11:05 am-8:40 pm
1 stop12h 35m
$358
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Wed 9/2
7:00 am-7:01 pm
1 stop9h 01m
Louisville Intl
Sat 9/5
7:00 am-11:04 am
1 stop7h 04m
$365
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Wed 8/5
9:43 am-12:24 am
2 stops11h 41m
Louisville Intl
Sun 8/9
2:34 pm-11:34 pm
2 stops12h 00m
$435
Quickest round-trip
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Wed 6/10
1:20 pm-12:15 am
1 stop7h 55m
Louisville Intl
Wed 6/17
10:55 am-2:05 pm
1 stop6h 10m
$439
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Tue 9/1
5:00 am-2:29 pm
1 stop6h 29m
Louisville Intl
Wed 9/2
11:00 am-8:01 pm
2 stops12h 01m
$456
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Thu 9/3
10:59 pm-9:53 am
1 stop7h 54m
Louisville Intl
Sun 9/6
6:00 am-11:04 am
1 stop8h 04m
$467
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Sun 6/21
5:15 am-2:15 pm
1 stop6h 00m
Louisville Intl
Thu 6/25
6:05 pm-12:05 am
2 stops9h 00m
$492
Cheapest one-way
OntarioLouisville
ONT - SDF
ONTSDF
Ontario
Thu 6/4
8:35 am-12:25 am
1 stop12h 50m
$183
Showing 1-10 of 18 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 May.
| 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 | |
| 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, July is the cheapest month in which you can book a flight from Ontario to Louisville (average of $416). 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?
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 May 12, 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.
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
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
Corydon
Jeffersonville
Bardstown
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.
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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 May 12, 2026.
Ontario and Louisville flights
Browse other Ontario and Louisville flight options. Last updated on May 12, 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 May 12, 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 2,558,603 searches. Data last updated May 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$238 | Average$546 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$341 | Average$468 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$343 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$387 | Average$487 | FlexibilityNo cancel fee | On-time71% |