$140+ Cheap flights from Louisville to Ontario (SDF - ONT)
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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
Nov 24 — Dec 11
Round-trip
1 adult, Economy
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Find cheap flights from Louisville to Ontario 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 Louisville to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Louisville to OntarioExplore the most affordable flight options available from Louisville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 25, 2026.
Explore the most affordable flight options available from Louisville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 25, 2026.
This American Airlines deal was found by Cheapflights users on 10/19. 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 11/126:10 pm -
1 stop7h 51m
Mon 11/232:09 pm -
1 stop7h 06m
Deal found 10/19![American Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 10/19. 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 11/116:50 am -
1 stop6h 20m
Sun 11/1511:55 pm -
1 stop7h 35m
Deal found 10/19![Southwest logo]()
$291
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/127:00 am -
2 stops11h 33m
Mon 11/235:00 am -
1 stop6h 22m
Deal found 10/19![United Airlines logo]()
$318
This Delta deal was found by Cheapflights users on 10/19. 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 11/93:00 pm -
1 stop9h 57m
Thu 11/267:05 am -
1 stop6h 49m
Deal found 10/19![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 10/22. 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 11/261:01 pm -
1 stop9h 48m
Mon 11/3011:10 pm -
1 stop6h 58m
Deal found 10/22![Delta logo]()
$335
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/1110:37 am -
2 stops10h 24m
Sun 11/155:00 am -
1 stop6h 22m
Deal found 10/19![United Airlines logo]()
$341
This Delta deal was found by Cheapflights users on 10/21. 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 11/95:59 pm -
1 stop6h 58m
Mon 11/1611:10 pm -
1 stop6h 56m
Deal found 10/21![Delta logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Mon 12/2111:39 am -
2 stops23h 22m
Fri 12/258:02 am -
1 stop8h 17m
Deal found 10/23![Multiple Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 10/19. 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 11/135:59 pm -
1 stop6h 58m
Thu 11/2612:18 pm -
1 stop7h 20m
Deal found 10/19![Delta logo]()
$379
This Southwest deal was found by Cheapflights users on 10/19. 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 11/218:30 pm -
1 stop6h 15m
Mon 11/301:00 pm -
1 stop8h 10m
Deal found 10/19![Southwest logo]()
$390
This United Airlines deal was found by Cheapflights users on 10/22. 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 12/243:20 pm -
1 stop8h 40m
Wed 12/305:00 am -
2 stops10h 47m
Deal found 10/22![United Airlines logo]()
$394
Best flights from Louisville to OntarioDiscover carefully curated flight deals from Louisville to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
Discover carefully curated flight deals from Louisville to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
This Southwest deal was found by Cheapflights users on 10/20. 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 1/2811:30 am -
1 stop8h 30m
Thu 2/115:00 am -
1 stop8h 15m
Deal found 10/20![Southwest logo]()
$296
This United Airlines deal was found by Cheapflights users on 10/21. 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 1/288:50 am -
2 stops11h 45m
Thu 2/115:00 am -
1 stop6h 27m
Deal found 10/21![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 10/24. 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 1/123:59 pm -
1 stop8h 45m
Sat 1/161:08 pm -
1 stop7h 51m
Deal found 10/24![Delta logo]()
$361
This Delta deal was found by Cheapflights users on 10/24. 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 1/135:40 am -
1 stop9h 15m
Tue 1/191:09 pm -
1 stop7h 50m
Deal found 10/24![Delta logo]()
$390
This Southwest deal was found by Cheapflights users on 10/23. 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 12/2111:40 am -
1 stop9h 10m
Fri 12/258:40 am -
1 stop5h 30m
Deal found 10/23![Southwest logo]()
$395
This United Airlines deal was found by Cheapflights users on 10/20. 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 2/43:27 pm -
1 stop8h 33m
Tue 2/91:42 pm -
1 stop5h 48m
Deal found 10/20![United Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/103:45 pm -
1 stop8h 55m
Wed 11/115:00 am -
1 stop6h 22m
Deal found 10/20![United Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/21. 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 1/239:00 am -
2 stops11h 35m
Sat 1/305:00 am -
2 stops10h 29m
Deal found 10/21![United Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 10/20. 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 12/113:20 pm -
1 stop8h 51m
Sun 12/135:00 am -
1 stop6h 17m
Deal found 10/20![United Airlines logo]()
$494
Last-minute flights from Louisville to OntarioDiscover last-minute flight deals from Louisville to Ontario. Data last updated October 25, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Ontario. Data last updated October 25, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 10/21. 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 11/95:59 pm -
1 stop6h 58m
Mon 11/1611:10 pm -
1 stop6h 56m
Deal found 10/21![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/103:45 pm -
1 stop8h 55m
Wed 11/115:00 am -
1 stop6h 22m
Deal found 10/20![United Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 10/19. 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 11/116:50 am -
1 stop6h 20m
Sun 11/1511:55 pm -
1 stop7h 35m
Deal found 10/19![Southwest logo]()
$291
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/1110:37 am -
2 stops10h 24m
Sun 11/155:00 am -
1 stop6h 22m
Deal found 10/19![United Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 10/19. 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 11/218:30 pm -
1 stop6h 15m
Mon 11/301:00 pm -
1 stop8h 10m
Deal found 10/19![Southwest logo]()
$390
This Southwest deal was found by Cheapflights users on 10/23. 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 11/225:05 am -
1 stop5h 55m
Mon 11/301:00 pm -
1 stop8h 10m
Deal found 10/23![Southwest logo]()
$425
This Delta deal was found by Cheapflights users on 10/22. 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 11/261:01 pm -
1 stop9h 48m
Tue 12/112:20 pm -
1 stop6h 31m
Deal found 10/22![Delta logo]()
$279
This Delta deal was found by Cheapflights users on 10/22. 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 11/261:01 pm -
1 stop9h 48m
Mon 11/3011:10 pm -
1 stop6h 58m
Deal found 10/22![Delta logo]()
$335
This Southwest deal was found by Cheapflights users on 10/22. 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 11/301:05 pm -
1 stop10h 55m
Thu 12/38:40 am -
1 stop5h 30m
Deal found 10/22![Southwest logo]()
$428
One-way flights from Louisville to OntarioSearch for one-way flight options from Louisville to Ontario. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
Search for one-way flight options from Louisville to Ontario. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
This Delta deal was found by Cheapflights users on 10/20. 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 11/176:00 am -
1 stop8h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Delta logo]()
$140
This Southwest deal was found by Cheapflights users on 10/20. 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 11/1712:10 pm -
2 stops10h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Southwest logo]()
$145
This Delta deal was found by Cheapflights users on 10/24. 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 12/36:00 am -
1 stop8h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Delta logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 10/20. 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.
Mon 11/168:47 am -
1 stop13h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Multiple Airlines logo]()
$186
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/233:24 pm -
1 stop8h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![United Airlines logo]()
$200
This United Airlines deal was found by Cheapflights users on 10/22. 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 1/2510:20 am -
2 stops13h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![United Airlines logo]()
$205
This Delta deal was found by Cheapflights users on 10/22. 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 11/156:00 am -
1 stop8h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Delta logo]()
$220
This Delta deal was found by Cheapflights users on 10/24. 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 12/23:12 pm -
1 stop8h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Delta logo]()
$240
Find flight deals from Louisville to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Ontario (ONT). 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 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $279 (American Airlines) |
One-way from | $140 (Delta) |
Popular in | November |
Cheapest in | March |
Average price | $526 |
Cheapflights Fare Finder
Customize your flight search to find flights from Louisville to Ontario 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 25, 2026.
Use the filters below to find and compare flights from Louisville to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Thu 12/3
6:00 am-11:07 am
1 stop8h 07m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$181
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Sat 12/5
3:12 pm-7:55 pm
1 stop7h 43m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$181
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Fri 12/4
3:12 pm-9:55 pm
1 stop9h 43m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$181
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Mon 1/25
10:20 am-9:00 pm
2 stops13h 40m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$205
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Wed 12/2
9:00 am-5:36 pm
2 stops11h 36m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$246
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Sat 4/10
7:05 am-5:47 pm
2 stops13h 42m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$281
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Thu 1/28
11:30 am-5:00 pm
1 stop8h 30m
Ontario
Thu 2/11
5:00 am-4:15 pm
1 stop8h 15m
$296
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Tue 11/24
3:24 pm-10:48 pm
2 stops10h 24m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$339
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Thu 1/28
8:50 am-5:35 pm
2 stops11h 45m
Ontario
Thu 2/11
5:00 am-2:27 pm
1 stop6h 27m
$349
LouisvilleOntario
SDF Louisville Intl - ONT Ontario
SDFONT
Louisville Intl
Tue 1/12
3:59 pm-9:44 pm
1 stop8h 45m
Ontario
Sat 1/16
1:08 pm-11:59 pm
1 stop7h 51m
$361
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Louisville to Ontario
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 Louisville to Ontario 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 |
- Most accurate provider: When it comes to deals on Louisville-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Louisville-Ontario 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 Louisville-Ontario 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 Louisville to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Louisville with our price prediction graph.
SDF-ONT
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 Louisville to Ontario
What is the cheapest month to book a flight from Louisville to Ontario?
Currently, March is the cheapest month in which you can book a flight from Louisville to Ontario (average of $359). Flying from Louisville to Ontario in November is currently the most expensive (average of $656). 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 Louisville to Ontario?
Airfare is below average for this route at the moment.
Louisville to Ontario flights typically cost between $478 and $768 in November.The cheapest round-trip price found within the last 5 days was $279 on Delta (Nov 26-Dec 1).
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated October 25, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican Airlines from Louisville to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Overall
7.9
Crew
8.6
Food
7.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Overall
7.9
Crew
8.6
Food
7.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Overall
7.9
Crew
8.6
Food
7.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Overall
7.9
Crew
8.6
Food
7.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Louisville to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Ontario flight routes
Other flight options
Other flights from Louisville
Popular flights
Alternative routes for Louisville to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Louisville to Ontario by cabin class
Find flights from Louisville to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 25, 2026.
Louisville and Ontario flights
Browse other Louisville and Ontario flight options. Last updated on October 25, 2026.
Other flights from Louisville
Browse through other flights departing from Louisville. Flights are based on user searches made on Cheapflights and were last updated on October 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Louisville to Ontario
Discover the top 3 airlines that operate flights from Louisville to Ontario. 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 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$324 | Average$538 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$337 | Average$507 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$370 | Average$492 | FlexibilityNo cancel fee | On-time63% |