$175+ Cheap flights from Louisville to Ontario (SDF - ONT)
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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
may. 26 — jun. 21
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
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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
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Last-minute
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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 abril 26, 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 abril 26, 2026.
This Southwest deal was found by Cheapflights users on 4/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/228:15 am
SDF
- ONT
1 stop7h 25m
Southwest
mié. 9/3010:55 am
ONT
- SDF
1 stop7h 35m
Southwest
Deal found 4/21![Southwest logo]()
$273
This Delta deal was found by Cheapflights users on 4/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/125:45 pm
SDF
- ONT
1 stop7h 11m
Delta
mar. 8/1810:59 pm
ONT
- SDF
1 stop9h 34m
Delta
Deal found 4/23![Delta logo]()
$277
This Delta deal was found by Cheapflights users on 4/22. 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.
sáb. 5/235:47 pm
SDF
- ONT
1 stop7h 01m
Delta
mié. 5/2710:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Deal found 4/22![Delta logo]()
$302
This Delta deal was found by Cheapflights users on 4/21. 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.
sáb. 5/167:05 am
SDF
- ONT
2 stops12h 12m
Delta
mar. 5/2610:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Deal found 4/21![Delta logo]()
$307
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/136:07 am
SDF
- ONT
1 stop7h 02m
American Airlines
sáb. 5/162:08 pm
ONT
- SDF
1 stop6h 03m
American Airlines
Deal found 4/22![American Airlines logo]()
$311
This Delta deal was found by Cheapflights users on 4/22. 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.
sáb. 5/235:47 pm
SDF
- ONT
1 stop7h 01m
Delta
lun. 6/110:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Deal found 4/22![Delta logo]()
$327
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/277:45 pm
SDF
- ONT
1 stop7h 14m
American Airlines
vie. 5/297:00 am
ONT
- SDF
1 stop9h 00m
American Airlines
Deal found 4/22![American Airlines logo]()
$328
This Southwest deal was found by Cheapflights users on 4/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/164:25 pm
SDF
- ONT
1 stop8h 35m
Southwest
mar. 5/2612:40 pm
ONT
- SDF
1 stop6h 50m
Southwest
Deal found 4/21![Southwest logo]()
$330
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 abril 26, 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 abril 26, 2026.
This Delta deal was found by Cheapflights users on 4/21. 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.
sáb. 5/167:05 am
SDF
- ONT
2 stops12h 12m
Delta
mar. 5/2610:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Deal found 4/21![Delta logo]()
$307
This United Airlines deal was found by Cheapflights users on 4/21. 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.
mar. 5/123:37 pm
SDF
- ONT
2 stops10h 22m
United Airlines
mié. 5/135:00 am
ONT
- SDF
1 stop6h 41m
United Airlines
Deal found 4/21![United Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 4/21. 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.
sáb. 7/186:00 am
SDF
- ONT
1 stop7h 38m
Delta
mié. 7/2210:00 pm
ONT
- SDF
1 stop7h 54m
Delta
Deal found 4/21![Delta logo]()
$457
This Delta deal was found by Cheapflights users on 4/21. 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.
dom. 7/197:05 am
SDF
- ONT
1 stop6h 33m
Delta
lun. 7/2710:00 pm
ONT
- SDF
1 stop7h 54m
Delta
Deal found 4/21![Delta logo]()
$457
This Delta deal was found by Cheapflights users on 4/21. 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.
dom. 7/197:05 am
SDF
- ONT
1 stop6h 33m
Delta
mié. 7/2210:00 pm
ONT
- SDF
1 stop7h 54m
Delta
Deal found 4/21![Delta logo]()
$457
This United Airlines deal was found by Cheapflights users on 4/21. 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.
sáb. 5/93:37 pm
SDF
- ONT
1 stop7h 59m
United Airlines
vie. 5/151:40 pm
ONT
- SDF
1 stop5h 51m
United Airlines
Deal found 4/21![United Airlines logo]()
$580
This Delta deal was found by Cheapflights users on 4/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/287:05 am
SDF
- ONT
1 stop6h 35m
Delta
lun. 7/1310:00 pm
ONT
- SDF
2 stops12h 39m
Delta
Deal found 4/23![Delta logo]()
$513
This United Airlines deal was found by Cheapflights users on 4/25. 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.
sáb. 5/303:25 pm
SDF
- ONT
2 stops10h 25m
United Airlines
dom. 5/316:30 am
ONT
- SDF
1 stop7h 19m
United Airlines
Deal found 4/25![United Airlines logo]()
$663
This United Airlines deal was found by Cheapflights users on 4/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/203:25 pm
SDF
- ONT
2 stops10h 12m
United Airlines
vie. 7/311:18 pm
ONT
- SDF
1 stop6h 41m
United Airlines
Deal found 4/24![United Airlines logo]()
$663
Last-minute flights from Louisville to OntarioDiscover last-minute flight deals from Louisville to Ontario. Data last updated abril 26, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Ontario. Data last updated abril 26, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/136:07 am
SDF
- ONT
1 stop7h 02m
American Airlines
sáb. 5/162:08 pm
ONT
- SDF
1 stop6h 03m
American Airlines
Deal found 4/22![American Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 4/22. 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.
sáb. 5/164:25 pm
SDF
- ONT
1 stop8h 35m
Southwest
mar. 5/2612:40 pm
ONT
- SDF
1 stop6h 50m
Southwest
Deal found 4/22![Southwest logo]()
$340
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/1611:16 am
SDF
- ONT
2 stops11h 18m
American Airlines
mar. 5/267:12 pm
ONT
- SDF
2 stops12h 24m
American Airlines
Deal found 4/22![American Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 4/22. 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.
sáb. 5/235:47 pm
SDF
- ONT
1 stop7h 01m
Delta
mié. 5/2710:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Deal found 4/22![Delta logo]()
$302
This Delta deal was found by Cheapflights users on 4/22. 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.
sáb. 5/235:47 pm
SDF
- ONT
1 stop7h 01m
Delta
lun. 6/110:00 pm
ONT
- SDF
1 stop7h 56m
Delta
Deal found 4/22![Delta logo]()
$327
This Delta deal was found by Cheapflights users on 4/22. 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.
sáb. 5/235:47 pm
SDF
- ONT
1 stop7h 01m
Delta
vie. 5/2912:07 pm
ONT
- SDF
1 stop9h 18m
Delta
Deal found 4/22![Delta logo]()
$355
This Delta deal was found by Cheapflights users on 4/22. 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.
mar. 5/263:29 pm
SDF
- ONT
1 stop9h 19m
Delta
mar. 6/210:00 pm
ONT
- SDF
1 stop9h 25m
Delta
Deal found 4/22![Delta logo]()
$358
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/277:45 pm
SDF
- ONT
1 stop7h 14m
American Airlines
vie. 5/297:00 am
ONT
- SDF
1 stop9h 00m
American Airlines
Deal found 4/22![American Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 4/22. 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.
mié. 5/276:00 am
SDF
- ONT
2 stops13h 17m
Delta
vie. 5/295:50 pm
ONT
- SDF
2 stops13h 09m
Delta
Deal found 4/22![Delta logo]()
$341
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 abril 26, 2026.
Search for one-way flight options from Louisville to Ontario. Find affordable one-way fares based on user searches. Data last updated abril 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/1710:33 am
SDF
- ONT
2 stops48h 02m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$175
This Delta deal was found by Cheapflights users on 4/25. 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.
sáb. 5/235:47 pm
SDF
- ONT
1 stop7h 01m
Delta
Deal found 4/25![Delta logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 4/23. 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.
jue. 5/710:33 am
SDF
- ONT
3 stops26h 32m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 4/23. 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.
vie. 5/810:33 am
SDF
- ONT
3 stops50h 32m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$199
This United Airlines deal was found by Cheapflights users on 4/22. 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.
mar. 6/233:25 pm
SDF
- ONT
1 stop8h 17m
United Airlines
Deal found 4/22![United Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/117:48 pm
SDF
- ONT
2 stops50h 23m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$212
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/2312:00 pm
SDF
- ONT
2 stops9h 22m
American Airlines
Deal found 4/22![American Airlines logo]()
$216
This United Airlines deal was found by Cheapflights users on 4/25. 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.
mar. 5/193:37 pm
SDF
- ONT
1 stop7h 59m
United Airlines
Deal found 4/25![United Airlines logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
sáb. 5/238:06 pm
SDF
- ONT
3 stops40h 59m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$223
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 abril 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $273 (Southwest) |
One-way from | $175 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $468 |
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 2,558,603 searches. Data last updated abril 26, 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 - ONT
SDFONT
Louisville Intl
sáb. 5/16
7:05 am-4:17 pm
2 stops12h 12m
Ontario
mar. 5/26
10:00 pm-8:56 am
1 stop7h 56m
$307
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
mar. 5/12
3:37 pm-10:59 pm
2 stops10h 22m
Ontario
mié. 5/13
5:00 am-2:41 pm
1 stop6h 41m
$424
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
sáb. 7/18
6:00 am-10:38 am
1 stop7h 38m
Ontario
mié. 7/22
10:00 pm-8:54 am
1 stop7h 54m
$457
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
dom. 7/19
7:05 am-10:38 am
1 stop6h 33m
Ontario
lun. 7/27
10:00 pm-8:54 am
1 stop7h 54m
$457
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
dom. 7/19
7:05 am-10:38 am
1 stop6h 33m
Ontario
mié. 7/22
10:00 pm-8:54 am
1 stop7h 54m
$457
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
dom. 6/28
7:05 am-10:40 am
1 stop6h 35m
Ontario
lun. 7/13
10:00 pm-1:39 pm
2 stops12h 39m
$513
Quickest round-trip
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
sáb. 5/9
3:37 pm-8:36 pm
1 stop7h 59m
Ontario
vie. 5/15
1:40 pm-10:31 pm
1 stop5h 51m
$580
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
sáb. 5/30
3:25 pm-10:50 pm
2 stops10h 25m
Ontario
dom. 5/31
6:30 am-4:49 pm
1 stop7h 19m
$663
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
lun. 7/20
3:25 pm-10:37 pm
2 stops10h 12m
Ontario
vie. 7/31
1:18 pm-10:59 pm
1 stop6h 41m
$663
Cheapest one-way
LouisvilleOntario
SDF - ONT
SDFONT
Louisville Intl
sáb. 5/23
5:47 pm-9:48 pm
1 stop7h 01m
$178
Showing 1-10 of 19 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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 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, October is the cheapest month in which you can book a flight from Louisville to Ontario (average of $324). Flying from Louisville to Ontario in December is currently the most expensive (average of $607). 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?
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 abril 26, 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.
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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 abril 26, 2026.
Louisville and Ontario flights
Browse other Louisville and Ontario flight options. Last updated on abril 26, 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 abril 26, 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 2,558,603 searches. Data last updated abril 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$268 | Average$421 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$302 | Average$403 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$337 | Average$607 | FlexibilityNo cancel fee | On-time69% |