$135+ Cheap flights from Ontario (ONT) to Kentucky
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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
Nov 25 — Dec 21
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Kentucky with Cheapflights
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Cheapest flights from Ontario to KentuckyExplore the most affordable flight options available from Ontario to Kentucky. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 26, 2026.
Explore the most affordable flight options available from Ontario to Kentucky. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 26, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:06 pm -
1 stop21h 13m
Mon 12/78:47 am -
1 stop17h 36m
Deal found 10/21![Multiple Airlines logo]()
$264
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:22 pm -
1 stop6h 12m
Wed 11/186:01 am -
1 stop6h 39m
Deal found 10/23![American Airlines logo]()
$279
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:55 pm -
1 stop6h 00m
Wed 11/116:50 am -
1 stop10h 50m
Deal found 10/21![Southwest logo]()
$284
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:09 pm -
1 stop7h 06m
Wed 12/24:35 pm -
1 stop8h 32m
Deal found 10/21![American Airlines logo]()
$333
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.
Tue 11/2412:18 pm -
1 stop7h 55m
Thu 11/261:01 pm -
1 stop9h 48m
Deal found 10/21![Delta logo]()
$339
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.
Wed 11/256:00 am -
2 stops11h 52m
Wed 12/29:00 am -
1 stop6h 34m
Deal found 10/21![United Airlines logo]()
$347
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/210:30 pm -
1 stop7h 17m
Mon 12/75:03 pm -
1 stop8h 04m
Deal found 10/23![American Airlines logo]()
$379
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.
Tue 11/105:00 am -
2 stops8h 57m
Wed 11/117:00 am -
2 stops8h 33m
Deal found 10/21![United Airlines logo]()
$383
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:40 am -
2 stops9h 00m
Mon 12/712:10 pm -
2 stops8h 30m
Deal found 10/21![Southwest logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Thu 11/512:01 pm -
1 stop28h 18m
Mon 11/911:39 am -
2 stops25h 01m
Deal found 10/25![Multiple Airlines logo]()
$397
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.
Tue 11/101:29 pm -
1 stop5h 55m
Sat 11/148:00 am -
1 stop7h 33m
Deal found 10/21![United Airlines logo]()
$399
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.
Tue 12/112:20 pm -
1 stop8h 44m
Sat 12/512:45 pm -
1 stop10h 10m
Deal found 10/22![Delta logo]()
$399
Best flights from Ontario to KentuckyDiscover carefully curated flight deals from Ontario to Kentucky that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
Discover carefully curated flight deals from Ontario to Kentucky that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
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.
Tue 11/101:29 pm -
1 stop5h 55m
Wed 11/119:02 am -
2 stops11h 59m
Deal found 10/21![United Airlines logo]()
$284
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:55 pm -
1 stop6h 00m
Wed 11/116:50 am -
1 stop10h 50m
Deal found 10/21![Southwest logo]()
$284
This Delta deal was found by Cheapflights users on 10/25. 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.
Wed 12/212:20 pm -
1 stop8h 44m
Mon 12/73:34 pm -
1 stop9h 21m
Deal found 10/25![Delta logo]()
$409
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.
Wed 1/67:40 am -
1 stop5h 15m
Sun 1/106:15 am -
1 stop7h 00m
Deal found 10/22![Southwest logo]()
$291
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:29 pm -
1 stop5h 55m
Sat 11/148:00 am -
1 stop7h 33m
Deal found 10/23![United Airlines logo]()
$399
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/176:00 am -
2 stops14h 46m
Sun 12/2011:17 am -
2 stops15h 42m
Deal found 10/23![Alaska Airlines logo]()
$834
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.
Fri 11/201:32 pm -
1 stop5h 52m
Thu 11/268:00 am -
1 stop7h 33m
Deal found 10/21![United Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Sat 2/67:00 am -
1 stop7h 20m
Tue 2/98:20 am -
1 stop7h 20m
Deal found 10/25![United Airlines logo]()
$544
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Thu 12/171:38 pm -
1 stop5h 41m
Sun 12/2010:45 am -
2 stops14h 26m
Deal found 10/25![United Airlines logo]()
$583
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.
Fri 12/181:38 pm -
1 stop5h 41m
Sun 12/205:50 pm -
1 stop7h 41m
Deal found 10/21![United Airlines logo]()
$735
Last-minute flights from Ontario to KentuckyDiscover last-minute flight deals from Ontario to Kentucky. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Kentucky. Data last updated October 26, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Thu 11/512:01 pm -
1 stop28h 18m
Mon 11/911:39 am -
2 stops25h 01m
Deal found 10/25![Multiple Airlines logo]()
$397
This American Airlines deal was found by Cheapflights users on 10/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:59 pm -
1 stop8h 39m
Sun 11/87:54 pm -
1 stop6h 52m
Deal found 10/25![American Airlines logo]()
$494
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.
Tue 11/101:29 pm -
1 stop5h 55m
Wed 11/119:02 am -
2 stops11h 59m
Deal found 10/21![United Airlines logo]()
$284
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.
Tue 11/101:29 pm -
1 stop5h 55m
Sat 11/148:00 am -
1 stop7h 33m
Deal found 10/21![United Airlines logo]()
$399
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:22 pm -
1 stop6h 12m
Wed 11/186:01 am -
1 stop6h 39m
Deal found 10/23![American Airlines logo]()
$279
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:10 pm -
1 stop8h 02m
Thu 11/196:00 am -
1 stop8h 03m
Deal found 10/23![Delta logo]()
$430
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.
Tue 11/2412:18 pm -
1 stop7h 55m
Thu 11/261:01 pm -
1 stop9h 48m
Deal found 10/21![Delta logo]()
$339
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:45 pm -
1 stop6h 59m
Tue 12/15:55 pm -
1 stop8h 25m
Deal found 10/24![American Airlines logo]()
$485
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/241:29 pm -
1 stop6h 07m
Tue 12/11:45 pm -
2 stops10h 26m
Deal found 10/24![United Airlines logo]()
$488
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:09 pm -
1 stop7h 06m
Wed 12/24:35 pm -
1 stop8h 32m
Deal found 10/21![American Airlines logo]()
$333
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.
Wed 11/256:00 am -
2 stops11h 52m
Wed 12/29:00 am -
1 stop6h 34m
Deal found 10/21![United Airlines logo]()
$347
This American Airlines deal was found by Cheapflights users on 10/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:00 am -
1 stop6h 02m
Tue 12/17:00 am -
2 stops11h 35m
Deal found 10/25![American Airlines logo]()
$411
One-way flights from Ontario to KentuckySearch for one-way flight options from Ontario to Kentucky. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
Search for one-way flight options from Ontario to Kentucky. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Wed 12/92:53 pm -
3 stops41h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$135
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2310:30 pm -
1 stop9h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![American Airlines logo]()
$140
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 11/2212:10 pm -
1 stop8h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Southwest logo]()
$152
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.
Tue 1/55:00 am -
2 stops10h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![United Airlines logo]()
$156
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 11/1212:18 pm -
1 stop8h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Delta logo]()
$160
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/52:12 pm -
3 stops51h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Multiple Airlines logo]()
$178
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.
Mon 11/1611:10 pm -
1 stop6h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Delta logo]()
$181
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.
Wed 12/25:00 am -
1 stop6h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![United Airlines logo]()
$200
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/227:45 pm -
2 stops10h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![American Airlines logo]()
$202
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3010:48 pm -
3 stops33h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Multiple Airlines logo]()
$219
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2910:48 pm -
2 stops37h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Multiple Airlines logo]()
$237
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 11/232:01 pm -
3 stops41h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$290
Find flight deals from Ontario to Kentucky
Keep the following information in mind while searching for Ontario to Kentucky flight deals. Data was last updated October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $264 (Kiwi.com) |
One-way from | $135 (Kiwi.com) |
Popular in | February |
Cheapest in | June |
Average price | $437 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Kentucky 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 26, 2026.
Use the filters below to find and compare flights from Ontario to Kentucky that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Mon 11/23
10:37 am-9:10 pm
1 stop7h 33m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$140
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Tue 1/5
5:00 am-2:31 pm
1 stop6h 31m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$140
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sat 1/9
7:00 am-6:29 pm
1 stop8h 29m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$140
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Wed 12/9
12:36 pm-10:59 am
2 stops43h 23m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$141
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Mon 11/16
11:10 pm-9:06 am
1 stop6h 56m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$181
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Wed 12/2
5:00 am-2:17 pm
1 stop6h 17m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$200
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 11/22
12:10 pm-11:45 pm
1 stop8h 35m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$201
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Sun 11/22
7:45 pm-9:28 am
2 stops10h 43m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$224
OntarioLouisville
ONT Ontario - SDF Louisville Intl
ONTSDF
Ontario
Thu 12/24
5:00 am-6:47 pm
2 stops10h 47m
Louisville Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$239
OntarioLexington
ONT Ontario - LEX Lexington Blue Grass
ONTLEX
Ontario
Tue 12/29
10:48 pm-11:20 am
3 stops57h 32m
Lexington Blue Grass
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$261
Showing 1-10 of 28 resultsSorted by cheapest first
Best time to book a flight from Ontario to Kentucky
Have a flexible travel schedule? Discover the best time to fly to Kentucky from Ontario with our price prediction graph.
ONT-SDF
ONT-LEX
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 Kentucky
ONT-USKY
ONT-SDF
ONT-LEX
What is the cheapest month to book a flight from Ontario to Kentucky?
Currently, February is the cheapest month in which you can book a flight from Ontario to Kentucky (average of $435). Flying from Ontario to Kentucky 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 Kentucky?
Airfare is below average for this route at the moment.
Ontario to Kentucky flights typically cost between $395 and $634 in November.The cheapest round-trip price found within the last 5 days was $279 on American Airlines (Nov 11-Nov 18).
Reviews of airlines servicing Kentucky
Get insights into the airlines that provide service to Kentucky. 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 Kentucky. Reviews last updated October 26, 2026.
Read through reviews of airlines operating flights from Ontario to Kentucky, such as Southwest,Delta, andUnited Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Crew
8.6
Entertainment
7.4
Food
7.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Crew
8.6
Entertainment
7.4
Food
7.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Crew
8.6
Entertainment
7.4
Food
7.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Crew
8.6
Entertainment
7.4
Food
7.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Crew
8.6
Entertainment
7.4
Food
7.0
Boarding
8.1
Overall
7.9
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 Kentucky. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Ontario and Kentucky flights
Browse other Ontario and Kentucky flight options. Last updated on October 26, 2026.
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Ontario to Kentucky flights
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Top 4 airlines flying from Ontario to Kentucky
Discover the top 4 airlines that operate flights from Ontario to Kentucky. 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 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$288 | Average$480 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$303 | Average$467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$308 | Average$478 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$327 | Average$486 | FlexibilityNo cancel fee | On-time63% |