Kentucky

$119+ Cheap flights from Ontario (ONT) to Kentucky

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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
Jul 10 — Jul 171
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Cheap flight deals from Ontario to Kentucky

Cheapest flights from Ontario to Kentucky
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 June 10, 2026.

This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:37 pm
ONT
-
TYS
1 stop7h 45m
American Airlines
Wed 9/166:00 am
TYS
-
ONT
1 stop6h 29m
American Airlines
Deal found 6/10$233
This United Airlines deal was found by Cheapflights users on 6/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:53 pm
ONT
-
TYS
2 stops12h 06m
United Airlines
Tue 11/174:25 pm
TYS
-
ONT
1 stop6h 55m
United Airlines
Deal found 6/8$238
This Expedia deal was found by Cheapflights users on 6/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/64:34 pm
ONT
-
CVG
1 stop24h 51m
Frontier
Thu 8/139:30 pm
CVG
-
ONT
1 stop21h 24m
Frontier
Deal found 6/9$258
This Booking.com deal was found by Cheapflights users on 6/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/51:38 pm
ONT
-
CVG
1 stop27h 47m
Frontier
Tue 8/118:34 pm
CVG
-
ONT
1 stop6h 16m
Frontier
Deal found 6/9$261
This United Airlines deal was found by Cheapflights users on 6/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:53 pm
ONT
-
TYS
2 stops12h 06m
United Airlines
Tue 11/175:20 pm
TYS
-
ONT
1 stop7h 01m
United Airlines
Deal found 6/8$261
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:27 pm
ONT
-
CVG
1 stop27h 08m
Frontier
Tue 9/18:40 pm
CVG
-
ONT
1 stop21h 29m
Frontier
Deal found 6/10$270
This Frontier deal was found by Cheapflights users on 6/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/78:17 am
ONT
-
CVG
1 stop7h 05m
Frontier
Sat 8/88:26 pm
CVG
-
ONT
1 stop6h 24m
Frontier
Deal found 6/9$271
This Frontier deal was found by Cheapflights users on 6/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am
ONT
-
CVG
1 stop10h 31m
Frontier
Wed 9/28:36 pm
CVG
-
ONT
1 stop6h 13m
Frontier
Deal found 6/9$274
This Delta deal was found by Cheapflights users on 6/8. 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.
Mon 11/910:59 pm
ONT
-
TYS
1 stop7h 13m
Delta
Tue 11/175:57 pm
TYS
-
ONT
1 stop7h 17m
Delta
Deal found 6/8$278
This American Airlines deal was found by Cheapflights users on 6/9. 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.
Thu 9/1012:37 pm
ONT
-
TYS
1 stop7h 45m
American Airlines
Sat 9/126:00 am
TYS
-
ONT
1 stop6h 29m
American Airlines
Deal found 6/9$279
This United Airlines deal was found by Cheapflights users on 6/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:53 pm
ONT
-
TYS
2 stops12h 06m
United Airlines
Wed 11/184:25 pm
TYS
-
ONT
1 stop6h 55m
United Airlines
Deal found 6/8$283
This Expedia deal was found by Cheapflights users on 6/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/78:17 am
ONT
-
CVG
1 stop7h 05m
Frontier
Fri 8/149:30 pm
CVG
-
ONT
1 stop13h 33m
Frontier
Deal found 6/8$284

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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$233
(United Airlines)

One-way from

$119
(American Airlines)

Popular in

February

Cheapest in

July

Average price

$265
Provider with most accurate pricing for Los Angeles-Louisville Intl flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Louisville Intl flights.
From Ontario to Kentucky
One-way flight from Ontario to Kentucky
Highest demand for flights based on searches. 15% potential increase in price ($71 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in June 2026

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 2,558,603 searches. Data last updated June 10, 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

Price

Cheapest round-trip

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 8/14

1:06 pm-10:50 pm

1 stop7h 44m

Nashville Intl

Sun 8/16

7:30 am-12:16 pm

1 stop6h 46m

$331

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 7/17

10:00 pm-8:41 am

1 stop8h 41m

Nashville Intl

Fri 7/24

7:34 pm-11:48 pm

1 stop6h 14m

$331

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Thu 10/1

9:45 am-6:08 pm

1 stop6h 23m

Nashville Intl

Sun 10/4

3:44 pm-10:26 pm

1 stop8h 42m

$331

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Thu 10/29

10:59 pm-9:26 am

1 stop7h 27m

Lexington Blue Grass

Tue 11/3

5:55 pm-10:14 pm

1 stop7h 19m

$345

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Thu 7/2

3:34 pm-7:47 pm

1 stop25h 13m

Cincinnati Cinci./N. Kentucky

Mon 7/6

9:30 pm-3:14 pm

1 stop20h 44m

$351

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Thu 10/29

10:59 pm-9:26 am

1 stop7h 27m

Lexington Blue Grass

Fri 11/6

5:55 pm-10:14 pm

1 stop7h 19m

$359

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 6/26

6:00 am-1:44 pm

1 stop5h 44m

Nashville Intl

Tue 6/30

5:10 am-10:40 am

1 stop7h 30m

$360
Quickest round-trip

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Sat 8/29

2:55 pm-10:30 pm

1 stop5h 35m

Nashville Intl

Sun 9/6

11:00 am-1:05 pm

Nonstop4h 05m

$370

OntarioBlountville

ONT - TRI

ONTTRI

Ontario

Sat 9/26

7:05 am-4:20 pm

1 stop6h 15m

Blountville Tri Cities TN/VA

Wed 9/30

6:00 am-10:47 am

1 stop7h 47m

$379

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Thu 8/6

5:00 am-2:27 pm

1 stop6h 27m

Cincinnati Cinci./N. Kentucky

Thu 8/13

12:29 pm-8:01 pm

2 stops10h 32m

$382

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 60 resultsSorted by cheapest first
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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.
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

What is the cheapest month to book a flight from Ontario to Kentucky?

Currently, July is the cheapest month in which you can book a flight from Ontario to Kentucky (average of $120). Flying from Ontario to Kentucky in June is currently the most expensive (average of $382). 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?

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 June 10, 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.

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

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.
  • What airport do you fly from for flights from Ontario to Kentucky?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Kentucky. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Kentucky?

    Delta, Frontier, and Southwest can get you from Ontario to Kentucky in just under 5h 35m. Your travel time can differ by up to 19h 38m. There are 1745 mi between Ontario and Kentucky. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ontario to Kentucky one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $143. American Airlines flights start at $158 while deals on Southwest start at $160 one-way.

  • What are the most popular routes from Ontario to Kentucky?

  • Can I find deals for flights from Ontario to Kentucky that include hotel bookings?

    Yes. In addition to deals on Ontario to Kentucky flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Kentucky?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Kentucky.

  • Can I find deals for business class flights from Ontario to Kentucky?

    Yes. Cheapflights offers flight deals from Ontario to Kentucky by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Kentucky?

    Currently, July is the cheapest month in which you can book a flight from Ontario to Kentucky (average of $120). Flying from Ontario to Kentucky in June is currently the most expensive (average of $382). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Kentucky

See prices for flight routes from nearby airports that may be better suited for you.

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 2,558,603 searches. Data last updated June 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$228Average$429FlexibilityNo cancel feeOn-time69%
DeltaCheapest$238Average$458FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$288Average$452FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$341Average$468FlexibilityNo cancel feeOn-time63%

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