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Kentucky

$63+ 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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
nov. 28 — dic. 51
vie. 11/28
vie. 12/5
1 adult, Economy
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Find 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 octubre 29, 2025.

This CheapOair deal was found by Cheapflights users on 10/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/1312:05 pmONT - CVG
1 stop10h 34mFrontier
mar. 11/1810:24 amCVG - ONT
1 stop14h 03mFrontier
Deal found 10/27$130
This Frontier deal was found by Cheapflights users on 10/28. 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.
mié. 11/198:45 amONT - CVG
1 stop10h 23mFrontier
jue. 12/46:10 amCVG - ONT
1 stop7h 59mFrontier
Deal found 10/28$150
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
mié. 12/246:45 amONT - CVG
2 stops25h 07mFrontier
lun. 1/58:20 pmCVG - ONT
1 stop26h 53mFrontier
Deal found 10/27$171
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/58:45 amONT - CVG
1 stop10h 23mFrontier
mié. 11/1210:24 amCVG - ONT
1 stop27h 46mFrontier
Deal found 10/28$176
This Frontier deal was found by Cheapflights users on 10/27. 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.
vie. 11/147:44 pmONT - CVG
1 stop8h 10mFrontier
jue. 11/206:00 amCVG - ONT
1 stop8h 11mFrontier
Deal found 10/27$182
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/1512:05 pmONT - CVG
1 stop8h 54mFrontier
lun. 11/176:05 amCVG - ONT
1 stop8h 05mFrontier
Deal found 10/28$196
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/1312:05 pmONT - BNA
1 stop24h 42mFrontier
lun. 11/173:42 pmBNA - ONT
1 stop10h 08mFrontier
Deal found 10/28$196
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/412:04 pmONT - BNA
1 stop28h 42mFrontier
dom. 12/76:45 pmBNA - ONT
1 stop21h 40mFrontier
Deal found 10/28$202
This Priceline deal was found by Cheapflights users on 10/28. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1912:58 amONT - CVG
1 stop6h 48mFrontier
lun. 11/246:00 amCVG - ONT
1 stop8h 28mFrontier
Deal found 10/28$206
This Frontier deal was found by Cheapflights users on 10/29. 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.
lun. 11/36:53 amONT - BNA
1 stop5h 54mFrontier
sáb. 11/153:42 pmBNA - ONT
1 stop10h 08mFrontier
Deal found 10/29$206
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
mié. 12/246:45 amONT - CVG
2 stops25h 07mFrontier
mié. 12/314:25 pmCVG - ONT
1 stop10h 34mFrontier
Deal found 10/27$210
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
mié. 12/246:45 amONT - CVG
2 stops25h 07mFrontier
dom. 1/48:20 pmCVG - ONT
1 stop23h 55mFrontier
Deal found 10/27$211

Cheap flight deals from Ontario to Kentucky

Keep the following information in mind while searching for Ontario to Kentucky flight deals. Data was last updated octubre 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$130
(Frontier)

One-way from

$63
(Trip.com)

Popular in

December

Cheapest in

July

Average price

$303
Provider with most accurate pricing for Los Angeles-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Louisville Intl flights.
Search Deals
From Ontario to Kentucky
Search Deals
One-way flight from Ontario to Kentucky
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($133 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 octubre 29, 2025.
Use the filters below to find and compare flights from Ontario to Kentucky that are best for you.

Fly from

Ontario

Fly to

Kentucky

Route

Depart

Return

Price

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

sáb. 11/15

12:05 pm-11:59 pm

1 stop8h 54m

Cincinnati Cinci./N. Kentucky

lun. 11/17

6:05 am-11:10 am

1 stop8h 05m

$196

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

mié. 12/24

6:45 am-10:52 am

2 stops25h 07m

Cincinnati Cinci./N. Kentucky

mié. 12/31

4:25 pm-11:59 pm

1 stop10h 34m

$210

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

sáb. 11/8

12:05 pm-11:59 pm

1 stop8h 54m

Cincinnati Cinci./N. Kentucky

dom. 11/9

9:30 pm-7:17 am

1 stop12h 47m

$228

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

mié. 11/12

8:45 am-4:58 pm

2 stops29h 13m

Cincinnati Cinci./N. Kentucky

sáb. 11/15

3:47 pm-11:50 pm

1 stop11h 03m

$236

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

lun. 11/17

6:53 am-1:39 am

1 stop15h 46m

Cincinnati Cinci./N. Kentucky

vie. 11/21

6:30 am-2:26 pm

1 stop10h 56m

$266

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

jue. 12/4

2:59 pm-11:58 pm

1 stop5h 59m

Cincinnati Cinci./N. Kentucky

dom. 12/7

2:23 pm-9:17 pm

1 stop9h 54m

$273

OntarioNashville

ONT - BNA

ONTBNA

Ontario

sáb. 2/14

8:30 am-12:59 am

1 stop14h 29m

Nashville Intl

mié. 2/18

9:47 pm-6:01 pm

2 stops22h 14m

$283

OntarioNashville

ONT - BNA

ONTBNA

Ontario

mar. 1/13

6:00 am-2:04 pm

1 stop6h 04m

Nashville Intl

sáb. 1/17

4:55 pm-9:48 pm

1 stop6h 53m

$285

OntarioNashville

ONT - BNA

ONTBNA

Ontario

vie. 1/9

11:53 am-11:59 pm

1 stop10h 06m

Nashville Intl

mié. 1/14

7:00 am-3:08 pm

1 stop10h 08m

$285

OntarioNashville

ONT - BNA

ONTBNA

Ontario

dom. 11/16

6:00 am-2:18 pm

1 stop6h 18m

Nashville Intl

mar. 11/18

4:42 pm-11:04 pm

1 stop8h 22m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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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, June is the cheapest month in which you can book a flight from Ontario to Kentucky (average of $71). Flying from Ontario to Kentucky in March is currently the most expensive (average of $322). 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.

What is the cheapest time of day to fly from ONT to KY?

Find hourly flight availability from Ontario to Kentucky. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 29, 2025.

It’s optimal to fly from Ontario to Kentucky in the evening. By choosing this option you can save up to 20% on the cost of your flight, compared to a flight in the afternoon.

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 octubre 29, 2025.
Read through reviews of airlines operating flights from Ontario to Kentucky, such as Southwest, Delta, and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
7,992 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,999 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,032 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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?

    Frontier, Delta, and American Airlines can get you from Ontario to Kentucky in just under 6h 04m. Your travel time can differ by up to 2h 50m. 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 Frontier, which is currently one of the cheapest options available, starting at $65. Alaska Airlines flights start at $142 while deals on American Airlines start at $160 one-way.

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

    The most popular flight routes from Ontario to Kentucky are Ontario - Nashville Intl, Ontario - Cincinnati Cinci./N. Kentucky and Ontario - Louisville Intl.

  • 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, June is the cheapest month in which you can book a flight from Ontario to Kentucky (average of $71). Flying from Ontario to Kentucky in March is currently the most expensive (average of $322). 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

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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.
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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 2,558,603 searches. Data last updated octubre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$484FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$440FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$342Average$461FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$343Average$506FlexibilityNo cancel feeOn-time69%

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