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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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$248
(CheapOair)

One-way from

$119
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$248
From Ontario to Kentucky
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One-way flight from Ontario to Kentucky
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Highest demand for flights based on searches. 25% potential increase in price ($124 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1012:59 amONT - CVG
1 stop16h 21mFrontier
Sun 9/146:10 amCVG - ONT
1 stop7h 47mFrontier
Deal found 6/9$248
This Gotogate deal was found by Cheapflights users on 6/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1512:59 amONT - BNA
1 stop21h 03mFrontier
Mon 8/187:27 pmBNA - ONT
1 stop6h 23mFrontier
Deal found 6/12$268
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:10 amONT - BNA
1 stop8h 37mAlaska Airlines
Thu 9/115:27 pmBNA - ONT
1 stop8h 26mAlaska Airlines
Deal found 6/10$277
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/66:58 pmONT - CVG
1 stop9h 09mHawaiian Airlines
Tue 8/126:37 pmCVG - ONT
1 stop8h 36mHawaiian Airlines
Deal found 6/10$278
This Delta deal was found by Cheapflights users on 6/12. 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 8/61:15 pmONT - CVG
1 stop6h 48mDelta
Tue 8/1212:20 pmCVG - ONT
2 stops13h 00mDelta
Deal found 6/12$284
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:02 amONT - BNA
1 stop6h 53mUnited Airlines
Sat 10/189:51 amBNA - ONT
2 stops9h 49mUnited Airlines
Deal found 6/10$284
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/144:00 pmONT - CVG
1 stop12h 07mAlaska Airlines
Wed 8/206:37 pmCVG - ONT
1 stop19h 07mAlaska Airlines
Deal found 6/10$288
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.
Thu 10/22:30 pmONT - BNA
1 stop7h 15mAmerican Airlines
Tue 10/73:55 pmBNA - ONT
1 stop8h 05mAmerican Airlines
Deal found 6/10$288
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1611:45 amONT - TYS
1 stop9h 03mDelta
Sat 8/235:45 amTYS - ONT
1 stop7h 50mDelta
Deal found 6/10$289
This Delta deal was found by Cheapflights users on 6/12. 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 7/2510:05 pmONT - LEX
1 stop8h 16mDelta
Wed 7/303:46 pmLEX - ONT
1 stop9h 41mDelta
Deal found 6/12$289
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/197:05 amONT - BNA
1 stop6h 40mDelta
Wed 9/35:00 pmBNA - ONT
1 stop7h 40mDelta
Deal found 6/9$294
This Booking.com deal was found by Cheapflights users on 6/11. 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 8/2012:59 amONT - TYS
1 stop15h 42mFrontier
Mon 8/257:10 pmTYS - ONT
1 stop7h 40mFrontier
Deal found 6/11$296

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 12, 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

Wed 9/10

12:59 am-8:20 pm

1 stop16h 21m

Cincinnati Cinci./N. Kentucky

Sun 9/14

6:10 am-10:57 am

1 stop7h 47m

$248

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 8/15

12:59 am-12:02 am

1 stop21h 03m

Nashville Intl

Mon 8/18

7:27 pm-11:50 pm

1 stop6h 23m

$268

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Tue 9/9

7:10 am-5:47 pm

1 stop8h 37m

Nashville Intl

Thu 9/11

5:27 pm-11:53 pm

1 stop8h 26m

$277

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Wed 8/6

6:58 pm-7:07 am

1 stop9h 09m

Cincinnati Cinci./N. Kentucky

Tue 8/12

6:37 pm-12:13 am

1 stop8h 36m

$278

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Tue 8/26

7:10 am-5:47 pm

1 stop8h 37m

Nashville Intl

Tue 9/9

9:00 am-6:28 pm

1 stop11h 28m

$282

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Tue 7/1

5:08 pm-9:37 am

2 stops13h 29m

Cincinnati Cinci./N. Kentucky

Fri 7/4

5:55 pm-10:14 pm

1 stop7h 19m

$284

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Mon 7/7

12:59 am-10:53 am

1 stop7h 54m

Nashville Intl

Tue 7/15

5:42 pm-10:34 pm

1 stop6h 52m

$288

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Thu 8/14

4:00 pm-7:07 am

1 stop12h 07m

Cincinnati Cinci./N. Kentucky

Wed 8/20

6:37 pm-10:44 am

1 stop19h 07m

$288

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 8/16

11:45 am-11:48 pm

1 stop9h 03m

Knoxville McGhee Tyson

Sat 8/23

5:45 am-10:35 am

1 stop7h 50m

$289

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Fri 7/25

10:05 pm-9:21 am

1 stop8h 16m

Lexington Blue Grass

Tue 7/29

3:46 pm-10:27 pm

1 stop9h 41m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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, January is the cheapest month in which you can book a flight from Ontario to Kentucky (average of $299). Flying from Ontario to Kentucky in April is currently the most expensive (average of $369). 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 June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Kentucky as you normally would.

Rainfall in Kentucky by month

Plan your trip to Kentucky by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Kentucky ranges from 3.1 - 5.3 inches per month. May is typically the wettest month, when rainfall can reach 5.3 in. September is typically the driest time to visit Kentucky when rainfall is around 3.1 in.

Temperature in Kentucky by month

Plan your trip to Kentucky by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Kentucky, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 12, 2025.
To help decide which airline to fly from Ontario to Kentucky, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

    To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at $119. Alaska Airlines flights start at $123 while deals on American Airlines start at $124 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, January is the cheapest month in which you can book a flight from Ontario to Kentucky (average of $299). Flying from Ontario to Kentucky in April is currently the most expensive (average of $369). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$248Average$476FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$396FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$354Average$505FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$367Average$476FlexibilityNo cancel feeOn-time63%

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