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Kentucky

$125+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(Trip.com)

One-way from

$125
(Frontier)

Popular in

December

Cheapest in

August

Average price

$516
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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. 23% potential increase in price ($116 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 March 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 March 28, 2025.

This Frontier deal was found by Cheapflights users on 3/27. 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.
Thu 4/33:02 pmONT - CVG
1 stop11h 07mFrontier
Thu 4/107:25 amCVG - ONT
1 stop12h 48mFrontier
Deal found 3/27$258
This Alaska Airlines deal was found by Cheapflights users on 3/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/256:24 pmONT - BNA
1 stop9h 26mAlaska Airlines
Tue 5/67:10 amBNA - ONT
1 stop10h 22mAlaska Airlines
Deal found 3/25$269
This CheapOair deal was found by Cheapflights users on 3/27. 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.
Thu 4/34:15 pmONT - BNA
1 stop18h 54mFrontier
Thu 4/1012:58 pmBNA - ONT
1 stop22h 24mFrontier
Deal found 3/27$270
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 4/175:15 pmONT - BNA
2 stops13h 03mDelta
Mon 4/217:00 pmBNA - ONT
1 stop6h 41mDelta
Deal found 3/25$274
This Hawaiian Airlines deal was found by Cheapflights users on 3/26. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/26:24 pmONT - BNA
1 stop9h 26mHawaiian Airlines
Wed 5/74:26 pmBNA - ONT
1 stop9h 32mHawaiian Airlines
Deal found 3/26$281
This Travelocity deal was found by Cheapflights users on 3/25. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/612:59 amONT - BNA
1 stop10h 10mMultiple Airlines
Sat 4/194:15 pmBNA - ONT
1 stop9h 44mMultiple Airlines
Deal found 3/25$284
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1712:07 pmONT - TYS
1 stop8h 41mDelta
Sun 4/205:30 amTYS - ONT
1 stop8h 27mDelta
Deal found 3/27$289
This Delta deal was found by Cheapflights users on 3/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2310:29 pmONT - LEX
1 stop9h 10mDelta
Tue 1/63:45 pmLEX - ONT
1 stop10h 08mDelta
Deal found 3/26$289
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/162:59 pmONT - TYS
1 stop6h 23mAmerican Airlines
Sat 8/234:10 pmTYS - ONT
2 stops8h 34mAmerican Airlines
Deal found 3/27$294
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/92:34 pmONT - LEX
1 stop7h 12mAmerican Airlines
Tue 7/1510:58 amLEX - ONT
2 stops10h 10mAmerican Airlines
Deal found 3/27$294
This CheapOair deal was found by Cheapflights users on 3/28. 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.
Wed 4/212:59 amONT - TYS
1 stop11h 42mFrontier
Sun 4/64:43 pmTYS - ONT
1 stop19h 39mFrontier
Deal found 3/28$298
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/212:55 pmONT - BNA
2 stops8h 00mAmerican Airlines
Wed 7/1611:46 amBNA - ONT
2 stops8h 22mAmerican Airlines
Deal found 3/27$299

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 March 28, 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

Mon 4/7

2:43 pm-5:09 am

1 stop11h 26m

Cincinnati Cinci./N. Kentucky

Wed 4/9

4:31 pm-11:59 pm

1 stop10h 28m

$258

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 4/25

6:24 pm-5:50 am

1 stop9h 26m

Nashville Intl

Wed 5/7

4:26 pm-11:58 pm

1 stop9h 32m

$269

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Thu 4/17

5:15 pm-8:18 am

2 stops13h 03m

Nashville Intl

Mon 4/21

7:00 pm-11:41 pm

1 stop6h 41m

$274

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Sun 4/6

12:59 am-1:09 pm

1 stop10h 10m

Nashville Intl

Mon 4/14

6:00 pm-11:59 pm

1 stop7h 59m

$278

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 5/2

6:24 pm-5:50 am

1 stop9h 26m

Nashville Intl

Wed 5/7

4:26 pm-11:58 pm

1 stop9h 32m

$281

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Sun 4/6

12:59 am-1:09 pm

1 stop10h 10m

Nashville Intl

Sat 4/19

4:15 pm-11:59 pm

1 stop9h 44m

$284

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Thu 4/17

12:07 pm-11:48 pm

1 stop8h 41m

Knoxville McGhee Tyson

Sun 4/20

5:30 am-10:57 am

1 stop8h 27m

$289

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 8/16

2:59 pm-12:22 am

1 stop6h 23m

Knoxville McGhee Tyson

Sat 8/23

4:10 pm-9:44 pm

2 stops8h 34m

$294

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Wed 7/9

2:34 pm-12:46 am

1 stop7h 12m

Lexington Blue Grass

Tue 7/15

10:58 am-6:08 pm

2 stops10h 10m

$294

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Wed 7/2

12:55 pm-10:55 pm

2 stops8h 00m

Nashville Intl

Wed 7/16

11:46 am-6:08 pm

2 stops8h 22m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 59 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 March 28, 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 March 28, 2025.
To help decide which airline to fly from Ontario to Kentucky, see what other customers have to say about Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,897 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,336 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 Frontier, which is currently one of the cheapest options available, starting at $125. Alaska Airlines flights start at $137 while deals on Delta start at $138 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$248Average$489FlexibilityNo cancel feeOn-time71%
DeltaCheapest$286Average$419FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$354Average$491FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$367Average$479FlexibilityNo cancel feeOn-time63%
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