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Kentucky

$115+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$239
(CheapOair)

One-way from

$115
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$252
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. 26% potential increase in price ($130 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 30, 2025.

This Frontier deal was found by Cheapflights users on 7/28. 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.
vie. 11/712:59 amONT - BNA
1 stop12h 44mFrontier
sáb. 11/154:43 pmBNA - ONT
1 stop9h 07mFrontier
Deal found 7/28$238
This CheapOair deal was found by Cheapflights users on 7/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/178:59 pmONT - CVG
1 stop25h 41mFrontier
mar. 9/238:00 amCVG - ONT
1 stop14h 54mFrontier
Deal found 7/29$239
This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/138:59 pmONT - TYS
1 stop16h 19mFrontier
lun. 9/158:35 pmTYS - ONT
1 stop26h 19mFrontier
Deal found 7/28$255
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/3111:39 amONT - BNA
1 stop10h 29mHawaiian Airlines
jue. 9/45:27 pmBNA - ONT
1 stop8h 27mHawaiian Airlines
Deal found 7/28$264
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/51:15 pmONT - BNA
1 stop6h 45mDelta
vie. 11/147:16 pmBNA - ONT
1 stop6h 30mDelta
Deal found 7/28$265
This American Airlines deal was found by Cheapflights users on 7/30. 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.
mar. 9/910:53 amONT - BNA
2 stops9h 46mAmerican Airlines
sáb. 9/133:48 pmBNA - ONT
1 stop7h 36mAmerican Airlines
Deal found 7/30$270
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/222:57 pmONT - TYS
1 stop6h 22mAmerican Airlines
lun. 8/256:39 pmTYS - ONT
1 stop7h 09mAmerican Airlines
Deal found 7/29$289
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1910:47 amONT - LEX
1 stop8h 09mAmerican Airlines
dom. 11/237:03 pmLEX - ONT
1 stop7h 54mAmerican Airlines
Deal found 7/29$289
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2711:39 amONT - BNA
1 stop10h 29mAlaska Airlines
dom. 8/315:27 pmBNA - ONT
1 stop8h 26mAlaska Airlines
Deal found 7/28$291
This United Airlines deal was found by Cheapflights users on 7/30. 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.
vie. 9/51:15 pmONT - TYS
1 stop6h 15mUnited Airlines
lun. 9/84:40 pmTYS - ONT
1 stop7h 03mUnited Airlines
Deal found 7/30$305
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/1611:45 amONT - TYS
1 stop9h 03mDelta
lun. 8/186:14 pmTYS - ONT
1 stop7h 06mDelta
Deal found 7/28$314
This Delta deal was found by Cheapflights users on 7/30. 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.
mié. 8/1310:00 pmONT - LEX
1 stop8h 25mDelta
mié. 8/205:54 pmLEX - ONT
1 stop7h 26mDelta
Deal found 7/30$314

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 julio 30, 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

mié. 9/17

8:59 pm-1:40 am

1 stop25h 41m

Cincinnati Cinci./N. Kentucky

mar. 9/23

8:00 am-7:54 pm

1 stop14h 54m

$239

OntarioNashville

ONT - BNA

ONTBNA

Ontario

mar. 8/5

12:59 am-12:02 am

1 stop21h 03m

Nashville Intl

mar. 8/12

7:00 am-9:09 am

1 stop28h 09m

$239

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

sáb. 9/13

8:59 pm-4:18 pm

1 stop16h 19m

Knoxville McGhee Tyson

lun. 9/15

8:35 pm-7:54 pm

1 stop26h 19m

$255

OntarioNashville

ONT - BNA

ONTBNA

Ontario

dom. 8/31

7:22 pm-5:40 am

1 stop8h 18m

Nashville Intl

jue. 9/4

5:27 pm-11:54 pm

1 stop8h 27m

$264

OntarioNashville

ONT - BNA

ONTBNA

Ontario

mar. 9/2

11:45 am-10:53 pm

1 stop9h 08m

Nashville Intl

sáb. 9/13

12:58 pm-7:15 pm

1 stop8h 17m

$265

OntarioNashville

ONT - BNA

ONTBNA

Ontario

mar. 9/9

10:53 am-10:39 pm

2 stops9h 46m

Nashville Intl

sáb. 9/13

3:48 pm-9:24 pm

1 stop7h 36m

$270

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

vie. 8/22

12:47 pm-12:19 am

1 stop8h 32m

Knoxville McGhee Tyson

lun. 8/25

5:30 am-9:58 am

1 stop7h 28m

$289

OntarioLexington

ONT - LEX

ONTLEX

Ontario

lun. 8/18

11:59 pm-11:03 am

1 stop8h 04m

Lexington Blue Grass

lun. 8/25

6:32 pm-10:48 pm

1 stop7h 16m

$289

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

vie. 9/5

1:15 pm-10:30 pm

1 stop6h 15m

Knoxville McGhee Tyson

lun. 9/8

4:40 pm-8:43 pm

1 stop7h 03m

$305

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

sáb. 8/16

11:45 am-11:48 pm

1 stop9h 03m

Knoxville McGhee Tyson

sáb. 8/23

5:45 am-10:35 am

1 stop7h 50m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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 julio 30, 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.

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 julio 30, 2025.
Read through reviews of airlines operating flights from Ontario to Kentucky, such as Alaska Airlines, Southwest, and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

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

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

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
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

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
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

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
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

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 Frontier, which is currently one of the cheapest options available, starting at $115. Alaska Airlines flights start at $122 while deals on Delta start at $133 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 - Knoxville McGhee Tyson.

  • 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$248Average$475FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$420FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$342Average$462FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$378Average$700FlexibilityNo cancel feeOn-time69%

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