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Kentucky

$91+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SDF
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$219
(Flightnetwork)

One-way from

$91
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$269
Provider with most accurate pricing for Los Angeles-Louisville Intl flight deals.
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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. 24% potential increase in price ($120 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 May 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 May 1, 2025.

This CheapOair deal was found by Cheapflights users on 4/28. 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 5/285:21 pmONT - CVG
1 stop28h 34mFrontier
Sun 6/13:46 pmCVG - ONT
1 stop23h 34mFrontier
Deal found 4/28$211
This Delta deal was found by Cheapflights users on 4/30. 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.
Wed 5/2112:18 pmONT - LEX
1 stop8h 33mDelta
Wed 5/287:05 amLEX - ONT
1 stop7h 03mDelta
Deal found 4/30$283
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/227:22 pmONT - BNA
1 stop8h 18mHawaiian Airlines
Tue 8/269:00 amBNA - ONT
1 stop11h 28mHawaiian Airlines
Deal found 4/29$288
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/114:45 pmONT - BNA
1 stop10h 55mAlaska Airlines
Fri 9/195:27 pmBNA - ONT
1 stop8h 26mAlaska Airlines
Deal found 4/29$289
This Delta deal was found by Cheapflights users on 4/30. 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.
Tue 7/1510:05 pmONT - TYS
1 stop8h 42mDelta
Sat 7/267:05 amTYS - ONT
1 stop6h 25mDelta
Deal found 4/30$289
This Delta deal was found by Cheapflights users on 4/28. 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.
Mon 6/1610:05 pmONT - BNA
1 stop7h 34mDelta
Wed 6/256:15 amBNA - ONT
1 stop6h 42mDelta
Deal found 4/28$290
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:58 pmONT - BNA
1 stop16h 54mMultiple Airlines
Sun 5/185:25 amBNA - ONT
1 stop10h 13mMultiple Airlines
Deal found 4/29$292
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:00 amONT - BNA
1 stop6h 04mUnited Airlines
Tue 6/106:04 amBNA - ONT
2 stops8h 27mUnited Airlines
Deal found 4/28$294
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/286:15 amONT - TYS
2 stops9h 59mAmerican Airlines
Wed 6/44:10 pmTYS - ONT
2 stops8h 47mAmerican Airlines
Deal found 4/30$299
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/812:59 amONT - BNA
1 stop15h 53mFrontier
Sun 5/117:52 pmBNA - ONT
1 stop17h 23mFrontier
Deal found 4/29$300
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:00 amONT - CVG
1 stop8h 40mAlaska Airlines
Wed 6/116:40 pmCVG - ONT
1 stop8h 19mAlaska Airlines
Deal found 4/29$312
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/2111:59 pmONT - CVG
1 stop7h 53mAmerican Airlines
Sun 5/257:30 amCVG - ONT
1 stop7h 20mAmerican Airlines
Deal found 4/30$313

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 May 1, 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

Sun 6/1

5:22 pm-12:55 am

1 stop28h 33m

Cincinnati Cinci./N. Kentucky

Sun 6/8

3:46 pm-12:20 pm

1 stop23h 34m

$219

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 5/21

12:08 am-4:35 pm

1 stop13h 27m

Knoxville McGhee Tyson

Sun 5/25

5:30 pm-11:51 pm

1 stop9h 21m

$268

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sun 6/29

10:05 pm-9:43 am

1 stop8h 38m

Knoxville McGhee Tyson

Fri 7/4

5:45 am-10:20 am

1 stop7h 35m

$283

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Wed 5/21

12:18 pm-11:51 pm

1 stop8h 33m

Lexington Blue Grass

Wed 5/28

7:05 am-11:08 am

1 stop7h 03m

$283

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 8/22

7:22 pm-5:40 am

1 stop8h 18m

Nashville Intl

Tue 8/26

9:00 am-6:28 pm

1 stop11h 28m

$288

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Wed 6/11

4:45 pm-5:40 am

1 stop10h 55m

Nashville Intl

Fri 9/19

5:27 pm-11:53 pm

1 stop8h 26m

$289

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Mon 6/16

10:05 pm-7:39 am

1 stop7h 34m

Nashville Intl

Wed 6/25

6:15 am-10:57 am

1 stop6h 42m

$290

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Wed 5/14

11:58 pm-6:52 pm

1 stop16h 54m

Nashville Intl

Sun 5/18

5:25 am-1:38 pm

1 stop10h 13m

$292

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 5/28

6:15 am-7:14 pm

2 stops9h 59m

Knoxville McGhee Tyson

Wed 6/4

4:10 pm-9:57 pm

2 stops8h 47m

$299

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Wed 6/11

5:21 pm-6:38 pm

1 stop23h 17m

Nashville Intl

Wed 6/18

7:00 am-9:01 am

1 stop28h 01m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 57 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 May 1, 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 May 1, 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
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

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
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

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
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

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
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

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
2,408 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

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 Frontier, which is currently one of the cheapest options available, starting at $105. Alaska Airlines flights start at $128 while deals on Delta start at $139 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$248Average$481FlexibilityNo cancel feeOn-time71%
DeltaCheapest$286Average$395FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$354Average$505FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$367Average$478FlexibilityNo cancel feeOn-time63%

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