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$57+ Cheap flights from Kentucky to Ontario (ONT)

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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
Jan 1 — Jan 81
Thu 1/1
Thu 1/8
1 adult, Economy
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Cheap flight deals from Kentucky to Ontario

Cheapest flights from Kentucky to Ontario
Explore the most affordable flight options available from Kentucky to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 2, 2025.

This CheapOair deal was found by Cheapflights users on 11/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:20 pmCVG - ONT
1 stop24h 02mFrontier
Sat 12/276:00 amONT - CVG
1 stop11h 30mFrontier
Deal found 11/30$184
This CheapOair deal was found by Cheapflights users on 12/1. 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.
Sun 12/218:20 pmCVG - ONT
1 stop27h 57mFrontier
Sat 12/276:00 amONT - CVG
1 stop11h 30mFrontier
Deal found 12/1$185
This Mytrip deal was found by Cheapflights users on 11/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/158:20 pmCVG - ONT
1 stop27h 57mFrontier
Thu 12/186:17 pmONT - CVG
1 stop21h 53mFrontier
Deal found 11/29$207
This Frontier deal was found by Cheapflights users on 12/1. 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 12/257:16 pmCVG - ONT
1 stop7h 43mFrontier
Sat 12/276:00 amONT - CVG
1 stop11h 30mFrontier
Deal found 12/1$208
This CheapOair deal was found by Cheapflights users on 11/29. 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.
Sat 12/209:30 pmCVG - ONT
1 stop26h 57mFrontier
Thu 12/256:45 amONT - CVG
1 stop16h 23mFrontier
Deal found 11/29$209
This CheapOair deal was found by Cheapflights users on 12/1. 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 12/117:41 pmBNA - ONT
1 stop20h 44mFrontier
Sat 12/133:20 pmONT - BNA
1 stop24h 30mFrontier
Deal found 12/1$225
This Frontier deal was found by Cheapflights users on 11/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:16 pmCVG - ONT
1 stop7h 43mFrontier
Mon 1/56:00 amONT - CVG
1 stop10h 10mFrontier
Deal found 11/30$228
This CheapOair deal was found by Cheapflights users on 12/2. 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.
Fri 12/126:10 amCVG - ONT
1 stop11h 15mFrontier
Sat 12/133:20 pmONT - CVG
1 stop25h 12mFrontier
Deal found 12/2$229
This Frontier deal was found by Cheapflights users on 11/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/122:23 pmCVG - ONT
1 stop9h 54mFrontier
Mon 12/156:15 amONT - CVG
1 stop9h 55mFrontier
Deal found 11/30$232
This CheapOair deal was found by Cheapflights users on 11/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:45 pmBNA - ONT
1 stop21h 40mFrontier
Fri 12/196:45 amONT - BNA
1 stop9h 22mFrontier
Deal found 11/30$233
This CheapOair deal was found by Cheapflights users on 12/2. 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.
Fri 12/122:23 pmCVG - ONT
1 stop9h 54mFrontier
Sun 12/145:18 pmONT - CVG
1 stop22h 52mFrontier
Deal found 12/2$233
This Frontier deal was found by Cheapflights users on 11/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:02 pmBNA - ONT
1 stop6h 57mFrontier
Mon 12/296:45 amONT - BNA
1 stop9h 22mFrontier
Deal found 11/30$234

Find flight deals from Kentucky to Ontario

Keep the following information in mind while searching for Kentucky to Ontario flight deals. Data was last updated December 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$148
(Frontier)

One-way from

$57
(Trip.com)

Popular in

April

Cheapest in

July

Average price

$475
Provider with most accurate pricing for Louisville Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Los Angeles flights.
Search Deals
From Kentucky to Ontario
Search Deals
One-way flight from Kentucky to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kentucky to Ontario 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 December 2, 2025.
Use the filters below to find and compare flights from Kentucky to Ontario that are best for you.

Fly from

Kentucky

Fly to

Ontario

Route

Depart

Return

Price

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 1/10

8:00 am-3:08 pm

1 stop10h 08m

Ontario

Mon 1/12

6:00 am-7:49 pm

1 stop10h 49m

$236

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 1/6

6:39 pm-12:14 am

1 stop8h 35m

Ontario

Mon 1/12

6:00 am-7:49 pm

1 stop10h 49m

$236

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 1/24

7:15 am-12:16 pm

1 stop7h 01m

Ontario

Mon 2/2

10:30 pm-8:19 am

1 stop7h 49m

$237

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 1/13

2:06 pm-9:05 pm

1 stop8h 59m

Ontario

Fri 1/16

3:30 pm-9:28 pm

1 stop27h 58m

$242

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 1/6

6:45 am-1:56 pm

1 stop10h 11m

Ontario

Wed 1/14

7:30 am-7:04 pm

1 stop8h 34m

$245

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 1/7

6:45 am-1:56 pm

1 stop10h 11m

Ontario

Tue 1/13

7:30 am-7:04 pm

1 stop8h 34m

$245

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Fri 1/9

6:45 am-1:56 pm

1 stop10h 11m

Ontario

Sat 1/10

7:30 am-6:38 pm

1 stop8h 08m

$246

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 1/8

6:45 am-1:56 pm

1 stop10h 11m

Ontario

Sat 1/10

7:30 am-6:38 pm

1 stop8h 08m

$246

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 1/8

6:45 am-1:56 pm

1 stop10h 11m

Ontario

Wed 1/14

7:30 am-7:04 pm

1 stop8h 34m

$246

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 1/7

6:45 am-1:56 pm

1 stop10h 11m

Ontario

Sun 1/11

7:30 am-7:04 pm

1 stop8h 34m

$246

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 60 results
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Best time to book a flight from Kentucky to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Kentucky 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 Kentucky to Ontario

What is the cheapest month to book a flight from Kentucky to Ontario?

Currently, May is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $93). Flying from Kentucky to Ontario in April is currently the most expensive (average of $317). 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 KY to ONT?

Find hourly flight availability from Kentucky to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 2, 2025.

One of the essential ways to save on airfare from Kentucky to Ontario is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 14% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Kentucky to Ontario. 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 into for flights to Ontario from Kentucky?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Kentucky to Ontario.

  • How long is the flight from Kentucky to Ontario?

    Departing from Kentucky to Ontario will take you 7h 01m. Kentucky and Ontario are separated by a distance of 1745 mi. This flight may include one or multiple stops.

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

    While some choose either Nashville Intl - Ontario or Louisville Intl - Ontario, Cincinnati Cinci./N. Kentucky - Ontario is the most popular route from Kentucky to Ontario.

  • Can I find deals for flights from Kentucky to Ontario that include hotel bookings?

    Yes. In addition to deals on Kentucky to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Kentucky to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kentucky to Ontario.

  • Can I find deals for business class flights from Kentucky to Ontario?

    Yes. Cheapflights offers flight deals from Kentucky to Ontario 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 Kentucky to Ontario?

    Currently, May is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $93). Flying from Kentucky to Ontario in April is currently the most expensive (average of $317). 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 Kentucky to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Kentucky to Ontario

Discover the top 4 airlines that operate flights from Kentucky to Ontario. 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 December 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$458FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$392FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$302Average$385FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$344Average$606FlexibilityNo cancel feeOn-time69%

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