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$105+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
Jun 11 — Jun 181
Thu 6/11
Thu 6/18
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 May 12, 2026.

This Frontier deal was found by Cheapflights users on 5/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:42 pm
BNA
-
ONT
1 stop6h 13m
Frontier
Wed 9/166:00 am
ONT
-
BNA
1 stop10h 47m
Frontier
Deal found 5/11$210
This Expedia deal was found by Cheapflights users on 5/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:00 pm
CVG
-
ONT
1 stop25h 53m
Frontier
Tue 8/43:40 pm
ONT
-
CVG
1 stop25h 08m
Frontier
Deal found 5/12$210
This Mytrip deal was found by Cheapflights users on 5/7. 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.
Wed 8/129:00 pm
CVG
-
ONT
1 stop25h 53m
Frontier
Tue 8/181:27 pm
ONT
-
CVG
1 stop27h 08m
Frontier
Deal found 5/7$219
This Gotogate deal was found by Cheapflights users on 5/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:09 pm
BNA
-
ONT
1 stop23h 56m
Frontier
Wed 6/171:33 pm
ONT
-
BNA
1 stop26h 07m
Frontier
Deal found 5/10$230
This Expedia deal was found by Cheapflights users on 5/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/109:00 pm
CVG
-
ONT
1 stop25h 53m
Frontier
Tue 7/141:28 pm
ONT
-
CVG
1 stop27h 20m
Frontier
Deal found 5/11$230
This Frontier deal was found by Cheapflights users on 5/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:36 pm
CVG
-
ONT
1 stop16h 29m
Frontier
Wed 6/171:33 pm
ONT
-
CVG
1 stop27h 14m
Frontier
Deal found 5/12$231
This Mytrip deal was found by Cheapflights users on 5/7. 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.
Wed 8/129:00 pm
CVG
-
ONT
1 stop21h 07m
Frontier
Mon 8/1711:43 am
ONT
-
CVG
1 stop28h 52m
Frontier
Deal found 5/7$233
This Mytrip deal was found by Cheapflights users on 5/8. 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.
Sat 7/1112:09 pm
BNA
-
ONT
1 stop13h 41m
Frontier
Wed 7/153:40 pm
ONT
-
BNA
1 stop24h 00m
Frontier
Deal found 5/8$234
This CheapOair deal was found by Cheapflights users on 5/8. 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.
Tue 8/49:00 pm
CVG
-
ONT
1 stop25h 53m
Frontier
Mon 8/103:40 pm
ONT
-
CVG
1 stop25h 08m
Frontier
Deal found 5/8$234
This Mytrip deal was found by Cheapflights users on 5/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:40 pm
CVG
-
ONT
1 stop21h 29m
Frontier
Wed 9/26:00 am
ONT
-
CVG
1 stop10h 31m
Frontier
Deal found 5/10$236
This Booking.com deal was found by Cheapflights users on 5/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:17 pm
BNA
-
ONT
1 stop6h 32m
Frontier
Wed 6/103:34 pm
ONT
-
BNA
1 stop24h 06m
Frontier
Deal found 5/10$237
This Mytrip deal was found by Cheapflights users on 5/7. 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.
Sat 7/48:15 pm
CVG
-
ONT
1 stop6h 34m
Frontier
Wed 7/83:40 pm
ONT
-
CVG
1 stop25h 08m
Frontier
Deal found 5/7$237

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 May 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$210
(Frontier)

One-way from

$105
(Frontier)

Popular in

December

Cheapest in

July

Average price

$316
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. 17% potential increase in price ($70 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 May 2026
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 May 12, 2026.
Use the filters below to find and compare flights from Kentucky to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 6/4

7:27 pm-11:34 pm

1 stop6h 07m

Ontario

Fri 6/12

10:00 pm-8:43 am

1 stop8h 43m

$321

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 11/5

7:16 pm-11:48 pm

1 stop6h 32m

Ontario

Mon 11/23

10:59 pm-8:36 am

1 stop7h 37m

$321
Quickest round-trip

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Wed 7/8

7:34 pm-11:48 pm

1 stop6h 14m

Ontario

Sat 7/11

12:00 pm-8:43 pm

1 stop6h 43m

$321

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 6/5

7:27 pm-11:34 pm

1 stop6h 07m

Ontario

Fri 6/12

10:00 pm-8:43 am

1 stop8h 43m

$321

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 6/6

7:34 am-12:19 pm

1 stop6h 45m

Ontario

Wed 6/10

1:00 pm-11:07 pm

1 stop8h 07m

$321

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 8/21

10:40 am-8:01 pm

2 stops11h 21m

Ontario

Fri 8/28

7:00 am-3:57 pm

1 stop6h 57m

$326

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Tue 8/11

7:00 am-10:42 am

1 stop6h 42m

Ontario

Mon 8/17

10:00 pm-9:24 am

1 stop8h 24m

$345

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Sat 11/7

1:30 pm-6:18 pm

1 stop7h 48m

Ontario

Mon 11/23

10:59 pm-9:26 am

1 stop7h 27m

$345

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 10/3

5:10 pm-11:44 pm

1 stop8h 34m

Ontario

Sat 10/10

11:55 am-11:58 pm

1 stop10h 03m

$350

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sat 9/19

1:48 pm-6:19 pm

1 stop7h 31m

Ontario

Tue 9/22

7:13 pm-10:08 am

2 stops11h 55m

$364

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/12

Showing 1-10 of 60 resultsSorted by cheapest first
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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, July is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $204). Flying from Kentucky to Ontario in January is currently the most expensive (average of $416). 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.

How much does it cost to fly round-trip from Kentucky to Ontario?

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 6h 07m. Kentucky and Ontario are separated by a distance of 1745 mi. This flight may include one or multiple stops.

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

    $148 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $160 and $162, respectively.

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

    While some choose either Cincinnati Cinci./N. Kentucky - Ontario or Knoxville McGhee Tyson - Ontario, Nashville Intl - 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, July is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $204). Flying from Kentucky to Ontario in January is currently the most expensive (average of $416). 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 May 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$467FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$344FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$302Average$436FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$337Average$607FlexibilityNo cancel feeOn-time69%

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