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$80+ 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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
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 March 21, 2026.

This Frontier deal was found by Cheapflights users on 3/20. 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.
Mon 5/49:29 pm
CVG
-
ONT
1 stop15h 36m
Frontier
Mon 5/116:00 am
ONT
-
CVG
1 stop27h 00m
Frontier
Deal found 3/20$161
This Booking.com deal was found by Cheapflights users on 3/20. 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.
Mon 4/208:38 pm
CVG
-
ONT
1 stop25h 11m
Frontier
Thu 4/235:33 pm
ONT
-
CVG
1 stop22h 39m
Frontier
Deal found 3/20$162
This CheapOair deal was found by Cheapflights users on 3/20. 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 5/158:20 pm
BNA
-
ONT
1 stop15h 45m
Frontier
Tue 5/196:00 am
ONT
-
BNA
1 stop10h 22m
Frontier
Deal found 3/20$171
This CheapOair deal was found by Cheapflights users on 3/20. 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 5/612:55 pm
CVG
-
ONT
1 stop24h 10m
Frontier
Mon 5/116:00 am
ONT
-
CVG
1 stop27h 00m
Frontier
Deal found 3/20$171
This Frontier deal was found by Cheapflights users on 3/19. 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 5/77:08 pm
BNA
-
ONT
1 stop6h 41m
Frontier
Mon 5/116:00 am
ONT
-
BNA
1 stop11h 35m
Frontier
Deal found 3/19$185
This Expedia deal was found by Cheapflights users on 3/21. 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 5/18:17 pm
CVG
-
ONT
1 stop6h 38m
Frontier
Sun 5/106:00 am
ONT
-
CVG
1 stop27h 00m
Frontier
Deal found 3/21$185
This CheapOair deal was found by Cheapflights users on 3/19. 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 4/176:10 pm
BNA
-
ONT
1 stop7h 45m
Frontier
Sat 4/1812:59 am
ONT
-
BNA
1 stop14h 29m
Frontier
Deal found 3/19$196
This Booking.com deal was found by Cheapflights users on 3/20. 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.
Wed 5/1312:55 pm
CVG
-
ONT
1 stop13h 54m
Frontier
Tue 5/196:00 am
ONT
-
CVG
1 stop27h 00m
Frontier
Deal found 3/20$198
This Expedia deal was found by Cheapflights users on 3/20. 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.
Sun 4/58:48 pm
CVG
-
ONT
1 stop26h 19m
Frontier
Tue 4/76:20 am
ONT
-
CVG
1 stop29h 02m
Frontier
Deal found 3/20$200
This Frontier deal was found by Cheapflights users on 3/21. 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 4/1612:19 pm
BNA
-
ONT
1 stop13h 36m
Frontier
Sun 4/1912:59 am
ONT
-
BNA
1 stop12h 56m
Frontier
Deal found 3/21$205
This Frontier deal was found by Cheapflights users on 3/20. 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 4/168:12 pm
CVG
-
ONT
1 stop6h 43m
Frontier
Fri 4/176:15 am
ONT
-
CVG
1 stop10h 08m
Frontier
Deal found 3/20$205
This Frontier deal was found by Cheapflights users on 3/21. 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.
Mon 4/208:38 pm
CVG
-
ONT
1 stop17h 06m
Frontier
Sun 4/2612:59 am
ONT
-
CVG
1 stop16h 25m
Frontier
Deal found 3/21$206

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 March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$161
(Frontier)

One-way from

$80
(Frontier)

Popular in

December

Cheapest in

July

Average price

$471
Provider with most accurate pricing for Louisville Intl-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Los Angeles 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. 19% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 21, 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

Sat 9/12

5:49 pm-11:59 pm

1 stop8h 10m

Ontario

Mon 9/21

12:00 pm-11:59 pm

1 stop9h 59m

$297

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 4/16

6:30 am-11:20 am

1 stop7h 50m

Ontario

Wed 4/22

11:55 pm-9:55 am

1 stop7h 00m

$327

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Sat 4/18

7:05 am-11:36 am

1 stop7h 31m

Ontario

Sat 4/25

10:15 pm-8:52 am

1 stop7h 37m

$333

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sun 5/31

7:27 pm-11:34 pm

1 stop6h 07m

Ontario

Mon 8/24

10:59 pm-9:49 am

1 stop8h 50m

$349

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 4/4

4:56 pm-10:31 pm

1 stop7h 35m

Ontario

Sat 4/11

1:27 pm-11:50 pm

1 stop8h 23m

$350

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 5/5

4:35 pm-9:50 pm

1 stop7h 15m

Ontario

Fri 5/8

10:10 am-3:55 pm

Nonstop3h 45m

$367

BlountvilleOntario

TRI - ONT

TRIONT

Blountville Tri Cities TN/VA

Fri 9/11

12:49 pm-6:01 pm

1 stop8h 12m

Ontario

Mon 9/14

10:59 pm-9:35 am

1 stop7h 36m

$369

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Wed 5/13

5:52 pm-11:34 pm

2 stops8h 42m

Ontario

Tue 5/19

10:00 pm-9:21 am

1 stop8h 21m

$374

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Wed 4/15

4:35 pm-9:50 pm

1 stop7h 15m

Ontario

Sat 4/18

6:00 am-2:45 pm

1 stop6h 45m

$387
Quickest round-trip

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Mon 4/20

7:20 pm-11:05 pm

1 stop5h 45m

Ontario

Sat 4/25

9:45 am-3:30 pm

Nonstop3h 45m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 60 resultsSorted by cheapest first
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2
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6

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 $98). Flying from Kentucky to Ontario in April is currently the most expensive (average of $328). 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.

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 most popular routes from Kentucky to Ontario?

    While some choose either Cincinnati Cinci./N. Kentucky - Ontario or Louisville Intl - 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, May is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $98). Flying from Kentucky to Ontario in April is currently the most expensive (average of $328). 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 March 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$452FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$344FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$306Average$403FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$344Average$607FlexibilityNo cancel feeOn-time69%

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