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$119+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
aug 1 — aug 81
lör 8/1
lör 8/8
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 juli 2, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons 8/1212:25 pm
BNA
-
ONT
1 stop13h 25m
Frontier
tis 8/187:56 pm
ONT
-
BNA
1 stop14h 14m
Frontier
Deal found 7/1$241
This Frontier deal was found by Cheapflights users on 6/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tis 9/297:42 pm
BNA
-
ONT
1 stop6h 13m
Frontier
ons 9/306:00 am
ONT
-
BNA
1 stop10h 47m
Frontier
Deal found 6/29$248
This Frontier deal was found by Cheapflights users on 7/1. 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.
tis 8/118:34 pm
CVG
-
ONT
1 stop6h 16m
Frontier
ons 8/126:00 am
ONT
-
CVG
1 stop10h 29m
Frontier
Deal found 7/1$248
This Frontier deal was found by Cheapflights users on 7/1. 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.
lör 7/2512:17 pm
BNA
-
ONT
1 stop23h 47m
Frontier
lör 8/110:49 am
ONT
-
BNA
1 stop22h 43m
Frontier
Deal found 7/1$249
This Frontier deal was found by Cheapflights users on 6/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tors 8/63:41 pm
BNA
-
ONT
1 stop18h 22m
Frontier
ons 8/121:38 pm
ONT
-
BNA
1 stop23h 08m
Frontier
Deal found 6/29$252
This Frontier deal was found by Cheapflights users on 6/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tors 9/107:42 pm
BNA
-
ONT
1 stop6h 13m
Frontier
tis 9/156:00 am
ONT
-
BNA
1 stop10h 47m
Frontier
Deal found 6/29$253
This Frontier deal was found by Cheapflights users on 6/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons 7/298:36 pm
CVG
-
ONT
1 stop6h 14m
Frontier
lör 8/86:00 am
ONT
-
CVG
1 stop10h 29m
Frontier
Deal found 6/29$253
This Super.com deal was found by Cheapflights users on 6/30. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons 8/1912:55 pm
BNA
-
ONT
1 stop12h 55m
Frontier
ons 8/267:56 pm
ONT
-
BNA
1 stop14h 14m
Frontier
Deal found 6/30$255
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tis 7/288:36 pm
CVG
-
ONT
1 stop16h 28m
Frontier
sön 8/28:17 am
ONT
-
CVG
1 stop7h 05m
Frontier
Deal found 7/1$255
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tors 7/309:30 pm
CVG
-
ONT
1 stop13h 33m
Frontier
sön 8/28:17 am
ONT
-
CVG
1 stop7h 05m
Frontier
Deal found 7/1$256
This CheapOair deal was found by Cheapflights users on 7/1. 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.
ons 8/512:25 pm
BNA
-
ONT
1 stop13h 25m
Frontier
lör 8/810:49 am
ONT
-
BNA
1 stop22h 51m
Frontier
Deal found 7/1$258
This CheapOair deal was found by Cheapflights users on 6/30. 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.
lör 10/312:25 pm
CVG
-
ONT
1 stop14h 30m
Frontier
lör 10/1011:38 am
ONT
-
CVG
1 stop9h 51m
Frontier
Deal found 6/30$258

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 juli 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$241
(Kiwi.com)

One-way from

$119
(Trip.com)

Popular in

April

Cheapest in

September

Average price

$270
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. 18% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 juli 2, 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

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

ons 9/30

6:00 am-11:07 am

1 stop8h 07m

Ontario

lör 10/3

12:17 pm-11:59 pm

1 stop8h 42m

$287

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

tis 8/11

7:30 am-12:16 pm

1 stop6h 46m

Ontario

mån 8/17

6:00 am-1:57 pm

1 stop5h 57m

$335

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

tors 10/22

10:54 am-6:13 pm

1 stop9h 19m

Ontario

mån 10/26

12:18 pm-8:42 pm

1 stop6h 24m

$335

BlountvilleOntario

TRI - ONT

TRIONT

Blountville Tri Cities TN/VA

tors 11/5

6:00 am-11:08 am

1 stop8h 08m

Ontario

tis 11/10

7:00 am-6:11 pm

1 stop8h 11m

$349

BlountvilleOntario

TRI - ONT

TRIONT

Blountville Tri Cities TN/VA

tors 8/20

1:45 pm-6:30 pm

1 stop7h 45m

Ontario

tis 9/1

12:00 pm-10:23 pm

1 stop7h 23m

$349

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

ons 7/15

8:19 pm-10:04 am

1 stop16h 45m

Ontario

fre 7/24

6:00 am-7:24 pm

1 stop10h 24m

$350

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

ons 9/30

6:00 am-11:07 am

1 stop8h 07m

Ontario

tors 10/8

11:15 pm-9:54 am

1 stop7h 39m

$354

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

tors 9/17

4:50 pm-10:10 pm

1 stop8h 20m

Ontario

tis 9/22

7:25 am-6:55 pm

1 stop8h 30m

$367

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

tors 9/17

6:02 pm-10:59 pm

1 stop7h 57m

Ontario

tis 9/22

6:00 am-6:15 pm

1 stop9h 15m

$367

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

tis 8/11

5:40 am-10:42 am

1 stop8h 02m

Ontario

tis 8/18

1:06 pm-10:41 pm

1 stop6h 35m

$367

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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 November is currently the most expensive (average of $482). 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 juli 2, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Kentucky to Ontario as you normally would.

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 8h 07m. Kentucky and Ontario are separated by a distance of 1791 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 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, 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 November is currently the most expensive (average of $482). 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 juli 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$450FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$344FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$315Average$476FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$337Average$607FlexibilityNo cancel feeOn-time69%

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