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Cheap flights from Ontario to Kentucky from $81

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Kentucky departing on 10/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Kentucky

Cheap round-trip flights

Frontier Logo
12:05 pm - 1:39 amONT-CVG
10h 34m1 stop
Frontier Logo
3:47 pm - 11:50 pmCVG-ONT
11h 03m1 stop
$150Frontier
Find Deal
Thu, Nov 13 - Sat, Nov 15
Frontier Logo
8:34 am - 11:59 pmONT-CVG
12h 25m1 stop
Frontier Logo
9:52 am - 11:50 pmCVG-ONT
16h 58m1 stop
$151Frontier
Find Deal
Fri, Oct 24 - Sat, Nov 1
Delta Logo
10:00 pm - 12:58 pmONT-BNA
12h 58m2 stops
Delta Logo
4:50 pm - 11:52 pmBNA-ONT
9h 02m1 stop
$282Delta
Find Deal
Mon, Nov 3 - Tue, Nov 11
Delta Logo
1:15 pm - 10:00 pmONT-BNA
6h 45m1 stop
Delta Logo
7:23 pm - 11:52 pmBNA-ONT
6h 29m1 stop
$285Delta
Find Deal
Fri, Nov 7 - Sun, Nov 9
American Airlines Logo
12:47 pm - 10:01 pmONT-LEX
6h 14m1 stop
American Airlines Logo
3:52 pm - 9:36 pmLEX-ONT
8h 44m1 stop
$289American Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29
American Airlines Logo
1:00 pm - 12:20 amONT-LEX
8h 20m2 stops
American Airlines Logo
6:30 am - 10:07 amLEX-ONT
6h 37m1 stop
$294American Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29
Southwest Logo
3:15 pm - 11:35 pmONT-SDF
5h 20m1 stop
Southwest Logo
5:30 pm - 10:50 pmSDF-ONT
8h 20m1 stop
$346Southwest
Find Deal
Wed, Oct 22 - Mon, Oct 27
United Airlines Logo
1:20 pm - 10:44 pmONT-SDF
6h 24m1 stop
United Airlines Logo
3:22 pm - 8:58 pmSDF-ONT
8h 36m1 stop
$367United Airlines
Find Deal
Sat, Jan 17 - Sat, Jan 24
United Airlines Logo
6:00 am - 6:10 pmONT-TYS
9h 10m1 stop
United Airlines Logo
4:55 pm - 8:44 pmTYS-ONT
6h 49m1 stop
$368United Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
Southwest Logo
8:30 am - 6:10 pmONT-SDF
6h 40m1 stop
Southwest Logo
6:35 am - 10:10 amSDF-ONT
6h 35m1 stop
$387Southwest
Find Deal
Tue, Nov 18 - Fri, Nov 21

Delta flights from Ontario to Kentucky

Our best Delta deals on Ontario to Kentucky flight tickets
Delta
Nov 3
ONT10:00 pmOntario
12h 58m
2 stops
BNA12:58 pmNashville Intl
Nov 11
BNA4:50 pmNashville Intl
9h 02m
1 stop
ONT11:52 pmOntario
$282
Find similar
Delta
Nov 7
ONT1:15 pmOntario
6h 45m
1 stop
BNA10:00 pmNashville Intl
Nov 9
BNA7:23 pmNashville Intl
6h 29m
1 stop
ONT11:52 pmOntario
$285
Find similar
Delta
Dec 10
ONT6:00 amOntario
9h 08m
2 stops
BNA5:08 pmNashville Intl
Dec 14
BNA5:15 amNashville Intl
7h 25m
1 stop
ONT10:40 amOntario
$286
Find similar

Frontier flights from Ontario to Kentucky

Our best Frontier deals on Ontario to Kentucky flight tickets
Frontier
Nov 13
ONT12:05 pmOntario
10h 34m
1 stop
CVG1:39 amCincinnati Cinci./N. Kentucky
Nov 15
CVG3:47 pmCincinnati Cinci./N. Kentucky
11h 03m
1 stop
ONT11:50 pmOntario
$150
Find similar
Frontier
Oct 24
ONT8:34 amOntario
12h 25m
1 stop
CVG11:59 pmCincinnati Cinci./N. Kentucky
Nov 1
CVG9:52 amCincinnati Cinci./N. Kentucky
16h 58m
1 stop
ONT11:50 pmOntario
$151
Find similar
Frontier
Oct 27
ONT6:53 amOntario
15h 46m
1 stop
CVG1:39 amCincinnati Cinci./N. Kentucky
Oct 30
CVG11:41 amCincinnati Cinci./N. Kentucky
10h 08m
1 stop
ONT6:49 pmOntario
$152
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 24, 2025.
Use the filters below to find and compare flights from Ontario to Kentucky that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Thu 11/13

12:05 pm-1:39 am

1 stop10h 34m

Cincinnati Cinci./N. Kentucky

Sat 11/15

3:47 pm-11:50 pm

1 stop11h 03m

$150

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Fri 10/24

8:34 am-11:59 pm

1 stop12h 25m

Cincinnati Cinci./N. Kentucky

Sat 11/1

9:52 am-11:50 pm

1 stop16h 58m

$151

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Mon 11/3

10:00 pm-12:58 pm

2 stops12h 58m

Nashville Intl

Tue 11/11

4:50 pm-11:52 pm

1 stop9h 02m

$282

OntarioNashville

ONT - BNA

ONTBNA

Ontario

Fri 11/7

1:15 pm-10:00 pm

1 stop6h 45m

Nashville Intl

Sun 11/9

7:23 pm-11:52 pm

1 stop6h 29m

$285

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Sat 10/25

12:47 pm-10:01 pm

1 stop6h 14m

Lexington Blue Grass

Wed 10/29

3:52 pm-9:36 pm

1 stop8h 44m

$289

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Sat 10/25

1:00 pm-12:20 am

2 stops8h 20m

Lexington Blue Grass

Wed 10/29

6:30 am-10:07 am

1 stop6h 37m

$294

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 10/22

3:15 pm-11:35 pm

1 stop5h 20m

Louisville Intl

Mon 10/27

5:30 pm-10:50 pm

1 stop8h 20m

$346

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Sat 1/17

1:20 pm-10:44 pm

1 stop6h 24m

Louisville Intl

Sat 1/24

3:22 pm-8:58 pm

1 stop8h 36m

$367

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 10/22

6:00 am-6:10 pm

1 stop9h 10m

Knoxville McGhee Tyson

Wed 10/29

4:55 pm-8:44 pm

1 stop6h 49m

$368

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Tue 11/18

8:30 am-6:10 pm

1 stop6h 40m

Louisville Intl

Fri 11/21

6:35 am-10:10 am

1 stop6h 35m

$387

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Kentucky from

How to get the cheapest flight ticket from Ontario to Kentucky

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Kentucky?

If you’re not able to fly to Kentucky in February, then August is your next best option. Flight prices from Ontario to Kentucky during August average around $406.

What is the cheapest day to depart on your flight to Kentucky?

Our data shows that Saturday is the least expensive day to fly to Kentucky. Tickets to fly out on this day can be as low as $483. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $516. These prices are subject to change though, so be sure to set up a Price Alert for flights to Kentucky.

What is the cheapest time of day to depart on your flight to Kentucky?

According to our data, the cheapest time of day to fly to Kentucky is in the evening. momondo users have found flights departing from Ontario to Kentucky in the evening for as low as $492. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Kentucky is in the afternoon when prices are around $536.

Can stopping save me money on Ontario to Kentucky flights?

You could potentially save up to 18% on your flight if you consider stops on a Ontario to Kentucky flight.

Cheap Ontario to Kentucky flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Kentucky

Fastest flight time

3h 40m

Direct flights

Every day

Airports in Kentucky

1 airport
The fastest flight from Ontario to Kentucky takes 3h 40m
Direct flights go from Ontario to Kentucky every day.
There is 1 airport near Kentucky: Nashville Intl (BNA)
Search flight deals

  • When did momondo last update prices for flights from Ontario Airport to Kentucky?

    Prices for flights from Ontario Airport to Kentucky were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Kentucky?

  • How old do you have to be to fly from Ontario Airport to Kentucky?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Kentucky.

  • What documentation or ID do you need to fly to Kentucky?

    The travel and health documents required for your trip to Kentucky can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Kentucky. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Kentucky

Compare and see reviews for airlines that fly from Ontario to Kentucky with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $248Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
7,973 reviews
Search Delta flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
United AirlinesPriceFrom $343Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Kentucky?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Kentucky for you.

Can I find flights from Ontario to Kentucky with flexible booking policies on momondo?

Flights from Ontario to Kentucky with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Kentucky?

Once all potential Ontario to Kentucky flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Kentucky right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Kentucky from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Kentucky trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Fri 10/24
Fri 10/31
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