What is the cheapest airline that flies from Ontario to Kentucky?

Frontier, Southwest, and Delta are the most popular carriers operating from Ontario to Kentucky

What airlines fly to Kentucky?

American Airlines, Southwest and Delta are the top three most popular airlines that fly to Kentucky from Ontario according to our data. American Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Kentucky. Keep in mind that there are 6 different airlines that fly to Kentucky on a routine basis, so you have a few additional options to choose from.

How many flights depart from Ontario to Kentucky on average per week?

6 flights are operational weekly from Ontario to Kentucky as of June 2026. The most popular departure day for this route is Sun, with 33% of flights per week taking off on this day.

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?

As of June 2026, there are 7 operators available to choose from 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.

$124 Cheap Flights from Ontario to Kentucky in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Kentucky

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 7:29 pm

ONT

CVG

10h 29m

1 stop

8:30 pm - 11:55 pm

CVG

ONT

6h 25m

1 stop

$258Frontier

Wed, Aug 12 - Wed, Aug 19

6:00 am - 7:24 pm

ONT

TYS

10h 24m

1 stop

8:19 pm - 11:50 pm

TYS

ONT

6h 31m

1 stop

$260Frontier

Wed, Aug 5 - Wed, Aug 12

10:00 pm - 9:16 am

ONT

LEX

8h 16m

1 stop

3:27 pm - 9:50 pm

LEX

ONT

9h 23m

1 stop

$340Delta

Thu, Jul 16 - Tue, Jul 28

7:05 am - 6:18 pm

ONT

SDF

8h 13m

1 stop

7:03 am - 11:43 am

SDF

ONT

7h 40m

1 stop

$341American Airlines

Wed, Aug 5 - Tue, Aug 11

7:05 am - 6:18 pm

ONT

SDF

8h 13m

1 stop

8:16 am - 6:15 pm

SDF

ONT

12h 59m

2 stops

$346American Airlines

Wed, Aug 5 - Tue, Aug 11

1:18 pm - 10:31 pm

ONT

SDF

6h 13m

1 stop

10:23 am - 8:01 pm

SDF

ONT

12h 38m

2 stops

$355United Airlines

Thu, Aug 13 - Sat, Aug 15

9:40 am - 8:35 pm

ONT

SDF

7h 55m

2 stops

3:20 pm - 8:20 pm

SDF

ONT

8h 00m

2 stops

$360Southwest

Wed, Aug 12 - Thu, Aug 13

10:00 pm - 9:25 am

ONT

LEX

8h 25m

1 stop

1:02 pm - 6:30 pm

LEX

ONT

8h 28m

1 stop

$365Delta

Fri, Jul 3 - Wed, Jul 22

5:45 am - 8:29 pm

ONT

LEX

11h 44m

2 stops

5:55 pm - 10:51 pm

LEX

ONT

7h 56m

1 stop

$369United Airlines

Sat, Jul 11 - Sat, Jul 18

2:50 pm - 12:20 am

ONT

SDF

6h 30m

1 stop

5:25 pm - 10:50 pm

SDF

ONT

8h 25m

2 stops

$376Southwest

Wed, Jul 22 - Tue, Jul 28

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Frontier flights from Ontario to Kentucky

Our best Frontier deals on Ontario to Kentucky flight tickets

Frontier

Aug 12

ONT6:00 amOntario

10h 29m

1 stop

CVG7:29 pmCincinnati Cinci./N. Kentucky

Aug 19

CVG8:30 pmCincinnati Cinci./N. Kentucky

6h 25m

1 stop

ONT11:55 pmOntario

$258

Frontier

Aug 5

ONT6:00 amOntario

10h 24m

1 stop

TYS7:24 pmKnoxville McGhee Tyson

Aug 12

TYS8:19 pmKnoxville McGhee Tyson

6h 31m

1 stop

ONT11:50 pmOntario

$260

Frontier

Aug 6

ONT6:00 amOntario

10h 29m

1 stop

CVG7:29 pmCincinnati Cinci./N. Kentucky

Aug 12

CVG8:34 pmCincinnati Cinci./N. Kentucky

16h 30m

1 stop

ONT10:04 amOntario

$261

Delta flights from Ontario to Kentucky

Our best Delta deals on Ontario to Kentucky flight tickets

Delta

Jul 16

ONT10:00 pmOntario

8h 16m

1 stop

LEX9:16 amLexington Blue Grass

Jul 28

LEX3:27 pmLexington Blue Grass

9h 23m

1 stop

ONT9:50 pmOntario

$340

Delta

Jul 3

ONT10:00 pmOntario

8h 25m

1 stop

LEX9:25 amLexington Blue Grass

Jul 22

LEX1:02 pmLexington Blue Grass

8h 28m

1 stop

ONT6:30 pmOntario

$365

Delta

Aug 10

ONT10:00 pmOntario

8h 24m

1 stop

LEX9:24 amLexington Blue Grass

Aug 15

LEX1:06 pmLexington Blue Grass

8h 23m

1 stop

ONT6:29 pmOntario

$374

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioCincinnati

ONT - CVG

ONTCVG

Ontario

Wed 8/12

6:00 am-7:29 pm

1 stop10h 29m

Cincinnati Cinci./N. Kentucky

Wed 8/19

8:30 pm-11:55 pm

1 stop6h 25m

$258

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 8/5

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Wed 8/12

8:19 pm-11:50 pm

1 stop6h 31m

$260

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Thu 7/16

10:00 pm-9:16 am

1 stop8h 16m

Lexington Blue Grass

Tue 7/28

3:27 pm-9:50 pm

1 stop9h 23m

$340

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 8/5

7:05 am-6:18 pm

1 stop8h 13m

Louisville Intl

Tue 8/11

7:03 am-11:43 am

1 stop7h 40m

$341

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 8/5

7:05 am-6:18 pm

1 stop8h 13m

Louisville Intl

Tue 8/11

8:16 am-6:15 pm

2 stops12h 59m

$346

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Thu 8/13

1:18 pm-10:31 pm

1 stop6h 13m

Louisville Intl

Sat 8/15

10:23 am-8:01 pm

2 stops12h 38m

$355

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 8/12

9:40 am-8:35 pm

2 stops7h 55m

Louisville Intl

Thu 8/13

3:20 pm-8:20 pm

2 stops8h 00m

$360

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Fri 7/3

10:00 pm-9:25 am

1 stop8h 25m

Lexington Blue Grass

Wed 7/22

1:02 pm-6:30 pm

1 stop8h 28m

$365

OntarioLexington

ONT - LEX

ONTLEX

Ontario

Sat 7/11

5:45 am-8:29 pm

2 stops11h 44m

Lexington Blue Grass

Sat 7/18

5:55 pm-10:51 pm

1 stop7h 56m

$369

Quickest round-trip

OntarioLouisville

ONT - SDF

ONTSDF

Ontario

Wed 7/22

2:50 pm-12:20 am

1 stop6h 30m

Louisville Intl

Tue 7/28

5:25 pm-10:50 pm

2 stops8h 25m

$376

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Kentucky?

If you’re not able to fly to Kentucky in July, then August is your next best option. Flight prices from Ontario to Kentucky during August average around $132.

Can stopping save me money on Ontario to Kentucky flights?

You could potentially save up to 26% 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	43 airports

The fastest flight from Ontario to Kentucky takes 3h 40m

Direct flights go from Ontario to Kentucky every day.

There are 43 airports in Kentucky. From Ontario there are direct flights to Nashville Intl (BNA).

Search flight deals

Frequently asked questions about flying from Ontario to Kentucky

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?
As of June 2026, there are 7 operators available to choose from 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
United Airlines	PriceFrom $228	Free Cancellation	Rating 7.4 9,875 reviews	Search United Airlines flights
Delta	PriceFrom $288	Free Cancellation	Rating 7.8 8,426 reviews	Search Delta flights
American Airlines	PriceFrom $326	Free Cancellation	Rating 7.1 11,740 reviews	Search American Airlines flights
Southwest	PriceFrom $350	Free Cancellation	Rating 7.9 4,242 reviews	Search Southwest 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.