What airlines fly to Ontario?

American Airlines, Spirit Airlines and Delta are the top three most popular airlines that fly to Ontario from Kentucky according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 5 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Ontario?

Average flight duration from Kentucky to Ontario depends on which airport you fly into and out of. Flying from Louisville to Los Angeles is 4h 30m on average, while flying from Lexington to Los Angeles is 7h 16m on average. Los Angeles is the most popular airport in Ontario.

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

As of September 2025, there are 5 flights per week flying from Kentucky to Ontario. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.

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

Frontier, American Airlines, and United Airlines are the most popular carriers operating from Kentucky to Ontario

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

Prices for flights from Kentucky to Ontario Airport refresh daily.

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

As of September 2025, there are 5 operators available to choose from for flights from Kentucky to Ontario Airport.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Kentucky to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$44 Cheap Flights from Kentucky to Ontario in 2025/26

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Find the cheapest flights from Kentucky to Los Angeles

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:00 am - 11:50 pmBNA-ONT

18h 50m1 stop

7:04 am - 11:59 pmONT-BNA

14h 55m1 stop

$145Frontier

Find Deal

Sat, Oct 18 - Sat, Oct 25

6:05 am - 11:10 amCVG-ONT

8h 05m1 stop

12:05 pm - 11:59 pmONT-CVG

8h 54m1 stop

$150Frontier

Find Deal

Fri, Nov 14 - Sat, Nov 15

6:12 am - 11:50 pmBNA-ONT

19h 38m1 stop

6:53 am - 3:10 pmONT-BNA

30h 17m2 stops

$199Multiple Airlines

Find Deal

Thu, Oct 23 - Wed, Oct 29

6:12 am - 11:50 pmBNA-ONT

19h 38m1 stop

8:00 am - 1:48 pmONT-BNA

27h 48m1 stop

$210Multiple Airlines

Find Deal

Thu, Oct 23 - Wed, Oct 29

7:16 pm - 11:52 pmBNA-ONT

6h 36m1 stop

11:29 am - 11:57 pmONT-BNA

10h 28m1 stop

$257Delta

Find Deal

Tue, Mar 10 - Wed, Mar 11

7:15 pm - 11:39 pmBNA-ONT

6h 24m1 stop

10:30 pm - 8:22 amONT-BNA

7h 52m1 stop

$277Delta

Find Deal

Mon, Oct 27 - Mon, Jan 12

7:32 am - 11:57 amSDF-ONT

7h 25m1 stop

12:47 pm - 10:25 pmONT-SDF

6h 38m1 stop

$317American Airlines

Find Deal

Wed, Oct 8 - Wed, Oct 22

7:32 am - 11:57 amSDF-ONT

7h 25m1 stop

10:09 am - 11:24 pmONT-SDF

10h 15m2 stops

$322American Airlines

Find Deal

Wed, Oct 8 - Wed, Oct 22

10:40 am - 3:21 pmLEX-ONT

7h 41m1 stop

1:34 pm - 10:25 pmONT-LEX

5h 51m1 stop

$349United Airlines

Find Deal

Thu, Nov 27 - Sat, Dec 6

6:01 pm - 10:30 pmLEX-ONT

7h 29m1 stop

7:02 am - 5:20 pmONT-LEX

7h 18m1 stop

$379United Airlines

Find Deal

Fri, Oct 10 - Tue, Oct 14

Frontier flights from Kentucky to Ontario

Our best Frontier deals on Kentucky to Ontario flight tickets

Frontier

Oct 18

BNA7:00 amNashville Intl

18h 50m

1 stop

ONT11:50 pmOntario

Oct 25

ONT7:04 amOntario

14h 55m

1 stop

BNA11:59 pmNashville Intl

$145

Find similar

Frontier

Nov 14

CVG6:05 amCincinnati Cinci./N. Kentucky

8h 05m

1 stop

ONT11:10 amOntario

Nov 15

ONT12:05 pmOntario

8h 54m

1 stop

CVG11:59 pmCincinnati Cinci./N. Kentucky

$150

Find similar

Frontier

Oct 17

TYS8:17 pmKnoxville McGhee Tyson

6h 33m

1 stop

ONT11:50 pmOntario

Oct 26

ONT6:53 amOntario

9h 39m

1 stop

TYS7:32 pmKnoxville McGhee Tyson

$151

Find similar

Delta flights from Kentucky to Ontario

Our best Delta deals on Kentucky to Ontario flight tickets

Delta

Mar 10

BNA7:16 pmNashville Intl

6h 36m

1 stop

ONT11:52 pmOntario

Mar 11

ONT11:29 amOntario

10h 28m

1 stop

BNA11:57 pmNashville Intl

$257

Find similar

Delta

Oct 27

BNA7:15 pmNashville Intl

6h 24m

1 stop

ONT11:39 pmOntario

Jan 12

ONT10:30 pmOntario

7h 52m

1 stop

BNA8:22 amNashville Intl

$277

Find similar

Delta

Oct 18

BNA5:15 amNashville Intl

7h 11m

1 stop

ONT10:26 amOntario

Oct 25

ONT1:15 pmOntario

6h 45m

1 stop

BNA10:00 pmNashville Intl

$278

Find similar

Fly from

Fly to

Route

Depart

Return

Price

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 10/18

7:00 am-11:50 pm

1 stop18h 50m

Ontario

Sat 10/25

7:04 am-11:59 pm

1 stop14h 55m

$145

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Fri 11/14

6:05 am-11:10 am

1 stop8h 05m

Ontario

Sat 11/15

12:05 pm-11:59 pm

1 stop8h 54m

$150

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 10/23

6:12 am-11:50 pm

1 stop19h 38m

Ontario

Wed 10/29

6:53 am-3:10 pm

2 stops30h 17m

$199

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 10/23

6:12 am-11:50 pm

1 stop19h 38m

Ontario

Wed 10/29

8:00 am-1:48 pm

1 stop27h 48m

$210

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 3/10

7:16 pm-11:52 pm

1 stop6h 36m

Ontario

Wed 3/11

11:29 am-11:57 pm

1 stop10h 28m

$257

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Mon 10/27

7:15 pm-11:39 pm

1 stop6h 24m

Ontario

Mon 1/12

10:30 pm-8:22 am

1 stop7h 52m

$277

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 10/8

7:32 am-11:57 am

1 stop7h 25m

Ontario

Wed 10/22

12:47 pm-10:25 pm

1 stop6h 38m

$317

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 10/8

7:32 am-11:57 am

1 stop7h 25m

Ontario

Wed 10/22

10:09 am-11:24 pm

2 stops10h 15m

$322

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Thu 11/27

10:40 am-3:21 pm

1 stop7h 41m

Ontario

Sat 12/6

1:34 pm-10:25 pm

1 stop5h 51m

$349

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Fri 10/10

6:01 pm-10:30 pm

1 stop7h 29m

Ontario

Tue 10/14

7:02 am-5:20 pm

1 stop7h 18m

$379

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 Kentucky to Ontario

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 Ontario?

In general, August is the cheapest month to fly from Kentucky to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $344. If you aren’t able to travel during the month of August, then book flights to Ontario from Kentucky during April instead. Flights to Ontario in April, while not as cheap as those in August, still average around $364.

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

The cheapest day to depart on your flight to Ontario is on a Thursday when prices can be found for as low as $461. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Kentucky to Ontario for around $597.

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

In the evening is the cheapest time of day to fly from Kentucky to Ontario when you can find flight prices for as low as $417. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $665 on average. Flights to Ontario from Kentucky at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap Kentucky to Ontario flight deals and tips

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

Fastest flight time	4h 10m
Direct flights	Every day
Airports in Ontario	1 airport

The fastest flight from Kentucky to Ontario takes 4h 10m

Direct flights go from Kentucky to Ontario every day.

There is 1 airport near Ontario: Ontario (ONT)

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When did momondo last update prices for flights from Kentucky to Ontario Airport?
Prices for flights from Kentucky to Ontario Airport refresh daily.
How many operators does momondo search for flights from Kentucky to Ontario Airport?
As of September 2025, there are 5 operators available to choose from for flights from Kentucky to Ontario Airport.
How old do you have to be to fly from Kentucky to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Kentucky to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Kentucky to Ontario

Compare and see reviews for airlines that fly from Kentucky to Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $257	Free Cancellation	Rating 7.4 8,925 reviews	Search United Airlines flights
American Airlines	PriceFrom $268	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $288	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
Southwest	PriceFrom $315	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights

Why use momondo?

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

Finding the right flight to Ontario from Kentucky is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Ontario from Kentucky with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Kentucky to Ontario.

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

If you are not ready to book a flight from Kentucky to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.