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

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

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 50m on average, while flying from Lexington to Los Angeles is 6h 47m 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 July 2026, there are 11 flights per week flying from Kentucky to Ontario. The most common day of the week flights depart is Mon, with 27% of flights taking off on this day.

What airlines fly to Ontario?

American Airlines, Delta and Southwest 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 40% 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.

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 July 2026, 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.

$82 Cheap Flights from Kentucky to Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Kentucky to Los Angeles

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:55 pm - 11:50 pm

BNA

ONT

12h 55m

1 stop

7:56 pm - 12:10 pm

ONT

BNA

14h 14m

1 stop

$160Frontier

Wed, Aug 19 - Wed, Aug 26

7:42 pm - 10:43 am

BNA

ONT

17h 01m

1 stop

6:00 am - 6:47 pm

ONT

BNA

10h 47m

1 stop

$213Frontier

Thu, Sep 10 - Wed, Sep 16

7:00 am - 11:50 pm

TYS

ONT

19h 50m

1 stop

10:49 am - 2:01 pm

ONT

TYS

24h 12m

2 stops

$236Multiple Airlines

Thu, Aug 13 - Thu, Aug 20

7:00 am - 11:50 pm

TYS

ONT

19h 50m

1 stop

3:40 pm - 9:46 pm

ONT

TYS

27h 06m

1 stop

$268Multiple Airlines

Thu, Aug 13 - Thu, Aug 20

1:17 pm - 6:30 pm

SDF

ONT

8h 13m

1 stop

7:05 am - 7:42 pm

ONT

SDF

9h 37m

1 stop

$289Delta

Mon, Aug 10 - Sat, Aug 15

12:10 pm - 10:00 pm

SDF

ONT

12h 50m

1 stop

2:40 pm - 11:05 pm

ONT

SDF

5h 25m

1 stop

$294Southwest

Wed, Aug 5 - Mon, Aug 10

7:05 am - 10:42 am

SDF

ONT

6h 37m

1 stop

12:00 pm - 12:09 am

ONT

SDF

9h 09m

1 stop

$302Delta

Tue, Sep 1 - Sat, Sep 5

11:05 am - 3:05 pm

SDF

ONT

7h 00m

1 stop

2:10 pm - 11:00 pm

ONT

SDF

5h 50m

1 stop

$315Southwest

Thu, Aug 13 - Wed, Aug 19

7:55 pm - 11:52 pm

LEX

ONT

6h 57m

1 stop

11:59 pm - 12:00 pm

ONT

LEX

9h 01m

1 stop

$340American Airlines

Wed, Oct 14 - Mon, Oct 19

6:03 am - 9:34 am

TYS

ONT

6h 31m

1 stop

12:33 pm - 11:18 pm

ONT

TYS

7h 45m

1 stop

$355American Airlines

Thu, Sep 3 - Sun, Sep 6

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United Airlines flights from Kentucky to Ontario

Our best United Airlines deals on Kentucky to Ontario flight tickets

United Airlines

Aug 29

SDF8:00 amLouisville Intl

10h 41m

2 stops

ONT3:41 pmOntario

Sep 4

ONT1:18 pmOntario

6h 13m

1 stop

SDF10:31 pmLouisville Intl

$378

United Airlines

Aug 12

SDF8:00 amLouisville Intl

7h 50m

1 stop

ONT12:50 pmOntario

Aug 19

ONT5:00 amOntario

6h 29m

1 stop

SDF2:29 pmLouisville Intl

$389

United Airlines

Aug 12

SDF8:00 amLouisville Intl

13h 16m

2 stops

ONT6:16 pmOntario

Aug 15

ONT5:00 amOntario

6h 29m

1 stop

SDF2:29 pmLouisville Intl

$394

Frontier flights from Kentucky to Ontario

Our best Frontier deals on Kentucky to Ontario flight tickets

Frontier

Aug 19

BNA12:55 pmNashville Intl

12h 55m

1 stop

ONT11:50 pmOntario

Aug 26

ONT7:56 pmOntario

14h 14m

1 stop

BNA12:10 pmNashville Intl

$160

Frontier

Sep 10

BNA7:42 pmNashville Intl

17h 01m

1 stop

ONT10:43 amOntario

Sep 16

ONT6:00 amOntario

10h 47m

1 stop

BNA6:47 pmNashville Intl

$213

Frontier

Sep 5

BNA12:55 pmNashville Intl

12h 55m

1 stop

ONT11:50 pmOntario

Sep 11

ONT6:00 amOntario

10h 47m

1 stop

BNA6:47 pmNashville Intl

$222

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Wed 8/19

12:55 pm-11:50 pm

1 stop12h 55m

Ontario

Wed 8/26

7:56 pm-12:10 pm

1 stop14h 14m

$160

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 9/10

7:42 pm-10:43 am

1 stop17h 01m

Ontario

Wed 9/16

6:00 am-6:47 pm

1 stop10h 47m

$213

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 8/13

7:00 am-11:50 pm

1 stop19h 50m

Ontario

Thu 8/20

10:49 am-2:01 pm

2 stops24h 12m

$236

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 8/13

7:00 am-11:50 pm

1 stop19h 50m

Ontario

Thu 8/20

3:40 pm-9:46 pm

1 stop27h 06m

$268

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Mon 8/10

1:17 pm-6:30 pm

1 stop8h 13m

Ontario

Sat 8/15

7:05 am-7:42 pm

1 stop9h 37m

$289

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Wed 8/5

12:10 pm-10:00 pm

1 stop12h 50m

Ontario

Mon 8/10

2:40 pm-11:05 pm

1 stop5h 25m

$294

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Tue 9/1

7:05 am-10:42 am

1 stop6h 37m

Ontario

Sat 9/5

12:00 pm-12:09 am

1 stop9h 09m

$302

Quickest round-trip

LouisvilleOntario

SDF - ONT

SDFONT

Louisville Intl

Thu 8/13

11:05 am-3:05 pm

1 stop7h 00m

Ontario

Wed 8/19

2:10 pm-11:00 pm

1 stop5h 50m

$315

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Wed 10/14

7:55 pm-11:52 pm

1 stop6h 57m

Ontario

Mon 10/19

11:59 pm-12:00 pm

1 stop9h 01m

$340

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 9/3

6:03 am-9:34 am

1 stop6h 31m

Ontario

Sun 9/6

12:33 pm-11:18 pm

1 stop7h 45m

$355

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, October 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 $358. If you aren’t able to travel during the month of October, then book flights to Ontario from Kentucky during March instead. Flights to Ontario in March, while not as cheap as those in October, still average around $359.

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 05m
Direct flights	Every day
Airports in Ontario	1 airport

The fastest flight from Kentucky to Ontario takes 4h 05m

Direct flights go from Kentucky to Ontario every day.

There is 1 airport in Ontario. From Kentucky there are direct flights to Ontario (ONT).

Search flight deals

Frequently asked questions about flying 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 July 2026, 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
American Airlines	PriceFrom $268	Free Cancellation	Rating 7.1 11,836 reviews	Search American Airlines flights
Delta	PriceFrom $288	Free Cancellation	Rating 7.8 8,472 reviews	Search Delta flights
Southwest	PriceFrom $306	Free Cancellation	Rating 8.0 4,238 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.

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Cheap flights from Kentucky to Los Angeles from $82

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Kentucky to Los Angeles departing on 8/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Kentucky to Ontario

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Our best Frontier deals on Kentucky to Ontario flight tickets

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How to get the cheapest flight ticket from Kentucky to Ontario

What is the cheapest month to fly to Ontario?

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

How long does it take to fly to Ontario?

Cheap Kentucky to Ontario flight deals and tips

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Frequently asked questions about flying from Kentucky to Ontario

Best airlines flying from Kentucky to Ontario

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

Why use momondo?

An easier way to manage your Ontario 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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