What airlines fly to Ontario?

American Airlines, Southwest 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 36% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 6 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Southwest, United Airlines, and American Airlines 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 6h 29m on average, while flying from Lexington to Los Angeles is 7h 06m on average. Los Angeles is the most popular airport in 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 October 2026, there are 4 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.

$140 Cheap Flights from Kentucky to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Kentucky to Los Angeles

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:10 pm - 11:01 pmSDF Louisville Intl-ONT Ontario

7h 51m1 stop Charlotte Douglas

2:09 pm - 12:15 amONT Ontario-SDF Louisville Intl

7h 06m1 stop Dallas/Fort Worth

$279American Airlines

Thu, Nov 12 - Mon, Nov 23

1:01 pm - 7:49 pmSDF Louisville Intl-ONT Ontario

9h 48m1 stop Atlanta Hartsfield-Jackson

12:20 pm - 9:51 pmONT Ontario-SDF Louisville Intl

6h 31m1 stop Atlanta Hartsfield-Jackson

$279Delta

Thu, Nov 26 - Tue, Dec 1

6:50 am - 10:10 amSDF Louisville Intl-ONT Ontario

6h 20m1 stop Denver Intl

11:55 pm - 10:30 amONT Ontario-SDF Louisville Intl

7h 35m1 stop Chicago Midway

$291Southwest

Wed, Nov 11 - Sun, Nov 15

11:30 am - 5:00 pmSDF Louisville Intl-ONT Ontario

8h 30m1 stop Phoenix Sky Harbor Intl

5:00 am - 4:15 pmONT Ontario-SDF Louisville Intl

8h 15m1 stop Phoenix Sky Harbor Intl

$296Southwest

Thu, Jan 28 - Thu, Feb 11

7:00 am - 3:33 pmSDF Louisville Intl-ONT Ontario

11h 33m2 stops Chicago O'Hare Intl San Francisco

5:00 am - 2:22 pmONT Ontario-SDF Louisville Intl

6h 22m1 stop Denver Intl

$318United Airlines

Thu, Nov 12 - Mon, Nov 23

6:00 am - 11:03 amSDF Louisville Intl-ONT Ontario

8h 03m1 stop Atlanta Hartsfield-Jackson

7:05 am - 7:14 pmONT Ontario-SDF Louisville Intl

9h 09m1 stop Atlanta Hartsfield-Jackson

$329Delta

Sat, Nov 14 - Thu, Nov 26

3:00 pm - 9:57 pmSDF Louisville Intl-ONT Ontario

9h 57m1 stop Atlanta Hartsfield-Jackson

7:05 am - 4:54 pmONT Ontario-SDF Louisville Intl

6h 49m1 stop Atlanta Hartsfield-Jackson

$329Delta

Mon, Nov 9 - Thu, Nov 26

9:45 am - 6:16 pmSDF Louisville Intl-ONT Ontario

11h 31m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

6:26 am - 5:22 pmONT Ontario-SDF Louisville Intl

7h 56m1 stop Chicago O'Hare Intl

$338American Airlines

Thu, Jan 14 - Tue, Jan 19

10:37 am - 6:01 pmSDF Louisville Intl-ONT Ontario

10h 24m2 stops Chicago O'Hare Intl San Francisco

5:00 am - 2:22 pmONT Ontario-SDF Louisville Intl

6h 22m1 stop Denver Intl

$341United Airlines

Wed, Nov 11 - Sun, Nov 15

9:45 am - 6:16 pmSDF Louisville Intl-ONT Ontario

11h 31m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

9:28 am - 11:12 pmONT Ontario-SDF Louisville Intl

10h 44m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

$343American Airlines

Thu, Jan 14 - Tue, Jan 19

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 11:06 amLEX Lexington Blue Grass-ONT Ontario

8h 06m1 stop Atlanta Hartsfield-Jackson

12:16 pm - 9:27 pmONT Ontario-LEX Lexington Blue Grass

6h 11m1 stop Atlanta Hartsfield-Jackson

$494Delta

Fri, Oct 30 - Mon, Nov 2

7:10 am - 11:06 amLEX Lexington Blue Grass-ONT Ontario

6h 56m1 stop Atlanta Hartsfield-Jackson

11:05 pm - 9:38 amONT Ontario-LEX Lexington Blue Grass

7h 33m1 stop Atlanta Hartsfield-Jackson

$514Delta

Fri, Oct 30 - Sun, Nov 8

7:10 am - 11:06 amLEX Lexington Blue Grass-ONT Ontario

6h 56m1 stop Atlanta Hartsfield-Jackson

11:05 pm - 9:38 amONT Ontario-LEX Lexington Blue Grass

7h 33m1 stop Atlanta Hartsfield-Jackson

$514Delta

Thu, Oct 29 - Sun, Nov 8

6:00 am - 11:06 amLEX Lexington Blue Grass-ONT Ontario

8h 06m1 stop Atlanta Hartsfield-Jackson

12:16 pm - 10:53 pmONT Ontario-LEX Lexington Blue Grass

7h 37m1 stop Atlanta Hartsfield-Jackson

$514Delta

Fri, Oct 30 - Sat, Nov 7

6:00 am - 9:35 amSDF Louisville Intl-ONT Ontario

6h 35m1 stop Dallas/Fort Worth

2:22 pm - 11:34 pmONT Ontario-SDF Louisville Intl

6h 12m1 stop Dallas/Fort Worth

$590American Airlines

Thu, Oct 29 - Tue, Nov 10

9:00 am - 12:33 pmLEX Lexington Blue Grass-ONT Ontario

6h 33m1 stop Denver Intl

1:29 pm - 10:36 pmONT Ontario-LEX Lexington Blue Grass

6h 07m1 stop Denver Intl

$605United Airlines

Tue, Oct 27 - Sat, Oct 31

1:50 pm - 8:51 pmLEX Lexington Blue Grass-ONT Ontario

10h 01m2 stops Chicago O'Hare Intl Denver Intl

1:29 pm - 10:36 pmONT Ontario-LEX Lexington Blue Grass

6h 07m1 stop Denver Intl

$610United Airlines

Tue, Oct 27 - Sat, Oct 31

8:02 am - 1:30 pmSDF Louisville Intl-ONT Ontario

8h 28m1 stop Dallas/Fort Worth

6:00 am - 3:27 pmONT Ontario-SDF Louisville Intl

6h 27m1 stop Dallas/Fort Worth

$621American Airlines

Wed, Oct 28 - Sat, Oct 31

3:36 pm - 10:59 pmSDF Louisville Intl-ONT Ontario

10h 23m1 stop Charlotte Douglas

9:41 am - 11:27 pmONT Ontario-SDF Louisville Intl

10h 46m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

$626American Airlines

Wed, Oct 28 - Sat, Oct 31

10:27 am - 10:48 pmSDF Louisville Intl-ONT Ontario

15h 21m2 stops Chicago O'Hare Intl San Francisco

5:00 am - 2:22 pmONT Ontario-SDF Louisville Intl

6h 22m1 stop Denver Intl

$654United Airlines

Thu, Oct 29 - Wed, Nov 11

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Southwest flights from Kentucky to Ontario

Our best Southwest deals on Kentucky to Ontario flight tickets

Southwest

Nov 11

SDF6:50 amLouisville Intl

6h 20m

1 stop

ONT10:10 amOntario

Nov 15

ONT11:55 pmOntario

7h 35m

1 stop

SDF10:30 amLouisville Intl

$291

Southwest

Jan 28

SDF11:30 amLouisville Intl

8h 30m

1 stop

ONT5:00 pmOntario

Feb 11

ONT5:00 amOntario

8h 15m

1 stop

SDF4:15 pmLouisville Intl

$296

Southwest

Jan 28

SDF6:40 amLouisville Intl

6h 30m

1 stop

ONT10:10 amOntario

Feb 11

ONT1:05 pmOntario

8h 50m

1 stop

SDF12:55 amLouisville Intl

$301

Delta flights from Kentucky to Ontario

Our best Delta deals on Kentucky to Ontario flight tickets

Delta

Nov 9

SDF3:00 pmLouisville Intl

9h 57m

1 stop

ONT9:57 pmOntario

Nov 26

ONT7:05 amOntario

6h 49m

1 stop

SDF4:54 pmLouisville Intl

$329

Delta

Nov 26

SDF1:01 pmLouisville Intl

9h 48m

1 stop

ONT7:49 pmOntario

Nov 30

ONT11:10 pmOntario

6h 58m

1 stop

SDF9:08 amLouisville Intl

$335

Delta

Nov 9

SDF5:59 pmLouisville Intl

6h 58m

1 stop

ONT9:57 pmOntario

Nov 16

ONT11:10 pmOntario

6h 56m

1 stop

SDF9:06 amLouisville Intl

$359

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Thu 11/12

6:10 pm-11:01 pm

1 stop7h 51m

Ontario

Mon 11/23

2:09 pm-12:15 am

1 stop7h 06m

$279

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Thu 11/26

1:01 pm-7:49 pm

1 stop9h 48m

Ontario

Tue 12/1

12:20 pm-9:51 pm

1 stop6h 31m

$279

Quickest round-trip

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Wed 11/11

6:50 am-10:10 am

1 stop6h 20m

Ontario

Sun 11/15

11:55 pm-10:30 am

1 stop7h 35m

$291

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Thu 1/28

11:30 am-5:00 pm

1 stop8h 30m

Ontario

Thu 2/11

5:00 am-4:15 pm

1 stop8h 15m

$296

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Thu 11/12

7:00 am-3:33 pm

2 stops11h 33m

Ontario

Mon 11/23

5:00 am-2:22 pm

1 stop6h 22m

$318

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Sat 11/14

6:00 am-11:03 am

1 stop8h 03m

Ontario

Thu 11/26

7:05 am-7:14 pm

1 stop9h 09m

$329

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Mon 11/9

3:00 pm-9:57 pm

1 stop9h 57m

Ontario

Thu 11/26

7:05 am-4:54 pm

1 stop6h 49m

$329

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Thu 1/14

9:45 am-6:16 pm

2 stops11h 31m

Ontario

Tue 1/19

6:26 am-5:22 pm

1 stop7h 56m

$338

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Wed 11/11

10:37 am-6:01 pm

2 stops10h 24m

Ontario

Sun 11/15

5:00 am-2:22 pm

1 stop6h 22m

$341

LouisvilleOntario

SDF Louisville Intl - ONT Ontario

SDFONT

Louisville Intl

Thu 1/14

9:45 am-6:16 pm

2 stops11h 31m

Ontario

Tue 1/19

9:28 am-11:12 pm

2 stops10h 44m

$343

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, March 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 $359. If you aren’t able to travel during the month of March, then book flights to Ontario from Kentucky during February instead. Flights to Ontario in February, while not as cheap as those in March, still average around $398.

Cheap Kentucky to Ontario flight deals and tips

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

Best Price Found	$140
Fastest flight time	4h 15m
Direct flights	None

The best one-way flight to Ontario from Kentucky in the past 72 hours is $140. The best round-trip flight deal from Kentucky to Ontario found on momondo in the last 72 hours is $279.

The fastest flight from Kentucky to Ontario takes 4h 15m

There are no direct flights from Kentucky to Ontario. There are no popular flight routes from Kentucky to Ontario.

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 October 2026, there are 4 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
Delta	PriceFrom $323	Free Cancellation	Rating 7.8 8,676 reviews	Search Delta flights
American Airlines	PriceFrom $324	Free Cancellation	Rating 7.0 12,193 reviews	Search American Airlines flights
United Airlines	PriceFrom $337	Free Cancellation	Rating 7.3 10,424 reviews	Search United Airlines flights
Southwest	PriceFrom $370	Free Cancellation	Rating 7.9 4,220 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.

An easier way to manage your Ontario trip

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Cheap flights from Kentucky to Los Angeles from $140

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 1/12. 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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Southwest flights from Kentucky to Ontario

Our best Southwest deals on Kentucky to Ontario flight tickets

Delta flights from Kentucky to Ontario

Our best Delta 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?

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

What airlines fly to Ontario?

How long does it take to fly to Ontario?

Cheap Kentucky to Ontario flight deals and tips

Best Price Found

Fastest flight time

Direct flights

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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Fly your favorite airline to Los Angeles

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

Cabin classes currently available on flights to Los Angeles

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

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