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Ontario

$87+ Cheap flights from Kentucky to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from Kentucky to Ontario

Keep the following information in mind while searching for Kentucky to Ontario flight deals. Data was last updated April 17, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$191
(CheapOair)

One-way from

$87
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$416
Provider with most accurate pricing for Louisville Intl-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Los Angeles flights.
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From Kentucky to Ontario
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One-way flight from Kentucky to Ontario
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Highest demand for flights based on searches. 22% potential increase in price ($101 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Kentucky to Ontario

Cheapest flights from Kentucky to Ontario
Explore the most affordable flight options available from Kentucky to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This Frontier deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:39 pmCVG - ONT
1 stop9h 20mFrontier
Sun 4/272:42 pmONT - CVG
1 stop12h 04mFrontier
Deal found 4/16$188
This CheapOair deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/297:18 pmBNA - ONT
1 stop6h 33mFrontier
Fri 5/3012:59 amONT - BNA
1 stop12h 40mFrontier
Deal found 4/17$191
This Flightnetwork deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/225:30 pmTYS - ONT
1 stop9h 21mFrontier
Wed 5/285:21 pmONT - TYS
1 stop20h 14mFrontier
Deal found 4/17$229
This Alaska Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/24:19 pmBNA - ONT
1 stop9h 40mAlaska Airlines
Mon 8/116:58 pmONT - BNA
1 stop8h 42mAlaska Airlines
Deal found 4/15$256
This Hawaiian Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/185:27 pmBNA - ONT
1 stop8h 32mHawaiian Airlines
Mon 9/2211:39 amONT - BNA
1 stop10h 20mHawaiian Airlines
Deal found 4/16$288
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/94:22 pmTYS - ONT
1 stop9h 07mDelta
Mon 5/1210:00 pmONT - TYS
1 stop8h 40mDelta
Deal found 4/17$289
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/175:15 amBNA - ONT
1 stop7h 23mDelta
Mon 6/3010:05 pmONT - BNA
1 stop8h 32mDelta
Deal found 4/16$289
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/93:44 pmLEX - ONT
1 stop6h 49mDelta
Sun 5/117:05 amONT - LEX
1 stop9h 06mDelta
Deal found 4/16$289
This American Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/96:28 pmTYS - ONT
1 stop8h 15mAmerican Airlines
Mon 5/127:25 pmONT - TYS
2 stops9h 59mAmerican Airlines
Deal found 4/17$294
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/285:45 pmCVG - ONT
1 stop8h 57mDelta
Tue 6/36:00 amONT - CVG
1 stop9h 41mDelta
Deal found 4/16$313
This American Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1311:08 amBNA - ONT
2 stops9h 15mAmerican Airlines
Tue 5/202:44 pmONT - BNA
1 stop7h 10mAmerican Airlines
Deal found 4/15$324
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/37:05 amSDF - ONT
1 stop7h 03mDelta
Sat 6/712:18 pmONT - SDF
1 stop8h 47mDelta
Deal found 4/17$327

Cheapflights Fare Finder

Customize your flight search to find flights from Kentucky to Ontario 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, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
Use the filters below to find and compare flights from Kentucky to Ontario that are best for you.

Fly from

Kentucky

Fly to

Ontario

Route

Depart

Return

Price

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 4/26

5:39 pm-11:59 pm

1 stop9h 20m

Ontario

Sun 4/27

2:42 pm-5:46 am

1 stop12h 04m

$188

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 5/29

7:18 pm-11:51 pm

1 stop6h 33m

Ontario

Fri 5/30

12:59 am-3:39 pm

1 stop12h 40m

$191

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 5/22

5:30 pm-11:51 pm

1 stop9h 21m

Ontario

Wed 5/28

5:21 pm-4:35 pm

1 stop20h 14m

$229

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Fri 5/9

4:22 pm-10:29 pm

1 stop9h 07m

Ontario

Mon 5/12

10:00 pm-9:40 am

1 stop8h 40m

$289

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 6/17

5:15 am-10:38 am

1 stop7h 23m

Ontario

Sat 7/5

6:00 am-1:52 pm

1 stop5h 52m

$289

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Fri 5/9

3:44 pm-7:33 pm

1 stop6h 49m

Ontario

Sun 5/11

7:05 am-7:11 pm

1 stop9h 06m

$289

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Fri 5/9

6:28 pm-11:43 pm

1 stop8h 15m

Ontario

Mon 5/12

7:25 pm-8:24 am

2 stops9h 59m

$294

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 5/9

7:10 am-3:32 pm

1 stop10h 22m

Ontario

Fri 5/16

4:45 pm-5:40 am

1 stop10h 55m

$306

CincinnatiOntario

CVG - ONT

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 5/28

5:45 pm-11:42 pm

1 stop8h 57m

Ontario

Tue 6/3

6:00 am-6:41 pm

1 stop9h 41m

$313

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 5/13

11:08 am-6:23 pm

2 stops9h 15m

Ontario

Tue 5/20

2:44 pm-11:54 pm

1 stop7h 10m

$324

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 60 results
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Best time to book a flight from Kentucky to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Kentucky with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Kentucky to Ontario

What is the cheapest month to book a flight from Kentucky to Ontario?

Currently, August is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $246). Flying from Kentucky to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from KY to ONT?

Find hourly flight availability from Kentucky to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Kentucky to Ontario as you normally would.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated April 17, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Kentucky to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,887 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,916 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,380 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Boarding

8.1

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from Kentucky to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Kentucky?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Kentucky to Ontario.

  • What are the cheapest airlines to fly from Kentucky to Ontario one-way?

    $87 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from $140 and $144, respectively.

  • What are the most popular routes from Kentucky to Ontario?

    While some choose either Cincinnati Cinci./N. Kentucky - Ontario or Louisville Intl - Ontario, Nashville Intl - Ontario is the most popular route from Kentucky to Ontario.

  • Can I find deals for flights from Kentucky to Ontario that include hotel bookings?

    Yes. In addition to deals on Kentucky to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Kentucky to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kentucky to Ontario.

  • Can I find deals for business class flights from Kentucky to Ontario?

    Yes. Cheapflights offers flight deals from Kentucky to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Kentucky to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Kentucky to Ontario (average of $246). Flying from Kentucky to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Kentucky to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Kentucky to Ontario

Discover the top 4 airlines that operate flights from Kentucky to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$257Average$506FlexibilityNo cancel feeOn-time69%
DeltaCheapest$288Average$416FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$306Average$468FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$364Average$506FlexibilityNo cancel feeOn-time63%

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