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$89+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ONT
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$234
(Trip.com)

One-way from

$89
(Trip.com)

Popular in

December

Cheapest in

May

Average price

$459
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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. 23% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Trip.com deal was found by Cheapflights users on 3/31. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:39 pmCVG - ONT
1 stop9h 20mFrontier
Mon 5/512:26 pmONT - CVG
1 stop8h 57mFrontier
Deal found 3/31$234
This CheapOair deal was found by Cheapflights users on 3/30. 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 5/17:45 pmBNA - ONT
1 stop17h 41mFrontier
Wed 5/712:08 amONT - BNA
1 stop16h 44mFrontier
Deal found 3/30$240
This Frontier deal was found by Cheapflights users on 3/30. 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.
Thu 4/174:31 pmTYS - ONT
1 stop10h 28mFrontier
Sat 4/1912:59 amONT - TYS
1 stop11h 47mFrontier
Deal found 3/30$248
This Alaska Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 5/67:10 amBNA - ONT
1 stop10h 22mAlaska Airlines
Thu 5/86:24 pmONT - BNA
1 stop9h 26mAlaska Airlines
Deal found 3/30$256
This Trip.com deal was found by Cheapflights users on 3/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/97:10 amBNA - ONT
1 stop10h 22mHawaiian Airlines
Fri 5/167:20 pmONT - BNA
1 stop8h 20mHawaiian Airlines
Deal found 3/30$262
This Gotogate deal was found by Cheapflights users on 3/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/97:10 amBNA - ONT
1 stop10h 22mMultiple Airlines
Thu 5/1512:59 amONT - BNA
1 stop15h 53mMultiple Airlines
Deal found 3/30$277
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Thu 4/245:24 amTYS - ONT
1 stop7h 30mAmerican Airlines
Sat 4/262:44 pmONT - TYS
1 stop6h 11mAmerican Airlines
Deal found 3/30$289
This Delta deal was found by Cheapflights users on 3/30. 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 7/157:16 pmBNA - ONT
1 stop6h 27mDelta
Fri 7/251:00 pmONT - BNA
1 stop7h 22mDelta
Deal found 3/30$289
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/810:15 amBNA - ONT
2 stops12h 19mUnited Airlines
Tue 5/131:20 pmONT - BNA
1 stop6h 13mUnited Airlines
Deal found 3/30$294
This Delta deal was found by Cheapflights users on 3/30. 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 4/3012:55 pmTYS - ONT
2 stops13h 46mDelta
Sat 5/310:15 pmONT - TYS
2 stops10h 48mDelta
Deal found 3/30$299
This Delta deal was found by Cheapflights users on 3/30. 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 8/133:45 pmLEX - ONT
1 stop9h 44mDelta
Mon 8/1812:00 pmONT - LEX
1 stop8h 56mDelta
Deal found 3/30$309
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Mon 7/217:06 pmBNA - ONT
1 stop5h 52mAmerican Airlines
Mon 7/2811:59 pmONT - BNA
1 stop6h 05mAmerican Airlines
Deal found 3/31$339

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 March 31, 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

Fri 5/2

6:30 am-1:35 pm

1 stop10h 05m

Ontario

Sun 5/4

2:28 pm-5:00 am

1 stop11h 32m

$238

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 5/1

7:45 pm-11:26 am

1 stop17h 41m

Ontario

Wed 5/7

12:08 am-6:52 pm

1 stop16h 44m

$240

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 4/17

4:31 pm-11:59 pm

1 stop10h 28m

Ontario

Sat 4/19

12:59 am-3:46 pm

1 stop11h 47m

$248

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 5/6

7:10 am-3:32 pm

1 stop10h 22m

Ontario

Thu 5/8

6:24 pm-5:50 am

1 stop9h 26m

$256

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 5/9

7:10 am-3:32 pm

1 stop10h 22m

Ontario

Fri 5/16

7:20 pm-5:40 am

1 stop8h 20m

$262

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 5/1

7:45 pm-11:59 pm

1 stop6h 14m

Ontario

Thu 5/8

11:46 am-12:12 am

1 stop10h 26m

$268

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 4/24

5:24 am-9:54 am

1 stop7h 30m

Ontario

Sat 4/26

2:44 pm-11:55 pm

1 stop6h 11m

$289

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 5/8

10:15 am-8:34 pm

2 stops12h 19m

Ontario

Tue 5/13

1:20 pm-9:33 pm

1 stop6h 13m

$294

LexingtonOntario

LEX - ONT

LEXONT

Lexington Blue Grass

Sat 4/26

2:12 pm-6:29 pm

1 stop7h 17m

Ontario

Mon 4/28

7:25 pm-10:36 am

2 stops12h 11m

$294

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Wed 4/30

12:55 pm-11:41 pm

2 stops13h 46m

Ontario

Sat 5/3

10:15 pm-12:03 pm

2 stops10h 48m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 58 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 $326). 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 March 31, 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 March 31, 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
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Hawaiian Airlines
7.9
Good
2,342 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

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?

    $89 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Alaska Airlines, with prices starting from $115 and $128, respectively.

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

    While some choose either Cincinnati Cinci./N. Kentucky - Ontario or Lexington Blue Grass - 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 $326). 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$257Average$517FlexibilityNo cancel feeOn-time69%
DeltaCheapest$276Average$418FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$326Average$467FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$364Average$506FlexibilityNo cancel feeOn-time63%
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