$91 Find Cheap Flights from Ontario to Kentucky

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Kentucky departing on 5/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Kentucky

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Kentucky, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Kentucky, as well as popular online travel agencies
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Flights Deals

Best Kentucky Flight Deals from Ontario

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Louisville
Louisville1 stop$307
Lexington
Lexington1 stop$283
Nashville
Nashville1 stop$228
Louisville
Louisville1 stop$307
Lexington
Lexington1 stop$283
Nashville
Nashville1 stop$228

Cheap Flight Deals from Ontario to Kentucky (ONT-USKY)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Kentucky that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Ontario to Kentucky

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Ontario to Kentucky.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
5:21 pm - 12:55 amONT-CVG
28h 34m1 stop
Frontier Logo
3:46 pm - 12:20 pmCVG-ONT
23h 34m1 stop
$211Frontier
Find Deal
Wed, May 28 - Sun, Jun 1
Frontier Logo
5:26 pm - 12:57 amONT-CVG
28h 31m1 stop
Frontier Logo
3:46 pm - 8:51 pmCVG-ONT
8h 05m1 stop
$214Frontier
Find Deal
Thu, May 29 - Mon, Jun 2
Delta Logo
10:05 pm - 9:43 amONT-TYS
8h 38m1 stop
Delta Logo
5:45 am - 10:20 amTYS-ONT
7h 35m1 stop
$283Delta
Find Deal
Sun, Jun 29 - Fri, Jul 4
Delta Logo
10:59 pm - 10:26 amONT-LEX
8h 27m1 stop
Delta Logo
1:30 pm - 7:29 pmLEX-ONT
8h 59m1 stop
$283Delta
Find Deal
Fri, Aug 29 - Sun, Aug 31
American Airlines Logo
6:15 am - 7:14 pmONT-TYS
9h 59m2 stops
American Airlines Logo
4:10 pm - 9:57 pmTYS-ONT
8h 47m2 stops
$299American Airlines
Find Deal
Wed, May 28 - Wed, Jun 4
American Airlines Logo
6:17 am - 6:28 pmONT-LEX
9h 11m2 stops
American Airlines Logo
5:44 am - 12:10 pmLEX-ONT
9h 26m2 stops
$299American Airlines
Find Deal
Tue, Aug 19 - Sat, Aug 23
United Airlines Logo
6:00 am - 2:04 pmONT-BNA
6h 04m1 stop
United Airlines Logo
6:40 am - 12:14 pmBNA-ONT
7h 34m1 stop
$323United Airlines
Find Deal
Sun, Jun 15 - Wed, Jun 18
United Airlines Logo
6:48 pm - 10:27 amONT-CVG
12h 39m2 stops
United Airlines Logo
4:54 pm - 10:00 pmCVG-ONT
8h 06m1 stop
$362United Airlines
Find Deal
Wed, May 14 - Sat, May 17
Southwest Logo
5:00 am - 5:05 pmONT-CVG
9h 05m2 stops
Southwest Logo
3:30 pm - 10:40 pmCVG-ONT
10h 10m2 stops
$370Southwest
Find Deal
Mon, Jul 28 - Wed, Jul 30
Southwest Logo
8:35 pm - 5:00 amONT-BNA
6h 25m1 stop
Southwest Logo
4:15 pm - 6:25 pmBNA-ONT
4h 10mnonstop
$386Southwest
Find Deal
Thu, Aug 28 - Tue, Sep 2
Useful Info

KAYAK's insights & trends for Ontario to Kentucky flights

Get data-powered insights and trends into flights from Ontario to Kentucky to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to Kentucky?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Kentucky, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Kentucky is February, when tickets cost $371 (return) on average. On the other hand, the most expensive months are March and December, when the average cost of round-trip tickets is $556 and $556 respectively.

What’s the cheapest day of the week to fly from Ontario to Kentucky?

The average price of all round-trip flights from Ontario to Kentucky clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Kentucky on a Saturday and more expensive on a Monday. On your return trip to Ontario, you should consider flying back on a Thursday, and avoid Tuesdays for better deals.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$91
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Ontario to Nashville

FAQs - booking Kentucky flights

  • How does KAYAK find such low prices on flights from Ontario to Kentucky?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Kentucky.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Kentucky?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Kentucky is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Kentucky?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Kentucky with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Kentucky?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Kentucky up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Kentucky?

    The cheapest time of day to fly to Kentucky is generally at night, when round-trip flights cost $492 on average. Morning departures are around 8% cheaper than evening flights, on average. The most expensive time of day to fly to Kentucky is generally in the evening, which is peak travel time and where the average cost of a ticket is $536.

Top 4 airlines serving from Ontario to Kentucky

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Kentucky. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Kentucky? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4294 reviews
8.0Comfort
8.2Boarding
7.6Entertainment
8.6Crew
7.1Food
Airline reviews

The seats were a bit cramped and worn, but otherwise okay.

6.0 GoodDonald, Apr 2025BWI - SDF
Read more Southwest reviews

The seats were a bit cramped and worn, but otherwise okay.

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

My seat was changed at the last minute and I was moved to the last row, right next to the bathroom despite selecting my seat well in advance. I was also made to check my carry on due to space but when I got on the plane there was significant empty overhead space. Picking up my carry on from the luggage carousel added time to my trip which had already been extended due to delay.

The gate was too far away for the connecting flight

Compared with other carriers business class for an overnight was not worth the extra expense.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

Plane left & arrived early- 5 Crew great. Wi fi - paid for 2, only 1 worked - so so. Waste of $. Coolie was good

There was no USB plug in my section of the plane. So I could not charge my phone. Also, there was no screen to watch movie or anything like that. Wish I had known that in advance, I would’ve brought my iPad.

Made all groups except 2 check despite ample bin space. Inflight WiFi and entertainment didn’t work most of the time.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Everything was fine. Flight boarded and departed on time. Seating was spacious enough for my carryon to fit under the seat in front of me. No complaints at all. Flight even arrived early.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

I paid for what I got which was cheap, I brought my own entertainment. I knew what to expect, so I could be prepared. If you’re flying economy, check in early like me. I have no problems with my flight, was on time, staff were friendly, and overall good experience.

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

Information on your arrival and departure airports

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