ONT - LEX

$289 Find Cheap Flights from Ontario to Lexington

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 Lexington departing on 1/19. 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
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Lexington, 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 Lexington, as well as popular online travel agencies
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$309
Overall average: $331
Delta
Thu 1/22Sat 1/31
ONT - LEX • 1 stop
Cheapest one-way
$289
Typical prices: $303-$393
Delta
Mon 1/19
ONT - LEX • 1 stop
Top airlines
Delta
Cheapest • from $309 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
August
Cheapest • 29% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Lexington!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Lexington (ONT-LEX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Lexington 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Lexington

Thu, Jan 22 - Sat, Jan 31
Delta Logo
10:30 pm - 9:42 am
ONT
-
LEX
8h 12m1 stop
Delta Logo
6:00 am - 11:31 am
LEX
-
ONT
8h 31m1 stop
$309Delta
Thu, Jan 22 - Sat, Jan 31
Delta Logo
10:30 pm - 9:42 am
ONT
-
LEX
8h 12m1 stop
Delta Logo
10:37 am - 9:05 pm
LEX
-
ONT
13h 28m2 stops
$314Delta
Thu, Jan 22 - Sat, Jan 31
United Airlines Logo
5:05 am - 8:31 pm
ONT
-
LEX
12h 26m2 stops
United Airlines Logo
2:00 pm - 8:58 pm
LEX
-
ONT
9h 58m2 stops
$319United Airlines
Fri, Feb 13 - Sat, Feb 14
Delta Logo
10:20 pm - 9:29 am
ONT
-
LEX
8h 09m1 stop
Delta Logo
5:00 pm - 9:05 pm
LEX
-
ONT
7h 05m1 stop
$364Delta
Thu, Jan 8 - Thu, Jan 15
United Airlines Logo
6:00 am - 10:40 pm
ONT
-
LEX
13h 40m2 stops
United Airlines Logo
10:30 am - 10:53 pm
LEX
-
ONT
15h 23m2 stops
$393United Airlines
Mon, Jan 12 - Mon, Jan 19
Delta Logo
10:30 pm - 10:27 am
ONT
-
LEX
8h 57m1 stop
Delta Logo
4:38 pm - 9:05 pm
LEX
-
ONT
7h 27m1 stop
$394Delta
Thu, Jan 8 - Thu, Jan 15
United Airlines Logo
6:39 pm - 4:48 pm
ONT
-
LEX
19h 09m3 stops
United Airlines Logo
10:30 am - 10:53 pm
LEX
-
ONT
15h 23m2 stops
$398United Airlines
Wed, Jan 21 - Sat, Jan 24
United Airlines Logo
1:24 pm - 10:30 pm
ONT
-
LEX
6h 06m1 stop
United Airlines Logo
9:00 am - 12:47 pm
LEX
-
ONT
6h 47m1 stop
$399United Airlines
Wed, Feb 4 - Sat, Feb 7
United Airlines Logo
1:24 pm - 10:30 pm
ONT
-
LEX
6h 06m1 stop
United Airlines Logo
2:00 pm - 10:53 pm
LEX
-
ONT
11h 53m2 stops
$404United Airlines
Wed, Jan 21 - Sat, Jan 24
United Airlines Logo
5:05 am - 5:13 pm
ONT
-
LEX
9h 08m2 stops
United Airlines Logo
2:00 pm - 8:58 pm
LEX
-
ONT
9h 58m2 stops
$409United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Lexington flights

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

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

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

When flying from Ontario to Lexington, you should consider leaving on a Wednesday and avoid Mondays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Saturdays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Lexington, 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 Lexington is August, where tickets cost $288 (return) on average. On the other hand, the most expensive months are May and November, where the average cost of round-trip tickets is $563 and $550 respectively.

Good to know

Low seasonNovember
Cheapest flight$289
Best time to beat the crowds but there is an average 36% increase in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Ontario to Lexington

When to book flights from Ontario to Lexington

Are your dates flexible? Find out the best times to travel from Ontario to Lexington based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Lexington

  • What is the cheapest flight from Ontario to Lexington?

    In the last 3 days, the lowest price for a flight from Ontario to Lexington was $289 for a one-way ticket and $309 for a round-trip.

  • Do I need a passport to fly between Ontario and Lexington?

    No

  • Which aircraft models fly most regularly from Ontario to Lexington?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Lexington?

    oneworld, and SkyTeam are the airline alliances operating flights between Ontario and Lexington, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Lexington, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Lexington are Delta and American Airlines. With an average price for the route of $373 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $441 and an overall rating of 7.2.

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

    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 Lexington.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Lexington from Ontario 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 Lexington?

    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 to Lexington with an airline and back to Ontario with another airline. Booking your flights between Ontario and LEX can sometimes prove cheaper using this method.

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

    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 to Lexington from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ontario to Lexington

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Lexington. 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 Lexington? 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.
7.9
DeltaOverall score based on 8005 reviews
8.5Crew
7.9Entertainment
8.1Boarding
7.3Food
7.9Comfort
Airline reviews

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

10.0 ExcellentVenkata Krishna, Dec 2025
ATL - SDF
Read more Delta reviews

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

The flight was flawless and we even arrived between 20 and 25 minutes early!

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

The entertainment package was vast and the selections were very current. Keep updating it was great.

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

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

Information on your arrival and departure airports