ONT - LEX

$126 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 5/7. 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
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Everything you should know

Cheapest round-trip
$309
Overall average: $403
Delta
Fri 2/27Sat 3/7
ONT - LEX • 1 stop
Cheapest one-way
$126
Multiple Airlines
Thu 5/7
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 • 32% 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

Fri, Feb 27 - Sat, Mar 7
Delta Logo
10:20 pm - 9:20 am
ONT
-
LEX
8h 00m
1 stop
Delta Logo
5:00 pm - 9:05 pm
LEX
-
ONT
7h 05m
1 stop
$309Delta
Wed, Feb 18 - Wed, Mar 11
American Airlines Logo
10:37 pm - 10:51 am
ONT
-
LEX
9h 14m
1 stop
American Airlines Logo
7:00 am - 1:48 pm
LEX
-
ONT
9h 48m
1 stop
$334American Airlines
Mon, Feb 16 - Mon, Mar 9
Delta Logo
10:20 pm - 9:20 am
ONT
-
LEX
8h 00m
1 stop
Delta Logo
5:49 pm - 11:51 pm
LEX
-
ONT
9h 02m
2 stops
$339Delta
Mon, Feb 16 - Mon, Mar 9
Delta Logo
5:00 pm - 9:20 am
ONT
-
LEX
13h 20m
2 stops
Delta Logo
5:49 pm - 11:51 pm
LEX
-
ONT
9h 02m
2 stops
$344Delta
Wed, Feb 18 - Wed, Mar 11
Delta Logo
5:00 pm - 9:20 am
ONT
-
LEX
13h 20m
2 stops
Delta Logo
10:30 am - 9:00 pm
LEX
-
ONT
13h 30m
2 stops
$345Delta
Wed, Apr 15 - Sat, Apr 18
Delta Logo
12:49 pm - 11:54 pm
ONT
-
LEX
8h 05m
1 stop
Delta Logo
2:19 pm - 9:00 pm
LEX
-
ONT
9h 41m
1 stop
$359Delta
Wed, Apr 15 - Fri, Apr 24
Delta Logo
12:49 pm - 11:54 pm
ONT
-
LEX
8h 05m
1 stop
Delta Logo
12:44 pm - 6:33 pm
LEX
-
ONT
8h 49m
1 stop
$389Delta
Sat, Feb 14 - Wed, Feb 18
United Airlines Logo
5:00 am - 4:50 pm
ONT
-
LEX
8h 50m
2 stops
United Airlines Logo
10:35 am - 8:50 pm
LEX
-
ONT
13h 15m
2 stops
$390United Airlines
Sat, Feb 14 - Wed, Feb 18
Delta Logo
10:20 pm - 9:20 am
ONT
-
LEX
8h 00m
1 stop
Delta Logo
7:26 am - 4:02 pm
LEX
-
ONT
11h 36m
2 stops
$394Delta
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
1:34 pm - 10:45 pm
ONT
-
LEX
6h 11m
1 stop
United Airlines Logo
5:45 pm - 10:26 pm
LEX
-
ONT
7h 41m
1 stop
$399United 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 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 January and May, where the average cost of round-trip tickets is $599 and $563 respectively.

Good to know

Low seasonJanuary
Cheapest flight$126
Best time to beat the crowds but there is an average 41% increase in price.
Most popular time to fly and prices are also 12% 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 $126 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 $374 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 8130 reviews
7.8Entertainment
8.1Boarding
8.5Crew
7.2Food
7.9Comfort
Airline reviews

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

10.0 ExcellentDr. Simon, Jan 2026
LAX - JFK
Read more Delta reviews

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

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.

It would be nice to have some low carb options in the snacks.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

The flight was on time and arrived early. The crew were friendly and helpful.

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

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.

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

Information on your arrival and departure airports