What is the cheapest airline that flies from Ontario to Lexington Blue Grass?

United Airlines is the most popular carrier operating from Ontario to Lexington Blue Grass

What airlines fly to Lexington?

American Airlines, Delta and Southwest are the top three most popular airlines that fly to Lexington from Ontario according to our data. American Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Lexington. Keep in mind that there are 8 different airlines that fly to Lexington on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Lexington Blue Grass Airport?

Prices for flights from Ontario Airport to Lexington Blue Grass Airport are updated daily.

How many operators does momondo search for flights from Ontario Airport to Lexington Blue Grass Airport?

As of August 2026, there are 3 operators available to choose from for flights from Ontario Airport to Lexington Blue Grass Airport.

How old do you have to be to fly from Ontario Airport to Lexington Blue Grass Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Lexington Blue Grass Airport.

What documentation or ID do you need to fly to Lexington Blue Grass Airport?

The necessary travel and health documents for your Lexington Blue Grass Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$317 Cheap Flights from Ontario to Lexington in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Lexington

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:17 pm - 11:54 pmONT Ontario-LEX Lexington Blue Grass

8h 37m1 stop Atlanta Hartsfield-Jackson

7:00 am - 11:05 amLEX Lexington Blue Grass-ONT Ontario

7h 05m1 stop Atlanta Hartsfield-Jackson

$341Delta

Sat, Sep 12 - Sat, Sep 19

12:17 pm - 11:59 pmONT Ontario-LEX Lexington Blue Grass

8h 42m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:05 amLEX Lexington Blue Grass-ONT Ontario

8h 05m1 stop Atlanta Hartsfield-Jackson

$350Delta

Tue, Sep 15 - Sat, Sep 19

10:00 pm - 9:22 amONT Ontario-LEX Lexington Blue Grass

8h 22m1 stop Atlanta Hartsfield-Jackson

6:00 am - 11:05 amLEX Lexington Blue Grass-ONT Ontario

8h 05m1 stop Atlanta Hartsfield-Jackson

$350Delta

Mon, Sep 14 - Sat, Sep 19

12:37 pm - 11:21 pmONT Ontario-LEX Lexington Blue Grass

7h 44m1 stop Dallas/Fort Worth

6:00 am - 9:29 amLEX Lexington Blue Grass-ONT Ontario

6h 29m1 stop Dallas/Fort Worth

$441American Airlines

Wed, Sep 9 - Sat, Sep 12

1:18 pm - 10:38 pmONT Ontario-LEX Lexington Blue Grass

6h 20m1 stop Denver Intl

5:57 pm - 10:59 pmLEX Lexington Blue Grass-ONT Ontario

8h 02m1 stop Chicago O'Hare Intl

$441United Airlines

Fri, Sep 11 - Sat, Sep 19

1:24 pm - 10:09 pmONT Ontario-LEX Lexington Blue Grass

5h 45m1 stop Denver Intl

6:10 pm - 10:49 pmLEX Lexington Blue Grass-ONT Ontario

7h 39m1 stop Chicago O'Hare Intl

$441United Airlines

Wed, Sep 30 - Sat, Oct 3

7:05 am - 7:37 pmONT Ontario-LEX Lexington Blue Grass

9h 32m1 stop Dallas/Fort Worth

5:43 pm - 10:37 pmLEX Lexington Blue Grass-ONT Ontario

7h 54m1 stop Dallas/Fort Worth

$443American Airlines

Sun, Sep 6 - Tue, Sep 15

9:01 am - 12:05 amONT Ontario-LEX Lexington Blue Grass

12h 04m2 stops San Francisco Chicago O'Hare Intl

5:57 pm - 10:59 pmLEX Lexington Blue Grass-ONT Ontario

8h 02m1 stop Chicago O'Hare Intl

$446United Airlines

Wed, Sep 9 - Sat, Sep 12

6:02 am - 12:09 amONT Ontario-LEX Lexington Blue Grass

15h 07m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

5:29 am - 6:00 pmLEX Lexington Blue Grass-ONT Ontario

15h 31m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$603Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

7:59 pm - 10:42 amONT Ontario-LEX Lexington Blue Grass

11h 43m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

11:22 am - 7:03 pmLEX Lexington Blue Grass-ONT Ontario

10h 41m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$683Alaska Airlines

Fri, Sep 25 - Tue, Sep 29

Cheap last minute flights

Enter your travel dates to find the best prices.

12:00 pm - 11:59 pmONT Ontario-LEX Lexington Blue Grass

8h 59m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:42 amLEX Lexington Blue Grass-ONT Ontario

7h 42m1 stop Atlanta Hartsfield-Jackson

$437Delta

Tue, Aug 25 - Tue, Sep 1

12:00 pm - 11:59 pmONT Ontario-LEX Lexington Blue Grass

8h 59m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:42 amLEX Lexington Blue Grass-ONT Ontario

7h 42m1 stop Atlanta Hartsfield-Jackson

$482Delta

Tue, Aug 25 - Mon, Aug 31

12:00 pm - 11:59 pmONT Ontario-LEX Lexington Blue Grass

8h 59m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:42 amLEX Lexington Blue Grass-ONT Ontario

7h 42m1 stop Atlanta Hartsfield-Jackson

$482Delta

Tue, Aug 25 - Sun, Aug 30

12:00 pm - 10:46 pmONT Ontario-LEX Lexington Blue Grass

7h 46m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:42 amLEX Lexington Blue Grass-ONT Ontario

7h 42m1 stop Atlanta Hartsfield-Jackson

$482Delta

Sat, Aug 22 - Mon, Aug 24

6:08 am - 8:28 pmONT Ontario-LEX Lexington Blue Grass

11h 20m2 stops San Francisco Chicago O'Hare Intl

6:15 pm - 10:35 pmLEX Lexington Blue Grass-ONT Ontario

7h 20m1 stop Chicago O'Hare Intl

$542United Airlines

Tue, Aug 25 - Tue, Sep 1

12:33 pm - 11:19 pmONT Ontario-LEX Lexington Blue Grass

7h 46m1 stop Dallas/Fort Worth

6:00 am - 9:34 amLEX Lexington Blue Grass-ONT Ontario

6h 34m1 stop Dallas/Fort Worth

$545American Airlines

Sat, Aug 22 - Wed, Aug 26

12:33 pm - 11:19 pmONT Ontario-LEX Lexington Blue Grass

7h 46m1 stop Dallas/Fort Worth

5:44 pm - 10:59 pmLEX Lexington Blue Grass-ONT Ontario

8h 15m1 stop Dallas/Fort Worth

$545American Airlines

Sat, Aug 22 - Tue, Aug 25

12:33 pm - 11:19 pmONT Ontario-LEX Lexington Blue Grass

7h 46m1 stop Dallas/Fort Worth

6:00 am - 9:34 amLEX Lexington Blue Grass-ONT Ontario

6h 34m1 stop Dallas/Fort Worth

$545American Airlines

Sat, Aug 22 - Tue, Aug 25

6:08 am - 8:28 pmONT Ontario-LEX Lexington Blue Grass

11h 20m2 stops San Francisco Chicago O'Hare Intl

1:58 pm - 8:53 pmLEX Lexington Blue Grass-ONT Ontario

9h 55m2 stops Chicago O'Hare Intl Denver Intl

$547United Airlines

Tue, Aug 25 - Tue, Sep 1

1:18 pm - 10:38 pmONT Ontario-LEX Lexington Blue Grass

6h 20m1 stop Denver Intl

9:52 am - 9:59 pmLEX Lexington Blue Grass-ONT Ontario

15h 07m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

$559United Airlines

Fri, Aug 21 - Mon, Aug 24

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

American Airlines flights from Ontario to Lexington

Our best American Airlines deals on Ontario to Lexington flight tickets

American Airlines

Sep 9

ONT12:37 pmOntario

7h 44m

1 stop

LEX11:21 pmLexington Blue Grass

Sep 12

LEX6:00 amLexington Blue Grass

6h 29m

1 stop

ONT9:29 amOntario

$441

American Airlines

Sep 6

ONT7:05 amOntario

9h 32m

1 stop

LEX7:37 pmLexington Blue Grass

Sep 15

LEX5:43 pmLexington Blue Grass

7h 54m

1 stop

ONT10:37 pmOntario

$443

American Airlines

Sep 16

ONT12:37 pmOntario

7h 44m

1 stop

LEX11:21 pmLexington Blue Grass

Sep 20

LEX5:23 amLexington Blue Grass

9h 43m

2 stops

ONT12:06 pmOntario

$487

Delta flights from Ontario to Lexington

Our best Delta deals on Ontario to Lexington flight tickets

Delta

Sep 12

ONT12:17 pmOntario

8h 37m

1 stop

LEX11:54 pmLexington Blue Grass

Sep 19

LEX7:00 amLexington Blue Grass

7h 05m

1 stop

ONT11:05 amOntario

$341

Delta

Sep 12

ONT7:05 amOntario

8h 52m

1 stop

LEX6:57 pmLexington Blue Grass

Sep 15

LEX7:00 amLexington Blue Grass

7h 05m

1 stop

ONT11:05 amOntario

$350

Delta

Sep 12

ONT7:05 amOntario

8h 52m

1 stop

LEX6:57 pmLexington Blue Grass

Sep 16

LEX7:00 amLexington Blue Grass

7h 05m

1 stop

ONT11:05 amOntario

$380

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Sat 9/12

12:17 pm-11:54 pm

1 stop8h 37m

Lexington Blue Grass

Sat 9/19

7:00 am-11:05 am

1 stop7h 05m

$341

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Tue 9/15

12:17 pm-11:59 pm

1 stop8h 42m

Lexington Blue Grass

Sat 9/19

6:00 am-11:05 am

1 stop8h 05m

$350

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Mon 9/14

10:00 pm-9:22 am

1 stop8h 22m

Lexington Blue Grass

Sat 9/19

6:00 am-11:05 am

1 stop8h 05m

$350

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Wed 9/9

12:37 pm-11:21 pm

1 stop7h 44m

Lexington Blue Grass

Sat 9/12

6:00 am-9:29 am

1 stop6h 29m

$441

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Fri 9/11

1:18 pm-10:38 pm

1 stop6h 20m

Lexington Blue Grass

Sat 9/19

5:57 pm-10:59 pm

1 stop8h 02m

$441

Quickest round-trip

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Wed 9/30

1:24 pm-10:09 pm

1 stop5h 45m

Lexington Blue Grass

Sat 10/3

6:10 pm-10:49 pm

1 stop7h 39m

$441

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Sun 9/6

7:05 am-7:37 pm

1 stop9h 32m

Lexington Blue Grass

Tue 9/15

5:43 pm-10:37 pm

1 stop7h 54m

$443

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Wed 9/9

9:01 am-12:05 am

2 stops12h 04m

Lexington Blue Grass

Sat 9/12

5:57 pm-10:59 pm

1 stop8h 02m

$446

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Wed 10/21

6:02 am-12:09 am

2 stops15h 07m

Lexington Blue Grass

Sat 10/24

5:29 am-6:00 pm

2 stops15h 31m

$603

OntarioLexington

ONT Ontario - LEX Lexington Blue Grass

ONTLEX

Ontario

Fri 9/25

7:59 pm-10:42 am

2 stops11h 43m

Lexington Blue Grass

Tue 9/29

11:22 am-7:03 pm

2 stops10h 41m

$683

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Lexington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Ontario and Lexington?

Prices are currently typical for flights on this route.

Typical prices usually range from $326 to $690.
The lowest price recently found on this route was $341.

What is the cheapest month to fly to Lexington?

In general, January is the cheapest month to fly from Ontario to Lexington. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you are unable to visit Lexington during the month of January, then departing from Ontario during the month September is also very affordable. Most momondo users find prices during this month for around $336.

When to book flights from Ontario to Lexington

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Lexington according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Lexington (ONT to LEX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Lexington

Best Price Found	$317
Fastest flight time	5h 45m
Direct flights	None

The best one-way flight to Lexington from Ontario in the past 72 hours is $317. The best round-trip flight deal from Ontario to Lexington found on momondo in the last 72 hours is $341.

The fastest flight from Ontario to Lexington takes 5h 45m

There are no direct flights from Ontario to Lexington. There are no popular flight routes from Ontario to Lexington.

Search flight deals

Frequently asked questions about flying from Ontario to Lexington

How far is Ontario to Lexington Blue Grass by plane?
There are 1860.7 mi between Ontario and Lexington Blue Grass. 5h 45m is a normal flight duration for this route.
When did momondo last update prices for flights from Ontario Airport to Lexington Blue Grass Airport?
Prices for flights from Ontario Airport to Lexington Blue Grass Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Lexington Blue Grass Airport?
As of August 2026, there are 3 operators available to choose from for flights from Ontario Airport to Lexington Blue Grass Airport.
How old do you have to be to fly from Ontario Airport to Lexington Blue Grass Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Lexington Blue Grass Airport.
What documentation or ID do you need to fly to Lexington Blue Grass Airport?
The necessary travel and health documents for your Lexington Blue Grass Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Lexington?
Based on momondo bookings for flights between Ontario and Lexington, the leading airline is American Airlines, making up 43% of the total bookings. Other popular airlines include Delta with 33% and United Airlines with 24%.

Best airlines flying from Ontario to Lexington

Compare and see reviews for airlines that fly from Ontario to Lexington with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $288	Free Cancellation	Rating 7.8 8,505 reviews	Search Delta flights
United Airlines	PriceFrom $308	Free Cancellation	Rating 7.4 10,102 reviews	Search United Airlines flights
American Airlines	PriceFrom $359	Free Cancellation	Rating 7.1 11,968 reviews	Search American Airlines flights

Richmond

Georgetown

Somerset

Winchester

Frankfort

Danville

Berea

Versailles

Carlisle

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Lexington?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Lexington from Ontario.

Can I find flights from Ontario to Lexington with flexible booking policies on momondo?

All flight searches from Ontario to Lexington on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Lexington?

momondo provides multiple filters to help you find the best flight to Lexington from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Lexington right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Lexington flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Lexington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 9/19

Sat 9/26

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Nearby airports

Airlines

Cabin classes

Other United States destinations

Other flights from Ontario

Complete your trip

Feeling lucky

Airports servicing Kentucky

Owensboro Daviess County Airport

Paducah Barkley Regional Airport

Louisville Intl Airport

Cheap flights from Ontario to Lexington from $317

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Lexington departing on 8/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Ontario to Lexington

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

American Airlines flights from Ontario to Lexington

Our best American Airlines deals on Ontario to Lexington flight tickets

Delta flights from Ontario to Lexington

Our best Delta deals on Ontario to Lexington flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to Lexington that are best for you.

See travel insights to Lexington from

How to get the cheapest flight ticket from Ontario to Lexington

What is the typical price of a round-trip flight between Ontario and Lexington?

What is the cheapest month to fly to Lexington?

What is the cheapest airline that flies from Ontario to Lexington Blue Grass?

What airlines fly to Lexington?

When to book flights from Ontario to Lexington

Cheap Ontario to Lexington (ONT to LEX) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Lexington

Best airlines flying from Ontario to Lexington

Compare and see reviews for airlines that fly from Ontario to Lexington with momondo

Traveling to a place near Lexington?

Why use momondo?

An easier way to manage your Lexington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Kentucky

Fly your favorite airline to Lexington

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Lexington

List of cabin classes available on flights landing in Lexington. Availability may vary depending on flight origin and airline.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Ontario

According to popular flight searches on momondo this year

Complete your trip to Lexington

Explore popular destinations other users love

According to popular flight searches on momondo this year