What is the cheapest airline that flies from Cincinnati Cinci./N. Kentucky to Ontario?

Frontier, Alaska Airlines, and United Airlines are the most popular carriers operating from Cincinnati Cinci./N. Kentucky to Ontario

Which layover airport offers the lowest fares from Cincinnati to Ontario?

Flights via Denver (DEN) offer the lowest average round-trip price of $486.

Which layover airport has the shortest travel time from Cincinnati to Ontario?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 6h 23m.

Which airport is the most popular layover for flights between Cincinnati and Ontario?

Dallas (DFW) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Ontario?

Delta, American Airlines and United Airlines are the top three most popular airlines that fly to Ontario from Cincinnati according to our data. Delta is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 7 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Cincinnati to Ontario?

Salt Lake City (SLC) has the shortest average layover time for this route: 1h 01m.

When did momondo last update prices for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport?

Prices for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport are updated daily.

How many operators does momondo search for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport?

As of August 2026, there are 4 operators available to choose from for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport.

How old do you have to be to fly from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$107 Cheap Flights from Cincinnati to Ontario in 2026

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Find the cheapest flights from Cincinnati to Los Angeles

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5:16 pm - 11:47 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 31m1 stop Denver Intl

6:15 am - 4:11 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 56m1 stop Denver Intl

$202Frontier

Wed, Sep 9 - Sat, Sep 12

5:16 pm - 11:47 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 31m1 stop Denver Intl

6:15 am - 4:11 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 56m1 stop Denver Intl

$217Frontier

Tue, Sep 29 - Wed, Sep 30

9:36 am - 7:36 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

13h 00m1 stop San Francisco

11:45 am - 11:38 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

44h 53m2 stops Denver Intl Atlanta Hartsfield-Jackson

$286Multiple Airlines

Thu, Sep 17 - Tue, Sep 22

9:36 am - 7:36 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

13h 00m1 stop San Francisco

11:45 am - 4:11 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

25h 26m1 stop Denver Intl

$293Multiple Airlines

Thu, Sep 17 - Tue, Sep 22

7:28 am - 12:40 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 12m1 stop Phoenix Sky Harbor Intl

10:34 am - 8:41 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

7h 07m1 stop Dallas/Fort Worth

$357American Airlines

Thu, Dec 24 - Thu, Dec 31

6:00 am - 9:35 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 35m1 stop Dallas/Fort Worth

10:30 pm - 10:38 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

9h 08m1 stop Charlotte Douglas

$357American Airlines

Thu, Oct 22 - Mon, Nov 2

7:55 pm - 11:48 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 53m1 stop Salt Lake City

12:00 pm - 12:24 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

9h 24m1 stop Atlanta Hartsfield-Jackson

$357Delta

Mon, Feb 1 - Tue, Feb 9

7:55 pm - 11:48 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 53m1 stop Salt Lake City

10:59 pm - 9:31 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

7h 32m1 stop Atlanta Hartsfield-Jackson

$357Delta

Mon, Dec 21 - Tue, Dec 29

7:15 am - 12:20 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 05m1 stop San Francisco

1:38 pm - 10:56 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 18m1 stop Denver Intl

$357United Airlines

Wed, Dec 16 - Wed, Dec 30

4:10 pm - 10:49 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 39m1 stop Chicago O'Hare Intl

5:00 am - 2:19 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 19m1 stop Denver Intl

$427United Airlines

Sat, Oct 17 - Sun, Oct 25

Cheap last minute flights

Enter your travel dates to find the best prices.

8:30 pm - 11:50 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 20m1 stop Denver Intl

11:15 am - 8:25 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 10m1 stop Las Vegas Harry Reid Intl

$398Frontier

Fri, Aug 28 - Thu, Sep 3

8:30 pm - 11:50 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 20m1 stop Denver Intl

6:00 am - 7:25 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

10h 25m1 stop Denver Intl

$403Frontier

Mon, Aug 24 - Wed, Sep 2

8:30 pm - 11:50 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 20m1 stop Denver Intl

3:13 pm - 2:53 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

20h 40m2 stops San Francisco Las Vegas Harry Reid Intl

$505Multiple Airlines

Wed, Aug 26 - Wed, Sep 2

8:30 am - 7:03 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

13h 33m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

6:02 am - 5:39 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 37m1 stop Seattle/Tacoma Intl

$612Alaska Airlines

Thu, Aug 27 - Tue, Sep 1

12:29 pm - 10:35 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

13h 06m1 stop Chicago O'Hare Intl

11:00 am - 11:55 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

9h 55m2 stops San Francisco Chicago O'Hare Intl

$675United Airlines

Fri, Aug 28 - Sat, Sep 5

11:17 am - 9:59 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

13h 42m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

1:18 pm - 10:30 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 12m1 stop Denver Intl

$675United Airlines

Mon, Aug 24 - Sat, Sep 5

6:25 am - 6:30 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

15h 05m2 stops Newark Atlanta Hartsfield-Jackson

10:00 pm - 9:50 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 50m1 stop Atlanta Hartsfield-Jackson

$772Delta

Fri, Aug 28 - Fri, Sep 4

6:25 am - 6:30 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

15h 05m2 stops Newark Atlanta Hartsfield-Jackson

6:00 am - 2:49 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

5h 49m1 stop Salt Lake City

$772Delta

Fri, Aug 28 - Thu, Sep 3

6:00 am - 6:47 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

15h 47m2 stops Chicago O'Hare Intl Dallas/Fort Worth

12:33 pm - 11:22 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

7h 49m1 stop Dallas/Fort Worth

$799American Airlines

Wed, Aug 26 - Fri, Sep 4

6:00 am - 6:15 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

15h 15m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

6:00 am - 5:56 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 56m1 stop Dallas/Fort Worth

$816American Airlines

Thu, Aug 27 - Fri, Sep 4

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Frontier flights from Cincinnati to Ontario

Our best Frontier deals on Cincinnati to Ontario flight tickets

Frontier

Sep 9

CVG5:16 pmCincinnati Cinci./N. Kentucky

9h 31m

1 stop

ONT11:47 pmOntario

Sep 12

ONT6:15 amOntario

6h 56m

1 stop

CVG4:11 pmCincinnati Cinci./N. Kentucky

$202

Frontier

Sep 12

CVG5:16 pmCincinnati Cinci./N. Kentucky

9h 31m

1 stop

ONT11:47 pmOntario

Sep 14

ONT11:45 amOntario

25h 26m

1 stop

CVG4:11 pmCincinnati Cinci./N. Kentucky

$218

Frontier

Sep 9

CVG8:56 pmCincinnati Cinci./N. Kentucky

16h 34m

2 stops

ONT10:30 amOntario

Sep 12

ONT6:15 amOntario

6h 56m

1 stop

CVG4:11 pmCincinnati Cinci./N. Kentucky

$230

American Airlines flights from Cincinnati to Ontario

Our best American Airlines deals on Cincinnati to Ontario flight tickets

American Airlines

Sep 5

CVG11:31 amCincinnati Cinci./N. Kentucky

9h 44m

2 stops

ONT6:15 pmOntario

Sep 6

ONT10:00 amOntario

10h 22m

2 stops

CVG11:22 pmCincinnati Cinci./N. Kentucky

$467

American Airlines

Sep 3

CVG11:31 amCincinnati Cinci./N. Kentucky

9h 44m

2 stops

ONT6:15 pmOntario

Sep 12

ONT1:05 pmOntario

8h 36m

2 stops

CVG12:41 amCincinnati Cinci./N. Kentucky

$497

American Airlines

Sep 5

CVG11:31 amCincinnati Cinci./N. Kentucky

9h 44m

2 stops

ONT6:15 pmOntario

Sep 7

ONT6:15 amOntario

7h 35m

1 stop

CVG4:50 pmCincinnati Cinci./N. Kentucky

$613

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 9/9

5:16 pm-11:47 pm

1 stop9h 31m

Ontario

Sat 9/12

6:15 am-4:11 pm

1 stop6h 56m

$202

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 9/29

5:16 pm-11:47 pm

1 stop9h 31m

Ontario

Wed 9/30

6:15 am-4:11 pm

1 stop6h 56m

$217

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 9/17

9:36 am-7:36 pm

1 stop13h 00m

Ontario

Tue 9/22

11:45 am-11:38 am

2 stops44h 53m

$286

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 9/17

9:36 am-7:36 pm

1 stop13h 00m

Ontario

Tue 9/22

11:45 am-4:11 pm

1 stop25h 26m

$293

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 12/24

7:28 am-12:40 pm

1 stop8h 12m

Ontario

Thu 12/31

10:34 am-8:41 pm

1 stop7h 07m

$357

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 10/22

6:00 am-9:35 am

1 stop6h 35m

Ontario

Mon 11/2

10:30 pm-10:38 am

1 stop9h 08m

$357

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 2/1

7:55 pm-11:48 pm

1 stop6h 53m

Ontario

Tue 2/9

12:00 pm-12:24 am

1 stop9h 24m

$357

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 12/21

7:55 pm-11:48 pm

1 stop6h 53m

Ontario

Tue 12/29

10:59 pm-9:31 am

1 stop7h 32m

$357

Quickest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 12/16

7:15 am-12:20 pm

1 stop8h 05m

Ontario

Wed 12/30

1:38 pm-10:56 pm

1 stop6h 18m

$357

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 10/17

4:10 pm-10:49 pm

1 stop9h 39m

Ontario

Sun 10/25

5:00 am-2:19 pm

1 stop6h 19m

$427

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 Cincinnati to Ontario

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

Layovers

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

Prices are currently low for flights on this route.

Typical prices usually range from $304 to $483.
The lowest price recently found on this route was $202.

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from Cincinnati to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $336. If you aren’t able to travel during the month of January, then book flights to Ontario from Cincinnati during July instead. Flights to Ontario in July, while not as cheap as those in January, still average around $358.

How have Cincinnati to Ontario flight prices changed over time?

As of August 2026, prices for Cincinnati to Ontario flights are approximately 9% cheaper when compared to flights at the same time last year.

When to book flights from Cincinnati to Ontario

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

Estimated round-trip price

Cheap Cincinnati to Ontario (CVG to ONT) flight deals and tips

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

Best Price Found	$107
Fastest flight time	6h 20m
Direct flights	None

The best one-way flight to Ontario from Cincinnati in the past 72 hours is $107. The best round-trip flight deal from Cincinnati to Ontario found on momondo in the last 72 hours is $202.

The fastest flight from Cincinnati to Ontario takes 6h 20m

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

Search flight deals

Frequently asked questions about flying from Cincinnati to Ontario

How far is Cincinnati Cinci./N. Kentucky to Ontario by plane?
The distance between Cincinnati Cinci./N. Kentucky and Ontario is about 1859.2 mi. In terms of flight time, this usually takes a little over 6h 20m.
When did momondo last update prices for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport?
Prices for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport are updated daily.
How many operators does momondo search for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport?
As of August 2026, there are 4 operators available to choose from for flights from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport.
How old do you have to be to fly from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cincinnati Cinci./N. Kentucky Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Cincinnati to Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Cincinnati to Ontario is Frontier (32% of total bookings). The next most popular airlines are American Airlines (28%), Delta (28%), and United Airlines (12%).

Best airlines flying from Cincinnati to Ontario

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $157	Free Cancellation	Rating 5.6 2,657 reviews	Search Frontier flights
United Airlines	PriceFrom $316	Free Cancellation	Rating 7.4 10,114 reviews	Search United Airlines flights
American Airlines	PriceFrom $336	Free Cancellation	Rating 7.1 11,986 reviews	Search American Airlines flights
Delta	PriceFrom $337	Free Cancellation	Rating 7.8 8,513 reviews	Search Delta flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Cincinnati to Ontario for you.

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

Yes. momondo allows you to filter the results for Cincinnati to Ontario flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Cincinnati and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Ontario from Cincinnati. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

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Cheap flights from Cincinnati to Los Angeles from $107

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Cincinnati to Los Angeles departing on 9/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Cincinnati to Ontario

Our best Frontier deals on Cincinnati to Ontario flight tickets

American Airlines flights from Cincinnati to Ontario

Our best American Airlines deals on Cincinnati to Ontario flight tickets

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How to get the cheapest flight ticket from Cincinnati to Ontario

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

What is the cheapest month to fly to Ontario?

How have Cincinnati to Ontario flight prices changed over time?

What is the cheapest airline that flies from Cincinnati Cinci./N. Kentucky to Ontario?

What airlines fly to Ontario?

Which airport is the most popular layover for flights between Cincinnati and Ontario?

Which layover airport offers the lowest fares from Cincinnati to Ontario?

Which layover airport has the shortest travel time from Cincinnati to Ontario?

Which layover airport has the shortest connection time from Cincinnati to Ontario?

When to book flights from Cincinnati to Ontario

Cheap Cincinnati to Ontario (CVG to ONT) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Cincinnati to Ontario

Best airlines flying from Cincinnati to Ontario

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

Why use momondo?

An easier way to manage your Ontario 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 California

Fly your favorite airline to Los Angeles

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

Cabin classes currently available on flights to Los Angeles

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

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