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 connection time from Cincinnati to Ontario?

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

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.

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

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

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 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.

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.

$109 Cheap Flights from Cincinnati to Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Cincinnati to Los Angeles

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

9:28 pm - 1:40 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

19h 12m1 stop Denver Intl

6:15 am - 8:29 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 14m1 stop Denver Intl

$204Frontier

Tue, Nov 3 - Sat, Nov 7

4:32 pm - 11:50 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 18m1 stop Denver Intl

2:35 pm - 11:43 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

18h 08m2 stops Denver Intl Atlanta Hartsfield-Jackson

$212Frontier

Wed, Oct 21 - Tue, Oct 27

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

9h 31m1 stop Denver Intl

6:02 am - 5:36 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 34m1 stop Seattle/Tacoma Intl

$278Multiple Airlines

Wed, Sep 23 - Sat, Sep 26

7:00 am - 12:10 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 10m1 stop Salt Lake City

11:10 pm - 11:07 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 57m1 stop Atlanta Hartsfield-Jackson

$317Delta

Thu, Dec 3 - Mon, Dec 7

5:34 am - 12:03 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 29m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

6:15 am - 3:43 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 28m1 stop Phoenix Sky Harbor Intl

$322American Airlines

Sat, Sep 19 - Wed, Sep 23

6:00 am - 9:29 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 29m1 stop Dallas/Fort Worth

7:11 pm - 9:26 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 15m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$322American Airlines

Sat, Sep 19 - Thu, Sep 24

8:39 am - 6:00 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

12h 21m1 stop Seattle/Tacoma Intl

8:35 pm - 6:07 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 32m1 stop Las Vegas Harry Reid Intl

$334Multiple Airlines

Sat, Oct 17 - Fri, Oct 23

7:35 pm - 11:58 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 23m1 stop Salt Lake City

12:22 pm - 12:24 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

9h 02m1 stop Atlanta Hartsfield-Jackson

$357Delta

Tue, Dec 8 - Wed, Dec 16

3:23 pm - 8:51 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 28m1 stop Denver Intl

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

6h 19m1 stop Denver Intl

$417United Airlines

Sat, Oct 31 - Sat, Nov 14

3:27 pm - 8:58 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 31m1 stop Denver Intl

6:00 am - 8:16 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 16m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

$422United Airlines

Sat, Sep 26 - Tue, Sep 29

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

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

10h 25m1 stop Denver Intl

$398Frontier

Fri, Aug 21 - Fri, Aug 28

9:20 pm - 4:22 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

22h 02m1 stop Las Vegas Harry Reid Intl

3:40 pm - 8:25 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

25h 45m1 stop Las Vegas Harry Reid Intl

$398Frontier

Wed, Aug 19 - Wed, Sep 2

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

$418Frontier

Fri, Aug 21 - Sun, Aug 23

2:53 pm - 10:35 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 42m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

5:00 am - 4:55 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 55m2 stops Denver Intl Chicago O'Hare Intl

$859United Airlines

Wed, Aug 19 - Wed, Sep 2

2:05 pm - 10:35 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

11h 30m1 stop Chicago O'Hare Intl

7:13 pm - 1:09 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

14h 56m2 stops San Francisco Chicago O'Hare Intl

$882United Airlines

Thu, Aug 20 - Mon, Aug 24

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

13h 06m1 stop Chicago O'Hare Intl

7:13 pm - 1:09 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

14h 56m2 stops San Francisco Chicago O'Hare Intl

$882United Airlines

Thu, Aug 20 - Mon, Aug 24

6:00 am - 12:03 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 03m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

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

8h 56m1 stop Dallas/Fort Worth

$1,002American Airlines

Fri, Aug 21 - Mon, Aug 24

11:23 am - 6:15 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 52m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

6:15 am - 6:59 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

9h 44m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$1,007American Airlines

Fri, Aug 21 - Tue, Aug 25

8:10 am - 2:00 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 50m2 stops Chicago Midway Denver Intl

5:15 am - 4:45 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 30m2 stops Phoenix Sky Harbor Intl Denver Intl

$1,007Southwest

Fri, Aug 21 - Mon, Aug 24

9:54 am - 7:03 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

12h 09m2 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

$1,135Alaska Airlines

Fri, Aug 21 - Tue, Aug 25

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United Airlines flights from Cincinnati to Ontario

Our best United Airlines deals on Cincinnati to Ontario flight tickets

United Airlines

Aug 29

CVG4:15 pmCincinnati Cinci./N. Kentucky

9h 20m

1 stop

ONT10:35 pmOntario

Aug 31

ONT5:00 amOntario

8h 55m

2 stops

CVG4:55 pmCincinnati Cinci./N. Kentucky

$608

United Airlines

Aug 31

CVG4:15 pmCincinnati Cinci./N. Kentucky

9h 20m

1 stop

ONT10:35 pmOntario

Sep 2

ONT5:00 amOntario

11h 12m

2 stops

CVG7:12 pmCincinnati Cinci./N. Kentucky

$722

United Airlines

Aug 19

CVG2:53 pmCincinnati Cinci./N. Kentucky

10h 42m

2 stops

ONT10:35 pmOntario

Sep 2

ONT5:00 amOntario

8h 55m

2 stops

CVG4:55 pmCincinnati Cinci./N. Kentucky

$859

Frontier flights from Cincinnati to Ontario

Our best Frontier deals on Cincinnati to Ontario flight tickets

Frontier

Oct 21

CVG4:32 pmCincinnati Cinci./N. Kentucky

10h 18m

1 stop

ONT11:50 pmOntario

Oct 27

ONT2:35 pmOntario

18h 08m

2 stops

CVG11:43 amCincinnati Cinci./N. Kentucky

$212

Frontier

Oct 7

CVG5:16 pmCincinnati Cinci./N. Kentucky

9h 31m

1 stop

ONT11:47 pmOntario

Oct 21

ONT6:15 amOntario

6h 12m

1 stop

CVG3:27 pmCincinnati Cinci./N. Kentucky

$218

Frontier

Sep 19

CVG5:16 pmCincinnati Cinci./N. Kentucky

9h 31m

1 stop

ONT11:47 pmOntario

Sep 23

ONT6:15 amOntario

6h 56m

1 stop

CVG4:11 pmCincinnati Cinci./N. Kentucky

$219

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 11/3

9:28 pm-1:40 pm

1 stop19h 12m

Ontario

Sat 11/7

6:15 am-8:29 pm

1 stop11h 14m

$204

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 10/21

4:32 pm-11:50 pm

1 stop10h 18m

Ontario

Tue 10/27

2:35 pm-11:43 am

2 stops18h 08m

$212

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 9/23

5:16 pm-11:47 pm

1 stop9h 31m

Ontario

Sat 9/26

6:02 am-5:36 pm

1 stop8h 34m

$278

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 12/3

7:00 am-12:10 pm

1 stop8h 10m

Ontario

Mon 12/7

11:10 pm-11:07 am

1 stop8h 57m

$317

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 9/19

5:34 am-12:03 pm

2 stops9h 29m

Ontario

Wed 9/23

6:15 am-3:43 pm

1 stop6h 28m

$322

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 9/19

6:00 am-9:29 am

1 stop6h 29m

Ontario

Thu 9/24

7:11 pm-9:26 am

2 stops11h 15m

$322

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 10/17

8:39 am-6:00 pm

1 stop12h 21m

Ontario

Fri 10/23

8:35 pm-6:07 am

1 stop6h 32m

$334

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 12/8

7:35 pm-11:58 pm

1 stop7h 23m

Ontario

Wed 12/16

12:22 pm-12:24 am

1 stop9h 02m

$357

Quickest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 10/31

3:23 pm-8:51 pm

1 stop8h 28m

Ontario

Sat 11/14

5:00 am-2:19 pm

1 stop6h 19m

$417

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 9/26

3:27 pm-8:58 pm

1 stop8h 31m

Ontario

Tue 9/29

6:00 am-8:16 pm

2 stops11h 16m

$422

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 $445 to $476.
The lowest price recently found on this route was $212.

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	$109
Fastest flight time	6h 20m
Direct flights	None

The best one-way flight to Ontario from Cincinnati in the past 72 hours is $109. The best round-trip flight deal from Cincinnati to Ontario found on momondo in the last 72 hours is $204.

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.

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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 2,681 reviews	Search Frontier flights
United Airlines	PriceFrom $316	Free Cancellation	Rating 7.4 10,106 reviews	Search United Airlines flights
American Airlines	PriceFrom $336	Free Cancellation	Rating 7.1 11,946 reviews	Search American Airlines flights
Delta	PriceFrom $337	Free Cancellation	Rating 7.8 8,504 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 $109

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 9/19. 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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United Airlines flights from Cincinnati to Ontario

Our best United Airlines deals on Cincinnati to Ontario flight tickets

Frontier flights from Cincinnati to Ontario

Our best Frontier 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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