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

Dallas (DFW) was the most common stop: 25% 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 8 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 travel time from Cincinnati to Ontario?

Flights connecting via Nashville (BNA) have the shortest average one-way travel time: 6h 20m.

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.

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

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

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 October 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.

$132 Cheap Flights from Cincinnati to Ontario in 2026/27

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Find the cheapest flights from Cincinnati to Los Angeles

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7:02 pm - 12:20 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 18m1 stop Denver Intl

6:00 am - 5:59 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 59m1 stop Denver Intl

$256Frontier

Fri, Dec 11 - Wed, Dec 16

7:02 pm - 10:45 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

18h 43m1 stop Denver Intl

6:00 am - 5:59 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 59m1 stop Denver Intl

$258Frontier

Sat, Dec 5 - Sat, Dec 12

7:02 pm - 12:20 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 18m1 stop Denver Intl

7:26 pm - 8:17 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

21h 51m1 stop San Francisco

$297Multiple Airlines

Fri, Dec 11 - Mon, Dec 14

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

7h 32m1 stop Dallas/Fort Worth

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

9h 08m1 stop Charlotte Douglas

$329American Airlines

Thu, Dec 3 - Mon, Dec 7

5:40 am - 9:44 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 04m1 stop Dallas/Fort Worth

7:00 am - 7:09 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

9h 09m1 stop Dallas/Fort Worth

$329American Airlines

Tue, Jan 5 - Sat, Jan 9

6:40 am - 12:30 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 50m1 stop Salt Lake City

7:00 am - 6:49 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 49m1 stop Atlanta Hartsfield-Jackson

$329Delta

Sat, Jan 16 - Sat, Jan 23

7:45 pm - 11:49 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 04m1 stop Salt Lake City

1:15 pm - 11:07 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 52m1 stop Salt Lake City

$329Delta

Mon, Nov 16 - Mon, Nov 23

2:30 pm - 8:40 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 10m2 stops Denver Intl Las Vegas Harry Reid Intl

10:55 am - 8:30 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 35m1 stop Chicago Midway

$335Southwest

Mon, Dec 7 - Thu, Dec 10

7:00 am - 12:29 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 29m1 stop San Francisco

5:00 am - 5:25 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

9h 25m2 stops Denver Intl Chicago O'Hare Intl

$352United Airlines

Mon, Nov 16 - Mon, Nov 23

8:45 am - 5:35 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

11h 50m2 stops Denver Intl San Francisco

5:00 am - 2:22 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 22m1 stop Denver Intl

$381United Airlines

Thu, Jan 14 - Fri, Jan 22

Cheap last minute flights

Enter your travel dates to find the best prices.

8:34 pm - 11:50 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 16m1 stop Denver Intl

6:25 am - 3:22 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

5h 57m1 stop Denver Intl

$420Frontier

Sun, Oct 25 - Wed, Oct 28

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

10h 18m1 stop Denver Intl

6:25 am - 3:21 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

5h 56m1 stop Denver Intl

$435Frontier

Sat, Oct 24 - Sat, Oct 31

8:20 am - 4:30 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

11h 10m1 stop Las Vegas Harry Reid Intl

6:25 am - 3:22 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

5h 57m1 stop Denver Intl

$440Frontier

Fri, Oct 23 - Fri, Oct 30

5:00 pm - 9:54 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 54m1 stop Atlanta Hartsfield-Jackson

6:00 am - 3:15 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 15m1 stop Salt Lake City

$847Delta

Fri, Oct 23 - Sun, Nov 1

6:08 pm - 10:49 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 41m1 stop Chicago O'Hare Intl

1:29 pm - 10:40 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 11m1 stop Denver Intl

$1,117United Airlines

Thu, Oct 22 - Tue, Oct 27

5:30 am - 12:46 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 16m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 8:16 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

10h 16m1 stop Chicago O'Hare Intl

$1,118United Airlines

Tue, Oct 20 - Wed, Oct 21

11:52 am - 10:49 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

13h 57m1 stop Chicago O'Hare Intl

6:00 am - 11:59 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

14h 59m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

$1,122United Airlines

Tue, Oct 20 - Thu, Oct 22

11:58 am - 11:42 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

14h 44m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

6:56 pm - 9:24 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 28m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

$1,168Alaska Airlines

Fri, Oct 23 - Mon, Oct 26

11:58 am - 11:42 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

14h 44m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

6:56 pm - 9:24 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 28m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

$1,268Alaska Airlines

Thu, Oct 22 - Mon, Oct 26

5:30 am - 1:16 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 46m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

6:02 am - 8:46 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 44m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

$1,268Alaska Airlines

Wed, Oct 21 - Wed, Oct 28

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Frontier flights from Cincinnati to Ontario

Our best Frontier deals on Cincinnati to Ontario flight tickets

Frontier

Dec 11

CVG7:02 pmCincinnati Cinci./N. Kentucky

8h 18m

1 stop

ONT12:20 amOntario

Dec 16

ONT6:00 amOntario

8h 59m

1 stop

CVG5:59 pmCincinnati Cinci./N. Kentucky

$256

Frontier

Dec 5

CVG7:02 pmCincinnati Cinci./N. Kentucky

18h 43m

1 stop

ONT10:45 amOntario

Dec 12

ONT6:00 amOntario

8h 59m

1 stop

CVG5:59 pmCincinnati Cinci./N. Kentucky

$258

Frontier

Dec 7

CVG7:02 pmCincinnati Cinci./N. Kentucky

18h 43m

1 stop

ONT10:45 amOntario

Dec 10

ONT11:30 amOntario

27h 29m

1 stop

CVG5:59 pmCincinnati Cinci./N. Kentucky

$268

Southwest flights from Cincinnati to Ontario

Our best Southwest deals on Cincinnati to Ontario flight tickets

Southwest

Dec 7

CVG2:30 pmCincinnati Cinci./N. Kentucky

9h 10m

2 stops

ONT8:40 pmOntario

Dec 10

ONT10:55 amOntario

6h 35m

1 stop

CVG8:30 pmCincinnati Cinci./N. Kentucky

$335

Southwest

Dec 7

CVG2:30 pmCincinnati Cinci./N. Kentucky

9h 10m

2 stops

ONT8:40 pmOntario

Dec 11

ONT5:00 amOntario

8h 55m

2 stops

CVG4:55 pmCincinnati Cinci./N. Kentucky

$343

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Fri 12/11

7:02 pm-12:20 am

1 stop8h 18m

Ontario

Wed 12/16

6:00 am-5:59 pm

1 stop8h 59m

$256

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 12/5

7:02 pm-10:45 am

1 stop18h 43m

Ontario

Sat 12/12

6:00 am-5:59 pm

1 stop8h 59m

$258

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Fri 12/11

7:02 pm-12:20 am

1 stop8h 18m

Ontario

Mon 12/14

7:26 pm-8:17 pm

1 stop21h 51m

$297

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 12/3

7:40 am-12:12 pm

1 stop7h 32m

Ontario

Mon 12/7

10:30 pm-10:38 am

1 stop9h 08m

$329

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 1/5

5:40 am-9:44 am

1 stop7h 04m

Ontario

Sat 1/9

7:00 am-7:09 pm

1 stop9h 09m

$329

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 1/16

6:40 am-12:30 pm

1 stop8h 50m

Ontario

Sat 1/23

7:00 am-6:49 pm

1 stop8h 49m

$329

Quickest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 11/16

7:45 pm-11:49 pm

1 stop7h 04m

Ontario

Mon 11/23

1:15 pm-11:07 pm

1 stop6h 52m

$329

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 12/7

2:30 pm-8:40 pm

2 stops9h 10m

Ontario

Thu 12/10

10:55 am-8:30 pm

1 stop6h 35m

$335

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 11/16

7:00 am-12:29 pm

1 stop8h 29m

Ontario

Mon 11/23

5:00 am-5:25 pm

2 stops9h 25m

$352

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 1/14

8:45 am-5:35 pm

2 stops11h 50m

Ontario

Fri 1/22

5:00 am-2:22 pm

1 stop6h 22m

$381

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 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 October 2026, prices for Cincinnati to Ontario flights are approximately 136% more expensive 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	$132
Fastest flight time	6h 53m
Direct flights	None

The best one-way flight to Ontario from Cincinnati in the past 72 hours is $132. The best round-trip flight deal from Cincinnati to Ontario found on momondo in the last 72 hours is $256.

The fastest flight from Cincinnati to Ontario takes 6h 53m

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 53m.
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 October 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 American Airlines (34% of total bookings). The next most popular airlines are Frontier (31%), Delta (21%), and United Airlines (14%).

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 $208	Free Cancellation	Rating 5.5 2,527 reviews	Search Frontier flights
Delta	PriceFrom $277	Free Cancellation	Rating 7.8 8,650 reviews	Search Delta flights
American Airlines	PriceFrom $318	Free Cancellation	Rating 7.0 12,174 reviews	Search American Airlines flights
United Airlines	PriceFrom $373	Free Cancellation	Rating 7.3 10,388 reviews	Search United Airlines 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 $132

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 12/8. 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

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Our best Southwest 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 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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