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

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

How many flights depart from Cincinnati to Ontario on average per week?

2 flights are operational weekly from Cincinnati to Ontario as of October 2026. The most popular departure day for this route is Thu, with 50% of flights per week taking off on this day.

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 36% 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 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 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.

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.

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.

$84 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 - 10:17 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 15m1 stop Denver Intl

11:30 am - 5:59 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

27h 29m1 stop Denver Intl

$178Frontier

Sat, Dec 5 - Fri, Dec 11

4:54 pm - 10:45 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

20h 51m2 stops Atlanta Hartsfield-Jackson Denver Intl

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

8h 59m1 stop Denver Intl

$188Frontier

Wed, Dec 2 - Wed, Dec 9

10:11 am - 12:05 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

40h 54m2 stops Atlanta Hartsfield-Jackson Denver Intl

8:02 am - 4:03 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

29h 01m1 stop Las Vegas Harry Reid Intl

$196Multiple Airlines

Mon, Jan 11 - Wed, Jan 20

10:11 am - 12:05 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

40h 54m2 stops Atlanta Hartsfield-Jackson Denver Intl

8:02 am - 4:03 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

29h 01m1 stop Las Vegas Harry Reid Intl

$200Multiple Airlines

Mon, Jan 11 - Wed, Jan 20

7:28 am - 12:39 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 11m1 stop Phoenix Sky Harbor Intl

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

7:14 pm - 11:59 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 45m1 stop Dallas/Fort Worth

11:59 pm - 10:49 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

7h 50m1 stop Dallas/Fort Worth

$329American Airlines

Tue, Dec 1 - Mon, Dec 7

7:35 pm - 11:57 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 22m1 stop Salt Lake City

1:11 pm - 11:08 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 57m1 stop Salt Lake City

$329Delta

Wed, Dec 2 - Sat, Dec 5

6:00 am - 11:07 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 07m1 stop Atlanta Hartsfield-Jackson

6:00 am - 3:30 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 30m1 stop Salt Lake City

$329Delta

Thu, Dec 3 - Mon, Dec 7

2:05 pm - 9:00 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

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

5:00 am - 4:37 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 37m2 stops Denver Intl Chicago O'Hare Intl

$429United Airlines

Mon, Feb 1 - Sun, Feb 7

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

8h 29m1 stop San Francisco

9:25 am - 7:45 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

7h 20m1 stop San Francisco

$438United Airlines

Mon, Nov 23 - Mon, Nov 30

Cheap last minute flights

Enter your travel dates to find the best prices.

4:32 pm - 11:51 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 19m1 stop Denver Intl

6:30 am - 3:22 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

5h 52m1 stop Denver Intl

$310Frontier

Wed, Nov 4 - Wed, Nov 18

4:32 pm - 11:51 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 19m1 stop Denver Intl

8:03 pm - 9:20 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

10h 17m1 stop Dallas/Fort Worth

$315Frontier

Wed, Nov 4 - Thu, Nov 19

4:32 pm - 11:51 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 19m1 stop Denver Intl

6:30 am - 3:21 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

5h 51m1 stop Denver Intl

$340Frontier

Wed, Nov 4 - Sat, Nov 14

4:32 pm - 11:51 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

10h 19m1 stop Denver Intl

6:45 am - 5:57 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 12m1 stop Denver Intl

$380Frontier

Wed, Nov 4 - Fri, Nov 20

9:36 am - 7:30 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

12h 54m1 stop San Francisco

8:35 pm - 11:43 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

36h 08m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson

$568Multiple Airlines

Thu, Nov 5 - Sun, Nov 8

9:36 am - 7:30 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

12h 54m1 stop San Francisco

8:03 pm - 6:33 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

19h 30m1 stop Dallas/Fort Worth

$605Multiple Airlines

Thu, Nov 5 - Sun, Nov 8

8:36 am - 3:13 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 37m1 stop Seattle/Tacoma Intl

11:52 am - 3:22 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

24h 30m1 stop Denver Intl

$691Multiple Airlines

Tue, Nov 3 - Tue, Nov 10

8:55 am - 6:47 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

12h 52m1 stop Chicago O'Hare Intl

7:00 am - 8:47 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

10h 47m1 stop Chicago O'Hare Intl

$1,103United Airlines

Sun, Nov 1 - Tue, Nov 3

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

8h 29m1 stop San Francisco

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

6h 19m1 stop Denver Intl

$1,462United Airlines

Tue, Nov 3 - Tue, Nov 10

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

8h 29m1 stop San Francisco

6:00 am - 3:45 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 45m1 stop Houston George Bush Intcntl

$1,796United Airlines

Thu, Nov 5 - Mon, Nov 9

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Frontier flights from Cincinnati to Ontario

Our best Frontier deals on Cincinnati to Ontario flight tickets

Frontier

Dec 5

CVG7:02 pmCincinnati Cinci./N. Kentucky

6h 15m

1 stop

ONT10:17 pmOntario

Dec 11

ONT11:30 amOntario

27h 29m

1 stop

CVG5:59 pmCincinnati Cinci./N. Kentucky

$178

Frontier

Dec 2

CVG4:54 pmCincinnati Cinci./N. Kentucky

20h 51m

2 stops

ONT10:45 amOntario

Dec 9

ONT6:00 amOntario

8h 59m

1 stop

CVG5:59 pmCincinnati Cinci./N. Kentucky

$188

Frontier

Dec 7

CVG9:24 amCincinnati Cinci./N. Kentucky

16h 59m

2 stops

ONT11:23 pmOntario

Dec 9

ONT6:00 amOntario

8h 59m

1 stop

CVG5:59 pmCincinnati Cinci./N. Kentucky

$194

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 12/5

7:02 pm-10:17 pm

1 stop6h 15m

Ontario

Fri 12/11

11:30 am-5:59 pm

1 stop27h 29m

$178

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 12/2

4:54 pm-10:45 am

2 stops20h 51m

Ontario

Wed 12/9

6:00 am-5:59 pm

1 stop8h 59m

$188

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 1/11

10:11 am-12:05 am

2 stops40h 54m

Ontario

Wed 1/20

8:02 am-4:03 pm

1 stop29h 01m

$196

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 1/11

10:11 am-12:05 am

2 stops40h 54m

Ontario

Wed 1/20

8:02 am-4:03 pm

1 stop29h 01m

$200

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 12/3

7:28 am-12:39 pm

1 stop8h 11m

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 12/1

7:14 pm-11:59 pm

1 stop7h 45m

Ontario

Mon 12/7

11:59 pm-10:49 am

1 stop7h 50m

$329

Quickest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 12/2

7:35 pm-11:57 pm

1 stop7h 22m

Ontario

Sat 12/5

1:11 pm-11:08 pm

1 stop6h 57m

$329

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 12/3

6:00 am-11:07 am

1 stop8h 07m

Ontario

Mon 12/7

6:00 am-3:30 pm

1 stop6h 30m

$329

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 2/1

2:05 pm-9:00 pm

2 stops9h 55m

Ontario

Sun 2/7

5:00 am-4:37 pm

2 stops8h 37m

$429

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 11/23

7:00 am-12:29 pm

1 stop8h 29m

Ontario

Mon 11/30

9:25 am-7:45 pm

1 stop7h 20m

$438

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

Other information

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 $354 to $492.
The lowest price recently found on this route was $178.

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	$84
Fastest flight time	6h 15m
Direct flights	None

The best one-way flight to Ontario from Cincinnati in the past 72 hours is $84. The best round-trip flight deal from Cincinnati to Ontario found on momondo in the last 72 hours is $178.

The fastest flight from Cincinnati to Ontario takes 6h 15m

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 15m.
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 (36% of total bookings). The next most popular airlines are Frontier (30%), 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 2,516 reviews	Search Frontier flights
Delta	PriceFrom $277	Free Cancellation	Rating 7.8 8,692 reviews	Search Delta flights
American Airlines	PriceFrom $318	Free Cancellation	Rating 7.0 12,210 reviews	Search American Airlines flights
United Airlines	PriceFrom $373	Free Cancellation	Rating 7.3 10,451 reviews	Search United Airlines flights

United Airlines Flights From Cincinnati to Ontario
United Airlines flight deals from Cincinnati to Ontario start from $373 round-trip. Over the 2 United Airlines flights for this route in a normal week, average airfare is usually $411 round-trip - but some users have found much cheaper deals with momondo.

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 $84

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 12/12. 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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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?

How many flights depart from Cincinnati to Ontario on average per week?

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

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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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