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 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.

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 is the most popular carrier 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 September 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.

$108 Cheap Flights from Cincinnati to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Cincinnati to Los Angeles

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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

$182Frontier

Thu, Oct 22 - Mon, Nov 2

12:29 pm - 11:51 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

14h 22m2 stops Atlanta Hartsfield-Jackson Denver Intl

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

5h 56m1 stop Denver Intl

$220Frontier

Sat, Oct 31 - Sat, Nov 7

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

9h 37m1 stop Seattle/Tacoma Intl

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

5h 57m1 stop Denver Intl

$320Multiple Airlines

Tue, Nov 3 - Wed, Nov 4

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

$329Multiple Airlines

Tue, Nov 10 - Tue, Nov 17

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

8h 29m1 stop San Francisco

5:00 am - 2:59 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 59m1 stop Denver Intl

$380United Airlines

Wed, Nov 18 - Thu, Nov 26

4:36 pm - 9:57 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

8h 21m1 stop Phoenix Sky Harbor Intl

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

9h 09m1 stop Dallas/Fort Worth

$385American Airlines

Tue, Jan 5 - Sat, Jan 9

5:50 pm - 10:14 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 24m1 stop Atlanta Hartsfield-Jackson

1:00 pm - 11:09 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

7h 09m1 stop Salt Lake City

$385Delta

Wed, Jan 6 - Mon, Jan 11

5:50 pm - 10:14 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 24m1 stop Atlanta Hartsfield-Jackson

7:00 am - 5:21 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

7h 21m1 stop Atlanta Hartsfield-Jackson

$385Delta

Wed, Jan 6 - Wed, Jan 13

5:40 am - 11:51 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

9h 11m1 stop Dallas/Fort Worth

6:20 am - 7:55 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

10h 35m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$390American Airlines

Tue, Jan 5 - Sat, Jan 9

7:07 am - 11:58 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

7h 51m1 stop San Francisco

5:00 am - 7:14 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 14m2 stops Denver Intl Chicago O'Hare Intl

$402United Airlines

Mon, Dec 21 - Fri, Dec 25

Cheap last minute flights

Enter your travel dates to find the best prices.

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

$474Frontier

Sat, Sep 26 - Sat, Oct 3

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

9h 31m1 stop Denver Intl

7:46 pm - 9:48 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

11h 02m1 stop Dallas/Fort Worth

$474Frontier

Mon, Sep 28 - Sun, Oct 4

8:45 am - 1:45 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

32h 00m2 stops Las Vegas Harry Reid Intl Seattle/Tacoma Intl

12:07 pm - 8:17 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

29h 10m1 stop San Francisco

$577Multiple Airlines

Fri, Sep 25 - Mon, Sep 28

11:09 am - 11:47 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

15h 38m2 stops Dallas/Fort Worth Denver Intl

12:07 pm - 8:17 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

29h 10m1 stop San Francisco

$649Multiple Airlines

Sat, Sep 26 - Mon, Sep 28

6:26 am - 6:41 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

15h 15m2 stops Newark Atlanta Hartsfield-Jackson

12:17 pm - 4:41 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

25h 24m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

$847Delta

Sat, Sep 26 - Tue, Sep 29

8:06 am - 11:47 amCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

6h 41m1 stop Dallas/Fort Worth

8:25 am - 6:22 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

6h 57m1 stop Dallas/Fort Worth

$856American Airlines

Mon, Sep 28 - Tue, Sep 29

6:26 am - 6:41 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

15h 15m2 stops Newark Atlanta Hartsfield-Jackson

12:19 pm - 4:41 pmONT Ontario-CVG Cincinnati Cinci./N. Kentucky

25h 22m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

$882Delta

Sat, Sep 26 - Wed, Sep 30

9:00 am - 8:58 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

14h 58m2 stops Chicago O'Hare Intl Denver Intl

1:52 pm - 9:20 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

16h 28m2 stops San Francisco Chicago O'Hare Intl

$959United Airlines

Fri, Sep 25 - Wed, Sep 30

11:52 am - 10:59 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

14h 07m2 stops Chicago O'Hare Intl San Francisco

4:03 pm - 9:20 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

14h 17m2 stops San Francisco Chicago O'Hare Intl

$959United Airlines

Sat, Sep 26 - Mon, Sep 28

8:06 am - 6:17 pmCVG Cincinnati Cinci./N. Kentucky-ONT Ontario

13h 11m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

1:04 pm - 12:41 amONT Ontario-CVG Cincinnati Cinci./N. Kentucky

8h 37m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$1,163American Airlines

Sat, Sep 26 - Mon, Sep 28

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Frontier flights from Cincinnati to Ontario

Our best Frontier deals on Cincinnati to Ontario flight tickets

Frontier

Oct 22

CVG8:34 pmCincinnati Cinci./N. Kentucky

6h 16m

1 stop

ONT11:50 pmOntario

Nov 2

ONT6:25 amOntario

5h 57m

1 stop

CVG3:22 pmCincinnati Cinci./N. Kentucky

$182

Frontier

Oct 31

CVG12:29 pmCincinnati Cinci./N. Kentucky

14h 22m

2 stops

ONT11:51 pmOntario

Nov 7

ONT6:25 amOntario

5h 56m

1 stop

CVG3:21 pmCincinnati Cinci./N. Kentucky

$220

Frontier

Oct 21

CVG12:43 pmCincinnati Cinci./N. Kentucky

14h 07m

2 stops

ONT11:50 pmOntario

Oct 28

ONT11:52 amOntario

18h 27m

2 stops

CVG9:19 amCincinnati Cinci./N. Kentucky

$222

American Airlines flights from Cincinnati to Ontario

Our best American Airlines deals on Cincinnati to Ontario flight tickets

American Airlines

Oct 6

CVG3:12 pmCincinnati Cinci./N. Kentucky

6h 32m

1 stop

ONT6:44 pmOntario

Oct 10

ONT10:10 pmOntario

7h 59m

1 stop

CVG9:09 amCincinnati Cinci./N. Kentucky

$511

American Airlines

Oct 6

CVG11:58 amCincinnati Cinci./N. Kentucky

9h 45m

2 stops

ONT6:43 pmOntario

Oct 10

ONT10:10 pmOntario

7h 59m

1 stop

CVG9:09 amCincinnati Cinci./N. Kentucky

$516

American Airlines

Oct 6

CVG8:17 amCincinnati Cinci./N. Kentucky

9h 59m

2 stops

ONT3:16 pmOntario

Oct 10

ONT1:05 pmOntario

8h 51m

2 stops

CVG12:56 amCincinnati Cinci./N. Kentucky

$528

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Thu 10/22

8:34 pm-11:50 pm

1 stop6h 16m

Ontario

Mon 11/2

6:25 am-3:22 pm

1 stop5h 57m

$182

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Sat 10/31

12:29 pm-11:51 pm

2 stops14h 22m

Ontario

Sat 11/7

6:25 am-3:21 pm

1 stop5h 56m

$220

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 11/3

8:36 am-3:13 pm

1 stop9h 37m

Ontario

Wed 11/4

6:25 am-3:22 pm

1 stop5h 57m

$320

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 11/10

8:36 am-3:13 pm

1 stop9h 37m

Ontario

Tue 11/17

11:52 am-3:22 pm

1 stop24h 30m

$329

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 11/18

7:00 am-12:29 pm

1 stop8h 29m

Ontario

Thu 11/26

5:00 am-2:59 pm

1 stop6h 59m

$380

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 1/5

4:36 pm-9:57 pm

1 stop8h 21m

Ontario

Sat 1/9

7:00 am-7:09 pm

1 stop9h 09m

$385

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 1/6

5:50 pm-10:14 pm

1 stop7h 24m

Ontario

Mon 1/11

1:00 pm-11:09 pm

1 stop7h 09m

$385

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Wed 1/6

5:50 pm-10:14 pm

1 stop7h 24m

Ontario

Wed 1/13

7:00 am-5:21 pm

1 stop7h 21m

$385

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Tue 1/5

5:40 am-11:51 am

1 stop9h 11m

Ontario

Sat 1/9

6:20 am-7:55 pm

2 stops10h 35m

$390

CincinnatiOntario

CVG Cincinnati Cinci./N. Kentucky - ONT Ontario

CVGONT

Cincinnati Cinci./N. Kentucky

Mon 12/21

7:07 am-11:58 am

1 stop7h 51m

Ontario

Fri 12/25

5:00 am-7:14 pm

2 stops11h 14m

$402

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 typical for flights on this route.

Typical prices usually range from $162 to $650.
The lowest price recently found on this route was $182.

What is the cheapest month to fly to Ontario?

In general, October 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 $278. If you aren’t able to travel during the month of October, then book flights to Ontario from Cincinnati during January instead. Flights to Ontario in January, while not as cheap as those in October, still average around $336.

How have Cincinnati to Ontario flight prices changed over time?

As of September 2026, prices for Cincinnati to Ontario flights are approximately 54% 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	$108
Fastest flight time	6h 15m
Direct flights	None

The best one-way flight to Ontario from Cincinnati in the past 72 hours is $108. The best round-trip flight deal from Cincinnati to Ontario found on momondo in the last 72 hours is $182.

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.

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 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 September 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 (33% of total bookings). The next most popular airlines are American Airlines (31%), Delta (23%), and United Airlines (13%).

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 2,579 reviews	Search Frontier flights
Delta	PriceFrom $277	Free Cancellation	Rating 7.8 8,591 reviews	Search Delta flights
American Airlines	PriceFrom $336	Free Cancellation	Rating 7.0 12,075 reviews	Search American Airlines flights
United Airlines	PriceFrom $373	Free Cancellation	Rating 7.4 10,228 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

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.

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Cheap flights from Cincinnati to Los Angeles from $108

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 10/31. 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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