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$76+ Cheap flights from Cleveland to Ontario (CLE - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
CLE — ONT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Cleveland Hopkins Intl to Ontario are usually found in August or February, booked 27 days in advance, depart on a Tuesday or Friday and return on a Monday

Cheap flight deals from Cleveland to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Cleveland (CLE) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$150
(Mytrip)

One-way from

$76
(Booking.com)

Popular in

November

Cheapest in

August

Average price

$260
From Cleveland Hopkins Intl to Ontario
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One-way flight from Cleveland Hopkins Intl to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Cleveland to Ontario

Cheapest flights from Cleveland to Ontario
Explore the most affordable flight options available from Cleveland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/58:11 pmCLE - ONT
1 stop29h 02mFrontier
Thu 10/166:53 amONT - CLE
1 stop25h 13mFrontier
Deal found 8/13$150
This Booking.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/118:11 pmCLE - ONT
1 stop14h 12mFrontier
Thu 9/188:59 pmONT - CLE
1 stop19h 07mFrontier
Deal found 8/14$151
This Mytrip deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/65:49 pmCLE - ONT
1 stop16h 34mFrontier
Mon 9/810:28 pmONT - CLE
1 stop16h 02mFrontier
Deal found 8/13$158
This Booking.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:11 pmCLE - ONT
1 stop26h 43mFrontier
Tue 9/98:00 amONT - CLE
1 stop6h 30mFrontier
Deal found 8/14$159
This Cheapflightsfares deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:09 pmCLE - ONT
1 stop6h 41mFrontier
Wed 11/198:00 amONT - CLE
1 stop6h 46mFrontier
Deal found 8/14$165
This FlightHub deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/65:49 pmCLE - ONT
1 stop16h 34mFrontier
Sun 9/213:43 pmONT - CLE
1 stop24h 23mFrontier
Deal found 8/13$178
This Booking.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:49 pmCLE - ONT
1 stop16h 34mFrontier
Sat 9/208:00 amONT - CLE
1 stop6h 30mFrontier
Deal found 8/14$187
This Booking.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:25 pmCLE - ONT
1 stop6h 31mFrontier
Fri 10/34:08 pmONT - CLE
1 stop21h 36mFrontier
Deal found 8/14$192
This Mytrip deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:11 pmCLE - ONT
1 stop14h 42mFrontier
Sun 10/57:15 pmONT - CLE
1 stop12h 47mFrontier
Deal found 8/13$197
This Mytrip deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/228:11 pmCLE - ONT
1 stop6h 39mFrontier
Sat 8/2312:59 amONT - CLE
1 stop15h 07mFrontier
Deal found 8/13$200
This Frontier deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:00 amCLE - ONT
1 stop6h 54mFrontier
Fri 10/316:53 amONT - CLE
2 stops15h 01mFrontier
Deal found 8/14$201

Cheapflights Fare Finder

 
Customize your flight search to find flights from Cleveland to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from Cleveland to Ontario that are best for you.

Fly from

Cleveland

Fly to

Ontario

Route

Depart

Return

Price

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Sun 10/5

8:11 pm-10:13 pm

1 stop29h 02m

Ontario

Thu 10/16

6:53 am-11:06 am

1 stop25h 13m

$150

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Sun 9/7

8:11 pm-7:54 pm

1 stop26h 43m

Ontario

Sun 9/21

3:43 pm-7:06 pm

1 stop24h 23m

$151

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Thu 9/11

8:11 pm-7:23 am

1 stop14h 12m

Ontario

Sun 9/14

8:59 pm-7:06 pm

1 stop19h 07m

$151

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Thu 9/11

8:11 pm-7:23 am

1 stop14h 12m

Ontario

Thu 9/18

8:59 pm-7:06 pm

1 stop19h 07m

$151

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Sat 9/6

5:49 pm-7:23 am

1 stop16h 34m

Ontario

Mon 9/8

10:28 pm-5:30 pm

1 stop16h 02m

$158

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Tue 9/9

6:25 pm-9:56 pm

1 stop6h 31m

Ontario

Sun 9/14

8:59 pm-7:06 pm

1 stop19h 07m

$159

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Fri 9/5

8:11 pm-7:54 pm

1 stop26h 43m

Ontario

Tue 9/9

8:00 am-5:30 pm

1 stop6h 30m

$159

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Mon 11/10

8:09 pm-11:50 pm

1 stop6h 41m

Ontario

Wed 11/19

8:00 am-5:46 pm

1 stop6h 46m

$165

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Sat 9/6

5:49 pm-7:23 am

1 stop16h 34m

Ontario

Sun 9/21

3:43 pm-7:06 pm

1 stop24h 23m

$178

ClevelandOntario

CLE - ONT

CLEONT

Cleveland Hopkins Intl

Sat 9/13

5:49 pm-7:23 am

1 stop16h 34m

Ontario

Sat 9/20

8:00 am-5:30 pm

1 stop6h 30m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 22 results
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Best time to book a flight from Cleveland to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Cleveland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Cleveland to Ontario

How far ahead should I book a flight from Cleveland to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Cleveland to Ontario. Price data was last updated on August 8, 2025.

The best time to book flights from Cleveland to Ontario is 27 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Cleveland to Ontario?

Currently, August is the cheapest month in which you can book a flight from Cleveland to Ontario (average of $246). Flying from Cleveland to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CLE to ONT?

Find hourly flight availability from Cleveland to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

One of the essential ways to save on airfare from Cleveland to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 20% on airfare.

What is the cheapest day to fly from Cleveland to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Cleveland to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Cleveland to Ontario flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated August 14, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Cleveland to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,217 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Cleveland to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Cleveland to Ontario round-trip?

    Currently priced at $147, Frontier will fly you from Cleveland to Ontario and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Delta - these airlines can fly you to your destination from $286 and $296, respectively. Users have found that Frontier is 57% cheaper than the other options available to this destination.

  • Can I find deals for flights from Cleveland to Ontario that include hotel bookings?

    Yes. In addition to deals on Cleveland to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Cleveland to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cleveland to Ontario.

  • Can I find deals for business class flights from Cleveland to Ontario?

    Yes. Cheapflights offers flight deals from Cleveland to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Cleveland to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Cleveland to Ontario (average of $246). Flying from Cleveland to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 5 airlines flying from Cleveland to Ontario

Discover the top 5 airlines that operate flights from Cleveland to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$147Average$271FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$286Average$377FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$381FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$324Average$446FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$341Average$459FlexibilityNo cancel feeOn-time63%

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