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$124+ Cheap flights from John F Kennedy Intl, NY (JFK) to Ontario (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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
JFK — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from New York John F Kennedy Intl to Ontario are usually found in March or January, booked 28 days in advance, depart on a Wednesday or Thursday and return on a Monday

Cheap flight deals from John F Kennedy Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from John F Kennedy Intl (JFK) 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 June 12, 2025.

Round-trip from

$234
(Frontier)

One-way from

$124
(Cheapflightsfares)

Popular in

February

Cheapest in

March

Average price

$387

Good round-trip deal

$297 or less

Good one-way deal

$173 or less
From New York John F Kennedy Intl to Ontario
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One-way flight from New York John F Kennedy Intl to Ontario
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High demand for flights, 8% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from New York John F Kennedy Intl to Ontario.
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Price to beat on a one-way flight from New York John F Kennedy Intl to Ontario.
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Find flight deals from John F Kennedy Intl to Ontario

Cheapest flights from John F Kennedy Intl to Ontario
Explore the most affordable flight options available from John F Kennedy Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Frontier deal was found by Cheapflights users on 6/12. 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.
Tue 7/296:59 amJFK - ONT
1 stop12h 21mFrontier
Wed 8/67:22 pmONT - JFK
1 stop7h 08mFrontier
Deal found 6/12$234
This JetBlue deal was found by Cheapflights users on 6/12. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:35 pmJFK - ONT
Nonstop5h 54mJetBlue
Tue 9/2310:56 pmONT - JFK
Nonstop5h 22mJetBlue
Deal found 6/12$257
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/163:00 pmJFK - ONT
1 stop10h 41mDelta
Mon 9/2210:59 pmONT - JFK
1 stop7h 46mDelta
Deal found 6/10$267
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/145:29 pmJFK - ONT
1 stop9h 27mAlaska Airlines
Tue 11/186:00 amONT - JFK
1 stop10h 29mAlaska Airlines
Deal found 6/11$286
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/223:16 pmJFK - ONT
1 stop9h 08mAmerican Airlines
Tue 9/306:10 amONT - JFK
2 stops12h 19mAmerican Airlines
Deal found 6/10$353

Cheapflights Fare Finder

Customize your flight search to find flights from John F Kennedy Intl 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 June 12, 2025.
Use the filters below to find and compare flights from New York John F Kennedy Intl Airport to Ontario that are best for you.

Fly from

John F Kennedy Intl

Fly to

Ontario

Route

Depart

Return

Price

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 7/29

6:59 am-4:20 pm

1 stop12h 21m

Ontario

Wed 8/6

7:22 pm-5:30 am

1 stop7h 08m

$234

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 9/16

6:35 pm-9:29 pm

Nonstop5h 54m

Ontario

Tue 9/23

10:56 pm-7:18 am

Nonstop5h 22m

$257

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 9/16

6:00 am-11:24 am

1 stop8h 24m

Ontario

Tue 9/23

10:59 pm-11:13 am

1 stop9h 14m

$277

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Fri 11/14

5:29 pm-11:56 pm

1 stop9h 27m

Ontario

Tue 11/18

6:00 am-7:29 pm

1 stop10h 29m

$286

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Mon 9/22

3:16 pm-9:24 pm

1 stop9h 08m

Ontario

Tue 9/30

6:10 am-9:29 pm

2 stops12h 19m

$353

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Mon 8/18

6:59 am-11:53 am

1 stop7h 54m

$124

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 9/9

7:29 am-2:09 pm

1 stop9h 40m

$134

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 9/16

6:35 pm-9:29 pm

Nonstop5h 54m

$139

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Wed 9/24

7:29 am-2:09 pm

1 stop9h 40m

$142

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Sat 7/12

2:52 pm-10:34 pm

1 stop10h 42m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 11 results
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Best time to book a flight from John F Kennedy Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from John F Kennedy Intl 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 New York John F Kennedy Intl Airport to Ontario

How far ahead should I book a flight from New York John F Kennedy Intl Airport to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from John F Kennedy Intl to Ontario. Price data was last updated on June 9, 2025.

The price you pay for your flight from New York John F Kennedy Intl Airport to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 28 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from New York John F Kennedy Intl Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from New York John F Kennedy Intl Airport to Ontario (average of $246). Flying from New York John F Kennedy Intl Airport 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 JFK to ONT?

Find hourly flight availability from John F Kennedy Intl 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 June 12, 2025.

When flying from New York John F Kennedy Intl Airport to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 21% versus a flight in the morning.

What is the cheapest day to fly from New York John F Kennedy Intl Airport to Ontario?

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

Travelers seeking maximum savings on their New York John F Kennedy Intl Airport to Ontario flight should consider departing on Saturday at noon when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
To help decide which airline to fly from New York to Ontario, see what other customers have to say about Alaska Airlines, Delta and Hawaiian Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

  • What airport do you fly into for flights to Ontario from New York John F Kennedy Intl?

    For a flight from New York John F Kennedy Intl to Ontario, you will be flying into Ontario. Ontario (ONT) is just 3.1 mi from the center of the city. Ontario is the only Ontario airport and it handles 1 inbound flight from New York John F Kennedy Intl per day. 4 airlines have flights to Ontario from New York John F Kennedy Intl on a regular basis.

  • What are the cheapest airlines flying from New York John F Kennedy Intl Airport to Ontario round-trip?

    Our cheapest airline available from New York John F Kennedy Intl Airport to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $234 on this airline. Additional options worth looking into are JetBlue and Delta, starting at $257 and $277 round-trip. These flights start at 36% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from New York John F Kennedy Intl Airport to Ontario one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $124. Users have also found prices from $134 and $139 on Alaska Airlines and JetBlue, respectively.

  • What are the most reliable airlines from New York John F Kennedy Intl Airport to Ontario?

    Before booking your flight to Ontario from New York John F Kennedy Intl Airport, check out the most reliable airlines to get you to your destination on time: Air Serbia (67%), Etihad Airways (66%), JetBlue( 66%).

  • What are the cheapest flights from New York John F Kennedy Intl Airport to Ontario?

    Looking for the cheapest flight from New York John F Kennedy Intl Airport to Ontario? While on average our users pay $298, our data indicates the cheapest price to be $128. The most popular route (New York John F Kennedy Intl - Ontario), is priced around $251.

  • Can I find deals for flights from John F Kennedy Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on John F Kennedy Intl to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from John F Kennedy Intl to Ontario?

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

  • Can I find deals for business class flights from John F Kennedy Intl to Ontario?

    Yes. Cheapflights offers flight deals from John F Kennedy Intl 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 New York John F Kennedy Intl Airport to Ontario?

    Currently, August is the cheapest month in which you can book a flight from New York John F Kennedy Intl Airport to Ontario (average of $246). Flying from New York John F Kennedy Intl Airport 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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Alternative routes for John F Kennedy Intl to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from John F Kennedy Intl to Ontario

Discover the top 4 airlines that operate flights from John F Kennedy Intl 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$102Average$217FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$236Average$371FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$248Average$393FlexibilityNo cancel feeOn-time71%
DeltaCheapest$258Average$418FlexibilityNo cancel feeOn-timeN/A

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